﻿<?xml-stylesheet type="text/xsl" href="CSWQDatabase4.xsl"?>

<records><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>478</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Chaudary,V.P.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Reflectance spectroscopy detects management and landscape differences in soil carbon and nitrogen.</style></title><secondary-title><style face="normal" font="default">Soil Science Society of America Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil Science Society of America Journal</style></full-title></periodical><pages end="606" start="597">597-606</pages><volume><style face="normal" font="default">76</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">reflectance</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> carbon</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword></keywords><dates><year Day="0" Month="0" Year="2012">2012</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0478-chaudary.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>489</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lerch,R.N.</style></author></authors></contributors><titles><title><style face="normal" font="default">Contaminant transport in two central Missouri karst recharge areas.</style></title><secondary-title><style face="normal" font="default">Journal of Cave and Karst Studies</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Cave and Karst Studies</style></full-title></periodical><pages end="113" start="99">99-113</pages><volume><style face="normal" font="default">73</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">transport</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> area</style></keyword></keywords><dates><year Day="0" Month="0" Year="2012">2012</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0489-lerch.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>490</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Paudel,B.R.</style></author><author><style face="normal" font="default"> Udawatta,R.P.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Anderson,S.H.</style></author></authors></contributors><titles><title><style face="normal" font="default">Soil quality indicator responses to row crop, grazed pasture, and agroforestry buffer management.</style></title><secondary-title><style face="normal" font="default">Agroforestry Systems</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Agroforestry Systems</style></full-title></periodical><pages end="323" start="311">311-323</pages><volume><style face="normal" font="default">84</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">soil</style></keyword><keyword><style face="normal" font="default"> soil quality</style></keyword><keyword><style face="normal" font="default"> QUALITY</style></keyword><keyword><style face="normal" font="default"> row crop</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> PASTURE</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> SYSTEMS</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword></keywords><dates><year Day="0" Month="0" Year="2012">2012</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0490-paudel.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>484</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Viator,R.P.</style></author><author><style face="normal" font="default"> Gwathmey,C.O.</style></author><author><style face="normal" font="default"> Cothren,J.T.</style></author><author><style face="normal" font="default"> Reed,J.T.</style></author><author><style face="normal" font="default"> Vories,E.D.</style></author><author><style face="normal" font="default"> Nuti,R.K.</style></author><author><style face="normal" font="default"> Edmisten,K.L.</style></author><author><style face="normal" font="default"> Wells,R.</style></author></authors></contributors><titles><title><style face="normal" font="default">Influence of ultranarrow row and conventional row cotton on the last effective boll population. Agron. J. 100(5):1327-1331. 2008.</style></title><secondary-title><style face="normal" font="default">Agronomy Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Agronomy Journal</style></full-title></periodical><pages end="1331" start="1327">1327-1331</pages><volume><style face="normal" font="default">100</style></volume><number><style face="normal" font="default">5</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">cotton</style></keyword></keywords><dates><year Day="0" Month="0" Year="2012">2012</year></dates><urls><pdf-urls><url ppv-ref="no">http://hdl.handle.net/10113/48931</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>491</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Zobiole,L.H.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Oliveira,R.S.</style></author><author><style face="normal" font="default"> Constantin,J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Glyphosate effects on photosynthesis, nutrient accumulation, and nodulation in glyphosate-resistant soybean.</style></title><secondary-title><style face="normal" font="default">Journal of Plant Nutrition and Soil Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Plant Nutrition and Soil Science</style></full-title></periodical><pages end="330" start="319">319-330</pages><volume><style face="normal" font="default">175</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">glyphosate</style></keyword><keyword><style face="normal" font="default"> photosynthesis</style></keyword><keyword><style face="normal" font="default"> NODULATION</style></keyword><keyword><style face="normal" font="default"> soybean</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword></keywords><dates><year Day="0" Month="0" Year="2012">2012</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0491-zobiole.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>454</rec-number><ref-type name="Book Chapter">3</ref-type><contributors><authors><author><style face="normal" font="default">Adamchuk,V.I.</style></author><author><style face="normal" font="default"> Viscarra Rossel,R.A.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Schulze Lammers,P.</style></author></authors><secondary-authors><author><style face="normal" font="default">Thomas,C.</style></author></secondary-authors></contributors><titles><title><style face="normal" font="default">Sensor fusion for precision agriculture</style></title><alt-title><style face="normal" font="default">Sensor Fusion - Foundation and Applications.</style></alt-title></titles><periodical/><pages end="40" start="27">27-40</pages><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">sensor</style></keyword><keyword><style face="normal" font="default"> precision agriculture</style></keyword><keyword><style face="normal" font="default"> Agriculture</style></keyword><keyword><style face="normal" font="default"> applications</style></keyword></keywords><dates><year Day="0" Month="0" Year="2011">2011</year></dates><pub-location><style face="normal" font="default">Croatia</style></pub-location><publisher><style face="normal" font="default">In-Tech</style></publisher><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0454-adamchuk.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>470</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Bellaloui,N.</style></author><author><style face="normal" font="default"> Reddy,K.N.</style></author><author><style face="normal" font="default"> Bruns,H.A.</style></author><author><style face="normal" font="default"> Gillen,A.M.</style></author><author><style face="normal" font="default"> Mengistu,A.</style></author><author><style face="normal" font="default"> Zobiole,L.H.</style></author><author><style face="normal" font="default"> Fisher,D.K.</style></author><author><style face="normal" font="default"> Abbas,H.K.</style></author><author><style face="normal" font="default"> Zablotowicz,R.M.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Soybean seed compostion and quality: interactions of enviroment genotype and management practices</style></title><secondary-title><style face="normal" font="default">Nova Hedwigia</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Nova Hedwigia</style></full-title></periodical><pages end="42" start="1">1-42</pages><volume><style face="normal" font="default">1</style></volume><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">soybean</style></keyword><keyword><style face="normal" font="default"> SEED</style></keyword><keyword><style face="normal" font="default"> QUALITY</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> MANAGEMENT-PRACTICES</style></keyword></keywords><dates><year Day="0" Month="0" Year="2011">2011</year></dates><urls><pdf-urls><url ppv-ref="no">https://www.novapublishers.com/catalog/downloadOA.php?order=1&amp;access=true&amp;osCsid=dce259e514bfcd4c7da4acab29ac046e</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>477</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Bockhold,D.L.</style></author><author><style face="normal" font="default"> Thompson,A.L.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Henggeler,J.C.</style></author></authors></contributors><titles><title><style face="normal" font="default">Irrigation Scheduling Based on Crop Canopy Temperature for Humid Environment</style></title><secondary-title><style face="normal" font="default">Transactions of the ASABE</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the ASABE</style></full-title></periodical><pages end="2028" start="2021">2021-2028</pages><volume><style face="normal" font="default">54</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">CROP</style></keyword><keyword><style face="normal" font="default"> canopy</style></keyword><keyword><style face="normal" font="default"> canopy temperature</style></keyword><keyword><style face="normal" font="default"> temperature</style></keyword><keyword><style face="normal" font="default"> environment</style></keyword><keyword><style face="normal" font="default"> irrigation</style></keyword></keywords><dates><year Day="0" Month="0" Year="2011">2011</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0477-bockhold.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>458</rec-number><ref-type name="Book Chapter">3</ref-type><contributors><authors><author><style face="normal" font="default">Bronson,K.F.</style></author><author><style face="normal" font="default"> Scharf,P.C.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author></authors><secondary-authors><author><style face="normal" font="default">Clay,D.E.</style></author><author><style face="normal" font="default"> Shanahan,J.F.</style></author></secondary-authors></contributors><titles><title><style face="normal" font="default">Use of GIS-based site-specific nitrogen management for improving energy efficiency</style></title><alt-title><style face="normal" font="default">GIS Applications in Agriculture, Volume Two, Nutrient Management for Energy Efficiency.</style></alt-title></titles><periodical/><pages end="384" start="359">359-384</pages><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">site-specific</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> CLAY</style></keyword><keyword><style face="normal" font="default"> applications</style></keyword><keyword><style face="normal" font="default"> Agriculture</style></keyword><keyword><style face="normal" font="default"> volume</style></keyword><keyword><style face="normal" font="default"> nutrient management</style></keyword><keyword><style face="normal" font="default"> GIS</style></keyword></keywords><dates><year Day="0" Month="0" Year="2011">2011</year></dates><pub-location><style face="normal" font="default">Boca Raton, Florida</style></pub-location><publisher><style face="normal" font="default">CRC Press</style></publisher><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0458-bronson.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>451</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Chung,S.O.</style></author><author><style face="normal" font="default"> Jung,K.Y</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author></authors></contributors><titles><title><style face="normal" font="YDIYGO130-KSCpc-EUC-H">Estimation of Korean Paddy Field Soil Properties Using Optical Reflectance</style></title><secondary-title><style face="normal" font="default">Journal of Biosystems Engineering</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Biosystems Engineering</style></full-title></periodical><pages end="39" start="33">33-39</pages><volume><style face="normal" font="default">36</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">estimation</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil properties</style></keyword><keyword><style face="normal" font="default"> reflectance</style></keyword></keywords><dates><year Day="0" Month="0" Year="2011">2011</year></dates><pub-location><style face="normal" font="default">Republic of Korea</style></pub-location><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0451-chung.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>456</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Delgado,J.A.</style></author><author><style face="normal" font="default"> Groffman,P.</style></author><author><style face="normal" font="default"> Nearing,M.A.</style></author><author><style face="normal" font="default"> Goddard,T.</style></author><author><style face="normal" font="default"> Reicosky,D.</style></author><author><style face="normal" font="default"> Lal,R.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Rice,C.</style></author><author><style face="normal" font="default"> Towery,D.</style></author><author><style face="normal" font="default"> Salon,P.</style></author></authors></contributors><titles><title><style face="normal" font="default">Conservation practices to mitigate and adapt to the effects of climate change</style></title><secondary-title><style face="normal" font="default">Journal of Soil and Water Conservation</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Soil and Water Conservation</style></full-title></periodical><pages end="129A" start="118A">118A-129A</pages><volume><style face="normal" font="default">66</style></volume><number><style face="normal" font="default">a</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">RICE</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> water conservation</style></keyword></keywords><dates><year Day="0" Month="0" Year="2011">2011</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0456-delgado.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>457</rec-number><ref-type name="Conference Proceeding">12</ref-type><contributors><authors><author><style face="normal" font="default">Kitchen,N.R.</style></author></authors></contributors><titles><title><style face="normal" font="default">Growing the science of agronomy by growing the profession: a message from the President of the American Society of Agronomy</style></title><secondary-title><style face="normal" font="default">Proceedings of Indo-US Workshop on Precision Agriculture</style></secondary-title><alt-title><style face="normal" font="default">Indo-US Workshop on Precision Agriculture</style></alt-title></titles><periodical><full-title><style face="normal" font="System">Proceedings of Indo-US Workshop on Precision Agriculture</style></full-title></periodical><pages end="16" start="15">15-16</pages><edition><style face="normal" font="default">Ludhiana, India</style></edition><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">precision agriculture</style></keyword><keyword><style face="normal" font="default"> Agriculture</style></keyword></keywords><dates><year Day="0" Month="0" Year="2011">2011</year><pub-dates><date Day="0" Month="0" Year="-32676">February 28-March 3, 2011</date></pub-dates></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0457-kitchen.pdf</url></pdf-urls></urls><misc2><style face="normal" font="default">Ludhiana, India</style></misc2></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>476</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kremer,R.J.</style></author><author><style face="normal" font="default"> Kussman,R.D.</style></author></authors></contributors><titles><title><style face="normal" font="default">Soil quality in a pecan-kura clover alley cropping system in the Midwestern USA</style></title><secondary-title><style face="normal" font="default">Agroforestry Systems</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Agroforestry Systems</style></full-title></periodical><pages end="223" start="213">213-223</pages><volume><style face="normal" font="default">83</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">soil</style></keyword><keyword><style face="normal" font="default"> soil quality</style></keyword><keyword><style face="normal" font="default"> QUALITY</style></keyword><keyword><style face="normal" font="default"> cropping system</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword></keywords><dates><year Day="0" Month="0" Year="2011">2011</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.springerlink.com/content/m25k56hk61487t49/</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>459</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lerch,R.N.</style></author><author><style face="normal" font="default"> Sadler,E.J.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Baffaut,C.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author></authors></contributors><titles><title><style face="normal" font="default">Herbicide transport in Goodwater Creek Experimental Watershed: I. Long-term research on atrazine</style></title><secondary-title><style face="normal" font="default">Journal of American Water Resources Association</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of American Water Resources Association</style></full-title></periodical><pages end="223" start="209">209-223</pages><volume><style face="normal" font="default">47</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">herbicide</style></keyword><keyword><style face="normal" font="default"> transport</style></keyword><keyword><style face="normal" font="default"> watershed</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> atrazine</style></keyword><keyword><style face="normal" font="default"> water</style></keyword></keywords><dates><year Day="0" Month="0" Year="2011">2011</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0459-lerch.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>460</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lerch,R.N.</style></author><author><style face="normal" font="default"> Sadler,E.J.</style></author><author><style face="normal" font="default"> Baffaut,C.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Herbicide transport in Goodwater Creek Experimental Watershed: II. Long-term research on acetochlor, alachlor, metolachlor, and metribuzin</style></title><secondary-title><style face="normal" font="default">Journal of American Water Resources Association</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of American Water Resources Association</style></full-title></periodical><pages end="238" start="224">224-238</pages><volume><style face="normal" font="default">47</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">herbicide</style></keyword><keyword><style face="normal" font="default"> transport</style></keyword><keyword><style face="normal" font="default"> watershed</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> alachlor</style></keyword><keyword><style face="normal" font="default"> metolachlor</style></keyword><keyword><style face="normal" font="default"> water</style></keyword></keywords><dates><year Day="0" Month="0" Year="2011">2011</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0460-lerch.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>464</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lin,C.H.</style></author><author><style face="normal" font="default"> Lerch,R.N.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Garrett,H.E.</style></author><author><style face="normal" font="default"> George,M.F.</style></author></authors></contributors><titles><title><style face="normal" font="default">Stimulated rhizodegradation of atrazine by selected plant species</style></title><secondary-title><style face="normal" font="default">Journal of Environmental Quality</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Environmental Quality</style></full-title></periodical><pages end="1121" start="1113">1113-1121</pages><volume><style face="normal" font="default">40</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">PLANT</style></keyword><keyword><style face="normal" font="default"> species</style></keyword><keyword><style face="normal" font="default"> QUALITY</style></keyword></keywords><dates><year Day="0" Month="0" Year="2011">2011</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0464-lin.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>462</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lin,C.H.</style></author><author><style face="normal" font="default"> Lerch,R.N.</style></author><author><style face="normal" font="default"> Goyne,K.W.</style></author><author><style face="normal" font="default"> Garrett,H.E.</style></author></authors></contributors><titles><title><style face="normal" font="default">Reducing </style><style face="normal" font="MyriadPro-Cond">herbicides and veterinary antibiotics</style><style face="normal" font="default"> losses from agroecosystems using vegetative buffers</style></title><secondary-title><style face="normal" font="default">Journal of Environmental Quality</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Environmental Quality</style></full-title></periodical><pages end="799" start="791">791-799</pages><volume><style face="normal" font="default">40</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">losses</style></keyword><keyword><style face="normal" font="default"> BUFFERS</style></keyword><keyword><style face="normal" font="default"> QUALITY</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword></keywords><dates><year Day="0" Month="0" Year="2011">2011</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0462-lin.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>461</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Miller,B.V.</style></author><author><style face="normal" font="default"> Lerch,R.N.</style></author></authors></contributors><titles><title><style face="normal" font="default">Delineating recharge areas for Onondaga and Cathedral Caves using groundwater tracing techniques</style></title><secondary-title><style face="normal" font="default">Missouri Speleology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Missouri Speleology</style></full-title></periodical><pages end="36" start="1">1-36</pages><volume><style face="normal" font="default">51</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">area</style></keyword><keyword><style face="normal" font="default"> groundwater</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword></keywords><dates><year Day="0" Month="0" Year="2011">2011</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0461-miller.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>469</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Myers,D.B.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Miles,R.J.</style></author><author><style face="normal" font="default"> Sadler,E.J.</style></author><author><style face="normal" font="default"> Grunwald,S.</style></author></authors></contributors><titles><title><style face="normal" font="default">Peak functions for modeling high resolution soil profile data</style></title><secondary-title><style face="normal" font="default">Geoderma</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Geoderma</style></full-title></periodical><pages end="83" start="74">74-83</pages><volume><style face="normal" font="default">166</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">MODELING</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword></keywords><dates><year Day="0" Month="0" Year="2011">2011</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.sciencedirect.com/science/article/pii/S0016706111002163</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>480</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">O'Donnell,T.K.</style></author><author><style face="normal" font="default"> Goyne,K.W.</style></author><author><style face="normal" font="default"> Miles,R.J.</style></author><author><style face="normal" font="default"> Baffaut,C.</style></author><author><style face="normal" font="default"> Anderson,S.H.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Determination of representative elementary areas for soil redoximorphic features identified by digital image processing.</style></title><secondary-title><style face="normal" font="default">Geoderma</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Geoderma</style></full-title></periodical><pages end="146" start="138">138-146</pages><volume><style face="normal" font="default">161</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">determination</style></keyword><keyword><style face="normal" font="default"> area</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword></keywords><dates><year Day="0" Month="0" Year="2011">2011</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0480-odonnell.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>471</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Pengthamkeerati,P.</style></author><author><style face="normal" font="default"> Motavalli,P.P.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Soil microbial activity and functional diversity changed by compaction, poultry litter and cropping in a claypan soil</style></title><secondary-title><style face="normal" font="default">Applied Soil Ecology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Applied Soil Ecology</style></full-title></periodical><pages end="80" start="71">71-80</pages><volume><style face="normal" font="default">48</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">soil</style></keyword><keyword><style face="normal" font="default"> DIVERSITY</style></keyword><keyword><style face="normal" font="default"> compaction</style></keyword><keyword><style face="normal" font="default"> ECOLOGY</style></keyword></keywords><dates><year Day="0" Month="0" Year="2011">2011</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.sciencedirect.com/science/article/pii/S0929139311000205</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>474</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Pengthamkeerati,P.</style></author><author><style face="normal" font="default"> Motavalli,P.P.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="GulliverRM">Soil microbial biomass nitrogen and -glucosaminidase activity response to surface compaction and poultry-litter application in a claypan soil</style></title><secondary-title><style face="normal" font="default">Applied Soil Ecology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Applied Soil Ecology</style></full-title></periodical><pages end="86" start="79">79-86</pages><volume><style face="normal" font="default">51</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">soil</style></keyword><keyword><style face="normal" font="default"> MICROBIAL BIOMASS</style></keyword><keyword><style face="normal" font="default"> biomass</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword><keyword><style face="normal" font="default"> SURFACE</style></keyword><keyword><style face="normal" font="default"> compaction</style></keyword></keywords><dates><year Day="0" Month="0" Year="2011">2011</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.sciencedirect.com/science/article/pii/S0929139311001958</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>482</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Rhine,M.D.</style></author><author><style face="normal" font="default"> Stevens,G.</style></author><author><style face="normal" font="default"> Heiser,J.W.</style></author><author><style face="normal" font="default"> Vories,E.D.</style></author></authors></contributors><titles><title><style face="normal" font="default">Nitrogen fertilization on center pivot sprinkler irrigated rice.</style></title><secondary-title><style face="normal" font="default">Crop Management</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Crop Management</style></full-title></periodical><pages end="" start="">-</pages><volume><style face="normal" font="default">CM-2011-1021-01-RS.</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">nitrogen</style></keyword><keyword><style face="normal" font="default"> center pivot</style></keyword><keyword><style face="normal" font="default"> sprinkler</style></keyword><keyword><style face="normal" font="default"> RICE</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> crop management</style></keyword><keyword><style face="normal" font="default"> management</style></keyword></keywords><dates><year Day="0" Month="0" Year="2011">2011</year></dates><work-type><style face="normal" font="default">10.1094</style></work-type><urls><pdf-urls><url ppv-ref="no">http://www.plantmanagementnetwork.org/sub/cm/research/2011/rice/rice.pdf</url></pdf-urls></urls><misc3><style face="normal" font="default">10.1094</style></misc3></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>475</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Roberts,D.F.</style></author><author><style face="normal" font="default"> Ferguson,R.B.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Adamchuk,V.I.</style></author><author><style face="normal" font="default"> Shanahan,J.F.</style></author></authors></contributors><titles><title><style face="normal" font="default">Relationships between Soil-Based Management Zones and Canopy Sensing for Corn Nitrogen Management</style></title><secondary-title><style face="normal" font="default">Agronomy Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Agronomy Journal</style></full-title></periodical><pages end="129" start="119">119-129</pages><volume><style face="normal" font="default">104</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">management</style></keyword><keyword><style face="normal" font="default"> management zones</style></keyword><keyword><style face="normal" font="default"> ZONE</style></keyword><keyword><style face="normal" font="default"> canopy</style></keyword><keyword><style face="normal" font="default"> sensing</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword></keywords><dates><year Day="0" Month="0" Year="2011">2011</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0475-roberts.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>473</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Scharf,P.C.</style></author><author><style face="normal" font="default"> Shannon,D.K.</style></author><author><style face="normal" font="default"> Palm,H.L.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Drummond,S.T.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Mueller,L.J.</style></author><author><style face="normal" font="default"> Hubbard,V.C.</style></author><author><style face="normal" font="default"> Oliviera,L.F.</style></author></authors></contributors><titles><title><style face="normal" font="default">Sensor-Based Nitrogen Applications Out-Performed Producer-Chosen Rates for Corn in On-Farm Demonstrations</style></title><secondary-title><style face="normal" font="default">Agronomy Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Agronomy Journal</style></full-title></periodical><pages end="1691" start="1683">1683-1691</pages><volume><style face="normal" font="default">103</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">nitrogen</style></keyword><keyword><style face="normal" font="default"> applications</style></keyword><keyword><style face="normal" font="default"> RATES</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword></keywords><dates><year Day="0" Month="0" Year="2011">2011</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0473-scharf.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>455</rec-number><ref-type name="Conference Proceeding">12</ref-type><contributors><authors><author><style face="normal" font="default">Sudduth,K.A.</style></author><author><style face="normal" font="default"> Myers,D.B.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Drummond,S.T.</style></author></authors><secondary-authors><author><style face="normal" font="default">Adamchuk,V.I.</style></author><author><style face="normal" font="default"> Viscarra Rossel,R.A.</style></author></secondary-authors></contributors><titles><title><style face="normal" font="default">Mapping conductivity-depth relationships by combining proximal and penetrating ECa sensors</style></title><secondary-title><style face="normal" font="default">Proceedings of the 2nd Global Workshp on Proximal Soil Sensing,</style></secondary-title><alt-title><style face="normal" font="default">2nd Global Workshop on Proximal Soil Sensing</style></alt-title></titles><periodical><full-title><style face="normal" font="System">Proceedings of the 2nd Global Workshp on Proximal Soil Sensing,</style></full-title></periodical><pages end="35" start="32">32-35</pages><edition><style face="normal" font="default">Montreal, Canada</style></edition><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">mapping</style></keyword><keyword><style face="normal" font="default"> sensors</style></keyword><keyword><style face="normal" font="default"> sensor</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> sensing</style></keyword><keyword><style face="normal" font="default"> CANADA</style></keyword></keywords><dates><year Day="0" Month="0" Year="2011">2011</year></dates><pub-location><style face="normal" font="default">Montreal, Canada</style></pub-location><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0455-sudduth.pdf</url></pdf-urls></urls><misc2><style face="normal" font="default">Montreal, Canada</style></misc2></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>494</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Vories,E.D.</style></author><author><style face="normal" font="default"> Greene,J.</style></author><author><style face="normal" font="default"> Teague,T.</style></author><author><style face="normal" font="default"> Stewart,J.</style></author><author><style face="normal" font="default"> Phipps,B.</style></author><author><style face="normal" font="default"> Pringle,H.C.</style></author><author><style face="normal" font="default"> Clawson,E.</style></author><author><style face="normal" font="default"> Hogan,R.</style></author><author><style face="normal" font="default"> O'Leary,P.F.</style></author><author><style face="normal" font="default"> Griffin,T.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Determining the optimum timing for the final furrow irrigation on Mid-South cotton.</style></title><secondary-title><style face="normal" font="default">Applied Engineering in Agriculture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Applied Engineering in Agriculture</style></full-title></periodical><pages end="745" start="737">737-745</pages><volume><style face="normal" font="default">27</style></volume><number><style face="normal" font="default">5</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">timing</style></keyword><keyword><style face="normal" font="default"> irrigation</style></keyword><keyword><style face="normal" font="default"> cotton</style></keyword></keywords><dates><year Day="0" Month="0" Year="2011">2011</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0494-vories.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>444</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Baffaut,C.</style></author></authors></contributors><titles><title><style face="normal" font="default">Bacteria Modeling with SWAT for Assessment and Remediation Studies - A Review</style></title><secondary-title><style face="normal" font="default">Transactions of the ASABE</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the ASABE</style></full-title></periodical><pages end="1594" start="1585">1585-1594</pages><volume><style face="normal" font="default">53</style></volume><number><style face="normal" font="default">5</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">BACTERIA</style></keyword><keyword><style face="normal" font="default"> MODELING</style></keyword></keywords><dates><year Day="0" Month="0" Year="2010">2010</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0444-baffaut.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>450</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Finocchario,R.G.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Effect of Municipal Wastewater as a Wetland Water Source on Soil Microbial Activity</style></title><secondary-title><style face="normal" font="default">Communications in Soil Science and Plant Analysis</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Communications in Soil Science and Plant Analysis</style></full-title></periodical><pages end="1985" start="1974">1974-1985</pages><volume><style face="normal" font="default">41</style></volume><number><style face="normal" font="default">16-19</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">wetland</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> analysis</style></keyword></keywords><dates><year Day="0" Month="0" Year="2010">2010</year></dates><urls><pdf-urls><url ppv-ref="no">http://hdl.handle.net/10113/47387</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>446</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Ghidey,F.</style></author><author><style face="normal" font="default"> Baffaut,C.</style></author><author><style face="normal" font="default"> Lerch,R.N.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Sadler,E.J.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Herbicide transport to surface runoff from a claypan soil: Scaling from plots to fields</style></title><secondary-title><style face="normal" font="default">Journal of Soil and Water Conservation</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Soil and Water Conservation</style></full-title></periodical><pages end="179" start="168">168-179</pages><volume><style face="normal" font="default">65</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">herbicide</style></keyword><keyword><style face="normal" font="default"> transport</style></keyword><keyword><style face="normal" font="default"> SURFACE</style></keyword><keyword><style face="normal" font="default"> runoff</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> PLOTS</style></keyword><keyword><style face="normal" font="default"> fields</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> water conservation</style></keyword></keywords><dates><year Day="0" Month="0" Year="2010">2010</year></dates><urls><pdf-urls><url ppv-ref="no">http://ddr.nal.usda.gov/dspace/handle/10113/43547</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>436</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Jung,K.Y</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Lee,K.S.</style></author><author><style face="normal" font="default"> Chung,S.O.</style></author></authors></contributors><titles><title><style face="normal" font="AdvP4DF60E">Soil compaction varies by crop management system over a claypan soil landscape</style></title><secondary-title><style face="normal" font="default">Soil &amp; Tillage Research</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil &amp; Tillage Research</style></full-title></periodical><pages end="10" start="1">1-10</pages><volume><style face="normal" font="default">107</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">soil</style></keyword><keyword><style face="normal" font="default"> soil compaction</style></keyword><keyword><style face="normal" font="default"> compaction</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> crop management</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword></keywords><dates><year Day="0" Month="0" Year="2010">2010</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0436-jung.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>421</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kitchen,N.R.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Drummond,S.T.</style></author><author><style face="normal" font="default"> Scharf,P.C.</style></author><author><style face="normal" font="default"> Palm,H.L.</style></author><author><style face="normal" font="default"> Roberts,D.F.</style></author><author><style face="normal" font="default"> Vories,E.D.</style></author></authors></contributors><titles><title><style face="normal" font="default">Ground-based canopy reflectance sensing for variable-rate nitrogen corn fertilization</style></title><secondary-title><style face="normal" font="default">Agronomy Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Agronomy Journal</style></full-title></periodical><pages end="84" start="71">71-84</pages><volume><style face="normal" font="default">102</style></volume><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">canopy</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword><keyword><style face="normal" font="default"> reflectance</style></keyword><keyword><style face="normal" font="default"> sensing</style></keyword><keyword><style face="normal" font="default"> variable-rate</style></keyword></keywords><dates><year Day="0" Month="0" Year="2010">2010</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0421-kitchen.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>437</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lee,K.S.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Drummond,S.T.</style></author><author><style face="normal" font="default"> Lee,D.H.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Chung,S.O.</style></author></authors></contributors><titles><title><style face="normal" font="default">Calibration methods for soil property estimation using reflectance spectroscopy</style></title><secondary-title><style face="normal" font="default">Transactions of the ASABE</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the ASABE</style></full-title></periodical><pages end="684" start="675">675-684</pages><volume><style face="normal" font="default">53</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">calibration</style></keyword><keyword><style face="normal" font="default"> METHODS</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil properties</style></keyword><keyword><style face="normal" font="default"> estimation</style></keyword><keyword><style face="normal" font="default"> reflectance</style></keyword></keywords><dates><year Day="0" Month="0" Year="2010">2010</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0437-lee.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>448</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lin,C.H.</style></author><author><style face="normal" font="default"> Goyne,K.W.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Lerch,R.N.</style></author><author><style face="normal" font="default"> Garrett,H.E.</style></author></authors></contributors><titles><title><style face="normal" font="default">Dissipation of Sulfamethazine and Tetracycline in the Root Zone of Grass and Tree Species</style></title><secondary-title><style face="normal" font="default">Journal of Environmental Quality</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Environmental Quality</style></full-title></periodical><pages end="1278" start="1269">1269-1278</pages><volume><style face="normal" font="default">39</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">ROOT</style></keyword><keyword><style face="normal" font="default"> ZONE</style></keyword><keyword><style face="normal" font="default"> species</style></keyword><keyword><style face="normal" font="default"> QUALITY</style></keyword></keywords><dates><year Day="0" Month="0" Year="2010">2010</year></dates><urls><pdf-urls><url ppv-ref="no">http://ddr.nal.usda.gov/handle/10113/45082</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>438</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Mudgal,A.</style></author><author><style face="normal" font="default"> Baffaut,C.</style></author><author><style face="normal" font="default"> Anderson,S.H.</style></author><author><style face="normal" font="default"> Sadler,E.J.</style></author><author><style face="normal" font="default"> Thompson,A.L.</style></author></authors></contributors><titles><title><style face="normal" font="default">APEX Model Assessment of Variable Landscapes on Runoff and Dissolved Herbicides</style></title><secondary-title><style face="normal" font="default">Transactions of the ASABE</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the ASABE</style></full-title></periodical><pages end="1058" start="1047">1047-1058</pages><volume><style face="normal" font="default">53</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">MODEL</style></keyword><keyword><style face="normal" font="default"> landscapes</style></keyword><keyword><style face="normal" font="default"> runoff</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword></keywords><dates><year Day="0" Month="0" Year="2010">2010</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0438-mudgal.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>443</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Mudgal,A.</style></author><author><style face="normal" font="default"> Anderson,S.H.</style></author><author><style face="normal" font="default"> Baffaut,C.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Sadler,E.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Effects of long-term soil and crop management on soil hydraulic properties for claypan soils</style></title><secondary-title><style face="normal" font="default">Journal of Soil and Water Conservation</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Soil and Water Conservation</style></full-title></periodical><pages end="403" start="393">393-403</pages><volume><style face="normal" font="default">65</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">soil</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> crop management</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> claypan soils</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword></keywords><dates><year Day="0" Month="0" Year="2010">2010</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0443-mudgal.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>449</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">O'Donnell,T.K.</style></author><author><style face="normal" font="default"> Goyne,K.W.</style></author><author><style face="normal" font="default"> Miles,R.J.</style></author><author><style face="normal" font="default"> Baffaut,C.</style></author><author><style face="normal" font="default"> Anderson,S.H.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Identification and quantification of soil redoximorphic features by digital image processing</style></title><secondary-title><style face="normal" font="default">Geoderma</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Geoderma</style></full-title></periodical><pages end="96" start="86">86-96</pages><volume><style face="normal" font="default">157</style></volume><number><style face="normal" font="default">3-4</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">soil</style></keyword></keywords><dates><year Day="0" Month="0" Year="2010">2010</year></dates><urls><pdf-urls><url ppv-ref="no">http://hdl.handle.net/10113/44389</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>422</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Roberts,D.F.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Scharf,P.C.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Will variable-rate nitrogen fertilization using corn canopy reflectance sensing deliver environmental benefits?</style></title><secondary-title><style face="normal" font="default">Agronomy Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Agronomy Journal</style></full-title></periodical><pages end="95" start="85">85-95</pages><volume><style face="normal" font="default">102</style></volume><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">canopy</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword><keyword><style face="normal" font="default"> reflectance</style></keyword><keyword><style face="normal" font="default"> sensing</style></keyword><keyword><style face="normal" font="default"> variable-rate</style></keyword></keywords><dates><year Day="0" Month="0" Year="2010">2010</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0422-roberts.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>479</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Souza,E.G.</style></author><author><style face="normal" font="default"> Scharf,P.C.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">The influence of sun position and clouds on reflectance and vegetation indices of greenhouse-grown corn.</style></title><secondary-title><style face="normal" font="default">Agronomy Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Agronomy Journal</style></full-title></periodical><pages end="744" start="734">734-744</pages><volume><style face="normal" font="default">102</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">corn</style></keyword><keyword><style face="normal" font="default"> position</style></keyword><keyword><style face="normal" font="default"> reflectance</style></keyword></keywords><dates><year Day="0" Month="0" Year="2010">2010</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0479-souza.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>447</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Stone,K.C.</style></author><author><style face="normal" font="default"> Camp,C.R.</style></author><author><style face="normal" font="default"> Sadler,E.J.</style></author><author><style face="normal" font="default"> Evans,D.E.</style></author><author><style face="normal" font="default"> Millen,J.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Corn Yield Response to Nitrogen Fertilizer and Irrigation in the Southeastern Coastal Plain</style></title><secondary-title><style face="normal" font="default">Applied Engineering in Agriculture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Applied Engineering in Agriculture</style></full-title></periodical><pages end="438" start="429">429-438</pages><volume><style face="normal" font="default">26</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">corn</style></keyword><keyword><style face="normal" font="default"> corn yield</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> YIELD RESPONSE</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword><keyword><style face="normal" font="default"> fertilizer</style></keyword><keyword><style face="normal" font="default"> irrigation</style></keyword><keyword><style face="normal" font="default"> COASTAL-PLAIN</style></keyword><keyword><style face="normal" font="default"> Agriculture</style></keyword></keywords><dates><year Day="0" Month="0" Year="2010">2010</year></dates><urls><pdf-urls><url ppv-ref="no">http://ddr.nal.usda.gov/handle/10113/44314</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>442</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Sudduth,K.A.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Myers,D.B.</style></author><author><style face="normal" font="default"> Drummond,S.T.</style></author></authors></contributors><titles><title><style face="normal" font="default">Mapping Depth to Argillic Soil Horizons Using Apparent Electrical Conductivity</style></title><secondary-title><style face="normal" font="default">Journal of Environmental and Engineering Geophysics</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Environmental and Engineering Geophysics</style></full-title></periodical><pages end="146" start="135">135-146</pages><volume><style face="normal" font="default">15</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">mapping</style></keyword><keyword><style face="normal" font="default"> depth</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> electrical conductivity</style></keyword><keyword><style face="normal" font="default"> ELECTRICAL-CONDUCTIVITY</style></keyword></keywords><dates><year Day="0" Month="0" Year="2010">2010</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0442-sudduth.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>463</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Thompson,B.</style></author><author><style face="normal" font="default"> Lin,C.H.</style></author><author><style face="normal" font="default"> Hsieh,H.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Lerch,R.N.</style></author><author><style face="normal" font="default"> Garrett,H.E.</style></author></authors></contributors><titles><title><style face="normal" font="default">Evaluation of PCR-based quantification techniques to estimate the abundance of atrazine chlorohydrolase gene atzA in rhizosphere soils.</style></title><secondary-title><style face="normal" font="default">Journal of Environmental Quality</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Environmental Quality</style></full-title></periodical><pages end="2005" start="1999">1999-2005</pages><volume><style face="normal" font="default">39</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">evaluation</style></keyword><keyword><style face="normal" font="default"> atrazine</style></keyword><keyword><style face="normal" font="default"> rhizosphere</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> QUALITY</style></keyword></keywords><dates><year Day="0" Month="0" Year="2010">2010</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0463-thompson.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>435</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Williams,J.D.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Scharf,P.C.</style></author><author><style face="normal" font="default"> Stevens,W.E.</style></author></authors></contributors><titles><title><style face="normal" font="default">Within-field nitrogen response in corn related to aerial photograph color</style></title><secondary-title><style face="normal" font="default">Precision Agriculture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Precision Agriculture</style></full-title></periodical><pages end="305" start="291">291-305</pages><volume><style face="normal" font="default">11</style></volume><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">nitrogen</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> aerial</style></keyword><keyword><style face="normal" font="default"> color</style></keyword></keywords><dates><year Day="0" Month="0" Year="2010">2010</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0435-williams.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>468</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Wrather,J.A.</style></author><author><style face="normal" font="default"> Stevens,W.E.</style></author><author><style face="normal" font="default"> Vories,E.D.</style></author><author><style face="normal" font="default"> Kirkpatrick,T.L.</style></author><author><style face="normal" font="default"> Mueller,J.D.</style></author><author><style face="normal" font="default"> Mauromoustakos,A.</style></author></authors></contributors><titles><title><style face="normal" font="default">The Use of Root Gall Ratings to Determine High Risk Zones in Cotton Fields Infested by Meloidogyne incognita.</style></title><secondary-title><style face="normal" font="default">Crop Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Crop Science</style></full-title></periodical><pages end="2579" start="2575">2575-2579</pages><volume><style face="normal" font="default">50</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">ROOT</style></keyword><keyword><style face="normal" font="default"> ZONE</style></keyword><keyword><style face="normal" font="default"> cotton</style></keyword><keyword><style face="normal" font="default"> fields</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword></keywords><dates><year Day="0" Month="0" Year="2010">2010</year></dates><urls><pdf-urls><url ppv-ref="no">http://hdl.handle.net/10113/48727</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>465</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Zobiole,L.H.</style></author><author><style face="normal" font="default"> Oliveira Jr.,R.S.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Muniz,A.S.</style></author><author><style face="normal" font="default"> Oliveira Jr.,A.O.</style></author></authors></contributors><titles><title><style face="normal" font="default">Nutrient accumulation and photosynthesis in glyphosate-resistant soybeans is reduced under glyphosate use</style></title><secondary-title><style face="normal" font="default">Journal of Plant Nutrition</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Plant Nutrition</style></full-title></periodical><pages end="1873" start="1860">1860-1873</pages><volume><style face="normal" font="default">33</style></volume><number><style face="normal" font="default">12-14</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">glyphosate</style></keyword><keyword><style face="normal" font="default"> photosynthesis</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> plant nutrition</style></keyword><keyword><style face="normal" font="default"> soybean</style></keyword><keyword><style face="normal" font="default"> soybeans</style></keyword></keywords><dates><year Day="0" Month="0" Year="2010">2010</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.tandf.co.uk/journals/titles/01904167.asp</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>492</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Zobiole,L.H.</style></author><author><style face="normal" font="default"> Oliveira,R.S.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Constantin,J.</style></author><author><style face="normal" font="default"> Bonato,C.M.</style></author><author><style face="normal" font="default"> Muniz,A.S.</style></author></authors></contributors><titles><title><style face="normal" font="default">Water use efficiency and photosynthesis of glyphosate-resistant soybean as affected by glyphosate.</style></title><secondary-title><style face="normal" font="default">Pesticide Biochemistry and Physiology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Pesticide Biochemistry and Physiology</style></full-title></periodical><pages end="193" start="182">182-193</pages><volume><style face="normal" font="default">97</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">water</style></keyword><keyword><style face="normal" font="default"> water use</style></keyword><keyword><style face="normal" font="default"> WATER-USE</style></keyword><keyword><style face="normal" font="default"> use efficiency</style></keyword><keyword><style face="normal" font="default"> photosynthesis</style></keyword><keyword><style face="normal" font="default"> soybean</style></keyword><keyword><style face="normal" font="default"> glyphosate</style></keyword><keyword><style face="normal" font="default"> pesticide</style></keyword></keywords><dates><year Day="0" Month="0" Year="2010">2010</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0492-zobiole.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>427</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Zobiole,L.H.</style></author><author><style face="normal" font="default"> Oliveira,R.S.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Constantin,J.</style></author><author><style face="normal" font="default"> Yamada,T.</style></author><author><style face="normal" font="default"> Castro,C.</style></author><author><style face="normal" font="default"> Oliveira,F.A.</style></author><author><style face="normal" font="default"> Oliveira,A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Effect of glyphosate on symbiotic N2 fixation and nickel concentration in glyphosate-resistant soybean</style></title><secondary-title><style face="normal" font="default">Applied Soil Ecology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Applied Soil Ecology</style></full-title></periodical><pages end="180" start="176">176-180</pages><volume><style face="normal" font="default">44</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">glyphosate</style></keyword><keyword><style face="normal" font="default"> FIXATION</style></keyword><keyword><style face="normal" font="default"> soybean</style></keyword></keywords><dates><year Day="0" Month="0" Year="2010">2010</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0427-zobiole.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>466</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Zobiole,L.H.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Oliveira Jr.,R.S.</style></author><author><style face="normal" font="default"> Constantin,J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Glyphosate affects photosynthesis in first and second generation of glyphosate-resistant soybeans</style></title><secondary-title><style face="normal" font="default">Plant and Soil</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Plant and Soil</style></full-title></periodical><pages end="" start="251-265">251-265-</pages><volume><style face="normal" font="default">336</style></volume><number><style face="normal" font="default">1-2</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">glyphosate</style></keyword><keyword><style face="normal" font="default"> photosynthesis</style></keyword><keyword><style face="normal" font="default"> soybeans</style></keyword><keyword><style face="normal" font="default"> soybean</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> Netherlands</style></keyword></keywords><dates><year Day="0" Month="0" Year="2010">2010</year></dates><urls><pdf-urls><url ppv-ref="no">http://dx.doi.org/10.1007/s11104-010-0474-3</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>467</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Zobiole,L.H.</style></author><author><style face="normal" font="default"> Oliveira Jr.,R.S.</style></author><author><style face="normal" font="default"> Visentainer,J.V.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Bellaloui,N.</style></author><author><style face="normal" font="default"> Yamada,T.</style></author></authors></contributors><titles><title><style face="normal" font="default">Glyphosate Affects Seed Composition in Glyphosate-Resistant Soybean</style></title><secondary-title><style face="normal" font="default">Journal of Agricultural and Food Chemistry</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Agricultural and Food Chemistry</style></full-title></periodical><pages end="4522" start="4517">4517-4522</pages><volume><style face="normal" font="default">58</style></volume><number><style face="normal" font="default">7</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">glyphosate</style></keyword><keyword><style face="normal" font="default"> SEED</style></keyword><keyword><style face="normal" font="default"> soybean</style></keyword></keywords><dates><year Day="0" Month="0" Year="2010">2010</year></dates><urls><pdf-urls><url ppv-ref="no">http://hdl.handle.net/10113/42960</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>401</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Baffaut,C.</style></author><author><style face="normal" font="default"> Benson,V.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Modeling Flow and Pollutant Transport in a Karst Watershed with SWAT</style></title><secondary-title><style face="normal" font="default">Transactions of the ASABE</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the ASABE</style></full-title></periodical><pages end="479" start="469">469-479</pages><volume><style face="normal" font="default">52</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">FLOW</style></keyword><keyword><style face="normal" font="default"> MODELING</style></keyword><keyword><style face="normal" font="default"> transport</style></keyword><keyword><style face="normal" font="default"> watershed</style></keyword></keywords><dates><year Day="0" Month="0" Year="2009">2009</year></dates><urls><pdf-urls><url ppv-ref="no">http://ddr.nal.usda.gov/bitstream/10113/30434/1/IND44219647.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>418</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Bauer,P.J.</style></author><author><style face="normal" font="default"> Foulk,J.A.</style></author><author><style face="normal" font="default"> Gambler,G.R.</style></author><author><style face="normal" font="default"> Sadler,E.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">A Comparison of Two Cotton Cultivars Differing in Maturity for Within-Canopy Fiber Property Variation</style></title><secondary-title><style face="normal" font="default">Crop Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Crop Science</style></full-title></periodical><pages end="657" start="651">651-657</pages><volume><style face="normal" font="default">49</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">cotton</style></keyword><keyword><style face="normal" font="default"> cultivars</style></keyword><keyword><style face="normal" font="default"> MATURITY</style></keyword><keyword><style face="normal" font="default"> FIBER</style></keyword><keyword><style face="normal" font="default"> variation</style></keyword></keywords><dates><year Day="0" Month="0" Year="2009">2009</year></dates><urls><pdf-urls><url ppv-ref="no">http://hdl.handle.net/10113/29905</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>408</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Finocchario,R.G.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Frederickson,L.H.</style></author></authors></contributors><titles><title><style face="normal" font="default">Impact of Municipal Wastewater Effluent on Seed Bank Response and Soils Excavated from a Wetland Impoundment</style></title><secondary-title><style face="normal" font="default">Wetlands : the journal of the Society of the Wetland Scientist</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Wetlands : the journal of the Society of the Wetland Scientist</style></full-title></periodical><pages end="723" start="713">713-723</pages><volume><style face="normal" font="default">29</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">IMPACT</style></keyword><keyword><style face="normal" font="default"> SEED</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> wetland</style></keyword></keywords><dates><year Day="0" Month="0" Year="2009">2009</year></dates><urls><pdf-urls><url ppv-ref="no">http://ddr.nal.usda.gov/bitstream/10113/33734/1/IND44250964.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>403</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Jang,G.S.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Sadler,E.J.</style></author><author><style face="normal" font="default"> Lerch,R.N.</style></author></authors></contributors><titles><title><style face="normal" font="default">Watershed-scale crop type classification using seasonal trends in remote sensing-derived vegetation indices</style></title><secondary-title><style face="normal" font="default">Transactions of the ASABE</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the ASABE</style></full-title></periodical><pages end="1544" start="1535">1535-1544</pages><volume><style face="normal" font="default">52</style></volume><number><style face="normal" font="default">5</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">CROP</style></keyword><keyword><style face="normal" font="default"> CLASSIFICATION</style></keyword></keywords><dates><year Day="0" Month="0" Year="2009">2009</year></dates><urls><pdf-urls><url ppv-ref="no">http://ddr.nal.usda.gov/bitstream/10113/37987/1/IND44295112.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>402</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Jiang,P.</style></author><author><style face="normal" font="default"> Zhuoqiong,H.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Bayesian analysis of within-field variability of corn yield using a spatial hierarchical model</style></title><secondary-title><style face="normal" font="default">Precision Agriculture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Precision Agriculture</style></full-title></periodical><pages end="127" start="111">111-127</pages><volume><style face="normal" font="default">10</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">VARIABILITY</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> corn yield</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> MODEL</style></keyword></keywords><dates><year Day="0" Month="0" Year="2009">2009</year></dates><urls><pdf-urls><url ppv-ref="no">http://hdl.handle.net/10113/27489</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>419</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kim,H.J.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Hummel,J.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Soil macronutrient sensing for precision agriculture</style></title><secondary-title><style face="normal" font="default">Journal of Environmental Monitoring</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Environmental Monitoring</style></full-title></periodical><pages end="1824" start="1810">1810-1824</pages><volume><style face="normal" font="default">11</style></volume><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">soil</style></keyword><keyword><style face="normal" font="default"> sensing</style></keyword><keyword><style face="normal" font="default"> precision agriculture</style></keyword></keywords><dates><year Day="0" Month="0" Year="2009">2009</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0419-kim.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>409</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kremer,R.J.</style></author><author><style face="normal" font="default"> Means,N.E.</style></author></authors></contributors><titles><title><style face="normal" font="default">Glyphosate and glyphosate-resistant crop interactions with rhizosphere microorganisms</style></title><secondary-title><style face="normal" font="default">European journal of agronomy</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">European journal of agronomy</style></full-title></periodical><pages end="161" start="153">153-161</pages><volume><style face="normal" font="default">31</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">glyphosate</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> rhizosphere</style></keyword><keyword><style face="normal" font="default"> MICROORGANISMS</style></keyword></keywords><dates><year Day="0" Month="0" Year="2009">2009</year></dates><urls><pdf-urls><url ppv-ref="no">http://hdl.handle.net/10113/35795</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>424</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kremer,R.J.</style></author><author><style face="normal" font="default"> Ben-Hammouda,M.</style></author></authors></contributors><titles><title><style face="normal" font="default">Allelopathic plants: 19. Barley (Hordeum vulgare L)</style></title><secondary-title><style face="normal" font="default">Allelopathy Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Allelopathy Journal</style></full-title></periodical><pages end="242" start="225">225-242</pages><volume><style face="normal" font="default">24</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">PLANTS</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> barley</style></keyword></keywords><dates><year Day="0" Month="0" Year="2009">2009</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0424-kremer.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>404</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lee,K.S.</style></author><author><style face="normal" font="default"> Lee,D.H.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Chung,S.O.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Drummond,S.T.</style></author></authors></contributors><titles><title><style face="normal" font="default">Wavelength Identification and Diffuse Reflectance Estimation for Surface and Profile Soil Properties</style></title><secondary-title><style face="normal" font="default">Transactions of the ASABE</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the ASABE</style></full-title></periodical><pages end="695" start="683">683-695</pages><volume><style face="normal" font="default">52</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">reflectance</style></keyword><keyword><style face="normal" font="default"> estimation</style></keyword><keyword><style face="normal" font="default"> SURFACE</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil properties</style></keyword></keywords><dates><year Day="0" Month="0" Year="2009">2009</year></dates><urls><pdf-urls><url ppv-ref="no">http://ddr.nal.usda.gov/bitstream/10113/34384/1/IND44264197.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>413</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Noellsch,A.J.</style></author><author><style face="normal" font="default"> Motavalli,P.P.</style></author><author><style face="normal" font="default"> Nelson,K.A.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author></authors></contributors><titles><title><style face="normal" font="default">Corn Response to Conventional and Slow-Release Nitrogen Fertilizers across a Claypan Landscape</style></title><secondary-title><style face="normal" font="default">Agronomy Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Agronomy Journal</style></full-title></periodical><pages end="614" start="607">607-614</pages><volume><style face="normal" font="default">101</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">corn</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword><keyword><style face="normal" font="default"> fertilizers</style></keyword><keyword><style face="normal" font="default"> fertilizer</style></keyword></keywords><dates><year Day="0" Month="0" Year="2009">2009</year></dates><urls><pdf-urls><url ppv-ref="no">http://hdl.handle.net/10113/31418</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>425</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Oueslati,O.</style></author><author><style face="normal" font="default"> Ben-Hammouda,M.</style></author><author><style face="normal" font="default"> ghorbel,M.H.</style></author><author><style face="normal" font="default"> El Gazzeh,M.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Role of phenolic acids in expression of barley (Hordeum vugare) autotoxicity</style></title><secondary-title><style face="normal" font="default">Allelopathy Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Allelopathy Journal</style></full-title></periodical><pages end="166" start="157">157-166</pages><volume><style face="normal" font="default">23</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">ACIDS</style></keyword><keyword><style face="normal" font="default"> barley</style></keyword><keyword><style face="normal" font="default"> PHENOLIC ACIDS</style></keyword></keywords><dates><year Day="0" Month="0" Year="2009">2009</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0425-oueslati.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>411</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Schomberg,H.H.</style></author><author><style face="normal" font="default"> Weitholter,S.</style></author><author><style face="normal" font="default"> Griffin,T.S.</style></author><author><style face="normal" font="default"> Reeves,D.W.</style></author><author><style face="normal" font="default"> Cabrera,M.L.</style></author><author><style face="normal" font="default"> Fisher,D.S.</style></author><author><style face="normal" font="default"> Endale,D.M.</style></author><author><style face="normal" font="default"> Balkcom,K.S.</style></author><author><style face="normal" font="default"> Raper,R.L.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Locke,M.A.</style></author><author><style face="normal" font="default"> Potter,K.N.</style></author><author><style face="normal" font="default"> Schwartz,R.C.</style></author><author><style face="normal" font="default"> Trumank,C.C.</style></author><author><style face="normal" font="default"> Tyler,D.D.</style></author></authors></contributors><titles><title><style face="normal" font="default">Assessing Indices for Predicting Potential Nitrogen Mineralization in Soils under Different Management Systems</style></title><secondary-title><style face="normal" font="default">Soil Science Society of America Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil Science Society of America Journal</style></full-title></periodical><pages end="1586" start="1575">1575-1586</pages><volume><style face="normal" font="default">73</style></volume><number><style face="normal" font="default">5</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">nitrogen</style></keyword><keyword><style face="normal" font="default"> mineralization</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> management systems</style></keyword><keyword><style face="normal" font="default"> SYSTEMS</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword></keywords><dates><year Day="0" Month="0" Year="2009">2009</year></dates><urls><pdf-urls><url ppv-ref="no">http://hdl.handle.net/10113/36062</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>406</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Steiner,J.L.</style></author><author><style face="normal" font="default"> Sadler,E.J.</style></author><author><style face="normal" font="default"> Wilson,G.</style></author><author><style face="normal" font="default"> Hatfield,J.</style></author><author><style face="normal" font="default"> James,D.</style></author><author><style face="normal" font="default"> Vandenberg,B.</style></author><author><style face="normal" font="default"> Chen,J.S.</style></author><author><style face="normal" font="default"> Oster,T.</style></author><author><style face="normal" font="default"> Ross,J.D.</style></author><author><style face="normal" font="default"> Cole,K.</style></author></authors></contributors><titles><title><style face="normal" font="default">STEWARDS Watershed Data System: System Design and Implementation</style></title><secondary-title><style face="normal" font="default">Transactions of the ASABE</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the ASABE</style></full-title></periodical><pages end="1533" start="1523">1523-1533</pages><volume><style face="normal" font="default">52</style></volume><number><style face="normal" font="default">5</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">watershed</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> design</style></keyword></keywords><dates><year Day="0" Month="0" Year="2009">2009</year></dates><urls><pdf-urls><url ppv-ref="no">http://hdl.handle.net/10113/37984</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>441</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Steiner,J.L.</style></author><author><style face="normal" font="default"> Sadler,E.J.</style></author><author><style face="normal" font="default"> Hatfield,J.L.</style></author><author><style face="normal" font="default"> Wilson,G.</style></author><author><style face="normal" font="default"> James,D.E.</style></author><author><style face="normal" font="default"> Vandenberg,B.</style></author><author><style face="normal" font="default"> Ross,J.D.</style></author><author><style face="normal" font="default"> Oster,T.</style></author><author><style face="normal" font="default"> Cole,K.</style></author></authors></contributors><titles><title><style face="normal" font="default">Data management to enhance long-term watershed research: Context and STEWARDS case study</style></title><secondary-title><style face="normal" font="default">Journal of Ecohydrology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Ecohydrology</style></full-title></periodical><pages end="398" start="391">391-398</pages><volume><style face="normal" font="default">2</style></volume><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">management</style></keyword><keyword><style face="normal" font="default"> watershed</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> case studies</style></keyword></keywords><dates><year Day="0" Month="0" Year="2009">2009</year></dates><urls><pdf-urls><url ppv-ref="no">http://hdl.handle.net/10113/38988</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>410</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Udawatta,R.P.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Garrett,H.E.</style></author><author><style face="normal" font="default"> Anderson S.H.</style></author></authors></contributors><titles><title><style face="normal" font="default">Soil enzyme activities and physical properties in a watershed managed under agroforestry and row-crop systems</style></title><secondary-title><style face="normal" font="default">Agriculture, ecosystems &amp; environment</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Agriculture, ecosystems &amp; environment</style></full-title></periodical><pages end="104" start="98">98-104</pages><volume><style face="normal" font="default">31</style></volume><number><style face="normal" font="default">1-2</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">soil</style></keyword><keyword><style face="normal" font="default"> soil enzyme activity</style></keyword><keyword><style face="normal" font="default"> ENZYME-ACTIVITIES</style></keyword><keyword><style face="normal" font="default"> PHYSICAL-PROPERTIES</style></keyword><keyword><style face="normal" font="default"> watershed</style></keyword><keyword><style face="normal" font="default"> row crop</style></keyword><keyword><style face="normal" font="default"> SYSTEMS</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword></keywords><dates><year Day="0" Month="0" Year="2009">2009</year></dates><urls><pdf-urls><url ppv-ref="no">http://hdl.handle.net/10113/29016</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>414</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Vories,E.D.</style></author><author><style face="normal" font="default"> Tacker,P.L.</style></author><author><style face="normal" font="default"> Lancaster,S.W.</style></author><author><style face="normal" font="default"> Glover,R.E.</style></author></authors></contributors><titles><title><style face="normal" font="default">Subsurface drip irrigation of corn in the United States Mid-South</style></title><secondary-title><style face="normal" font="default">Agricultural Water Management</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Agricultural Water Management</style></full-title></periodical><pages end="916" start="912">912-916</pages><volume><style face="normal" font="default">96</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">irrigation</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> United States</style></keyword><keyword><style face="normal" font="default"> UNITED-STATES</style></keyword><keyword><style face="normal" font="default"> STATES</style></keyword></keywords><dates><year Day="0" Month="0" Year="2009">2009</year></dates><urls><pdf-urls><url ppv-ref="no">http://hdl.handle.net/10113/29737</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>426</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Yamada,T.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Castro,P.R.</style></author><author><style face="normal" font="default"> Wood,B.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Glyphosate interactions with physiology, nutrition, and diseases of plants: Threat to agricultural sustainability?</style></title><secondary-title><style face="normal" font="default">European journal of agronomy</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">European journal of agronomy</style></full-title></periodical><pages end="113" start="111">111-113</pages><volume><style face="normal" font="default">31</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">glyphosate</style></keyword><keyword><style face="normal" font="default"> DISEASE</style></keyword><keyword><style face="normal" font="default"> PLANTS</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> sustainability</style></keyword></keywords><dates><year Day="0" Month="0" Year="2009">2009</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0426-yamada.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>395</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Adamchuk,V.I.</style></author><author><style face="normal" font="default"> Ingram,T.J.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Chung,S.O.</style></author></authors></contributors><titles><title><style face="normal" font="default">On-the-go mapping of soil mechanical resistance using a linear depth effect model.</style></title><secondary-title><style face="normal" font="default">Transactions of the ASABE</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the ASABE</style></full-title></periodical><pages end="1894" start="1885">1885-1894</pages><volume><style face="normal" font="default">51</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">depth</style></keyword><keyword><style face="normal" font="default"> mapping</style></keyword><keyword><style face="normal" font="default"> MODEL</style></keyword><keyword><style face="normal" font="default"> RESISTANCE</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword></keywords><dates><year Day="0" Month="0" Year="2008">2008</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0395-adamchuk.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>396</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Chung,S.O.</style></author><author><style face="normal" font="default"> Jung,I.K.</style></author><author><style face="normal" font="default"> Sung,J.H.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Drummond,S.T.</style></author></authors></contributors><titles><title><style face="normal" font="default">Analysis of spatial variability in a Korean paddy field using median polish detrending.</style></title><secondary-title><style face="normal" font="default">Journal of Biosystems Engineering</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Biosystems Engineering</style></full-title></periodical><pages end="369" start="362">362-369</pages><volume><style face="normal" font="default">33</style></volume><number><style face="normal" font="default">5</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">SPATIAL VARIABILITY</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword></keywords><dates><year Day="0" Month="0" Year="2008">2008</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0396-chung.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>320</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Chung,S.O.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Plouffe,C.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author></authors></contributors><titles><title><style face="normal" font="default">Soil bin and field tests of an on-the-go soil strength profile sensor</style></title><secondary-title><style face="normal" font="default">Transactions of the ASABE</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the ASABE</style></full-title></periodical><pages end="18" start="5">5-18</pages><volume><style face="normal" font="default">51</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">soil</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> field tests</style></keyword><keyword><style face="normal" font="default"> TESTS</style></keyword><keyword><style face="normal" font="default"> soil strength</style></keyword><keyword><style face="normal" font="default"> strength</style></keyword><keyword><style face="normal" font="default"> sensor</style></keyword></keywords><dates><year Day="0" Month="0" Year="2008">2008</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0320-202275.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>397</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Chung,S.O.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Tan,J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Spectral analysis of on-the-go soil strength sensor data</style></title><secondary-title><style face="normal" font="default">Journal of Biosystems Engineering</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Biosystems Engineering</style></full-title></periodical><pages end="361" start="355">355-361</pages><volume><style face="normal" font="default">33</style></volume><number><style face="normal" font="default">5</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">spectral</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil strength</style></keyword><keyword><style face="normal" font="default"> strength</style></keyword><keyword><style face="normal" font="default"> sensor</style></keyword></keywords><dates><year Day="0" Month="0" Year="2008">2008</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0397-chung.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>445</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Evans,R.G.</style></author><author><style face="normal" font="default"> Sadler,E.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Methods and technologies to improve efficiency of water use</style></title><secondary-title><style face="normal" font="default">Water Resources Research</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Water Resources Research</style></full-title></periodical><pages end="" start="W00E04">W00E04-</pages><volume><style face="normal" font="default">44</style></volume><number><style face="normal" font="default">7</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">METHODS</style></keyword><keyword><style face="normal" font="default"> technology</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> water use</style></keyword><keyword><style face="normal" font="default"> WATER-USE</style></keyword><keyword><style face="normal" font="default"> research</style></keyword></keywords><dates><year Day="0" Month="0" Year="2008">2008</year></dates><urls><pdf-urls><url ppv-ref="no">http://ddr.nal.usda.gov/handle/10113/21462#</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>400</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Hezel,Linda</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Healing and building soil on Prairie Birthday Farm</style></title><secondary-title><style face="normal" font="default">Missouri Prairie Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Missouri Prairie Journal</style></full-title></periodical><pages end="20" start="14">14-20</pages><volume><style face="normal" font="default">29</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">soil</style></keyword></keywords><dates><year Day="0" Month="0" Year="2008">2008</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0400-hezel.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>423</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Hoilett,N.O.</style></author><author><style face="normal" font="default"> Nkongolo,M.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Eivazi,F.</style></author><author><style face="normal" font="default"> Adisa,S.J.</style></author><author><style face="normal" font="default"> Paro,R.M.</style></author><author><style face="normal" font="default"> Schmidt,K</style></author></authors></contributors><titles><title><style face="normal" font="default">Understanding the relationships between microbial biomass, enzymes and greenhouse gas efflux in a secondary forest in Missouri</style></title><secondary-title><style face="normal" font="default">Journal of Environmental Monitoring</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Environmental Monitoring</style></full-title></periodical><pages end="118" start="109">109-118</pages><volume><style face="normal" font="default">5</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">MICROBIAL BIOMASS</style></keyword><keyword><style face="normal" font="default"> biomass</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword></keywords><dates><year Day="0" Month="0" Year="2008">2008</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0423-hoilett.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>394</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Holan,S.</style></author><author><style face="normal" font="default"> Wang,S.</style></author><author><style face="normal" font="default"> Arab,A.</style></author><author><style face="normal" font="default"> Sadler,E.J.</style></author><author><style face="normal" font="default"> Stone,K.C.</style></author></authors></contributors><titles><title><style face="normal" font="TeX-Times-Bold">Semiparametric Geographically Weighted Response Curves with Application to Site-Specific Agriculture</style></title><secondary-title><style face="normal" font="default">Journal of Agricultural Biological and Environmental Statistics</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Agricultural Biological and Environmental Statistics</style></full-title></periodical><pages end="439" start="424">424-439</pages><volume><style face="normal" font="default">13</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">site-specific</style></keyword><keyword><style face="normal" font="default"> site-specific agriculture</style></keyword><keyword><style face="normal" font="default"> statistics</style></keyword></keywords><dates><year Day="0" Month="0" Year="2008">2008</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0394-holan.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>405</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Jiang,P.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Anderson,S.H.</style></author><author><style face="normal" font="default"> Sadler,E.J.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Estimating Plant-Available Water Using the Simple Inverse Yield Model for Claypan Landscapes</style></title><secondary-title><style face="normal" font="default">Agronomy Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Agronomy Journal</style></full-title></periodical><pages end="836" start="830">830-836</pages><volume><style face="normal" font="default">100</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">landscapes</style></keyword><keyword><style face="normal" font="default"> MODEL</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword></keywords><dates><year Day="0" Month="0" Year="2008">2008</year></dates><urls><pdf-urls><url ppv-ref="no">http://ddr.nal.usda.gov/bitstream/10113/18491/1/IND44069196.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>399</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Jung,W.K.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Contrasting grain crop and grassland management effects on soil quality properties for a north-central Missouri claypan soil landscape.</style></title><secondary-title><style face="normal" font="default">Soil Science and Plant Nutrition</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil Science and Plant Nutrition</style></full-title></periodical><pages end="971" start="960">960-971</pages><volume><style face="normal" font="default">54</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">GRAIN</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil quality</style></keyword><keyword><style face="normal" font="default"> QUALITY</style></keyword><keyword><style face="normal" font="default"> NORTH-CENTRAL MISSOURI</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword></keywords><dates><year Day="0" Month="0" Year="2008">2008</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0399-jung.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>318</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kitchen,N.R.</style></author></authors></contributors><titles><title><style face="normal" font="Caecilia-Heavy">Emerging technologies for real-time and integrated agriculture decisions</style></title><secondary-title><style face="normal" font="default">Computers and Electronics in Agriculture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Computers and Electronics in Agriculture</style></full-title></periodical><pages end="3" start="1">1-3</pages><volume><style face="normal" font="default">61</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">real-time</style></keyword><keyword><style face="normal" font="default"> technology</style></keyword></keywords><dates><year Day="0" Month="0" Year="2008">2008</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0318-kitchen.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>412</rec-number><ref-type name="Book Chapter">3</ref-type><contributors><authors><author><style face="normal" font="default">Kitchen,N.R.</style></author><author><style face="normal" font="default"> Goulding,K.W.T.</style></author><author><style face="normal" font="default"> Shanahan,J.F.</style></author></authors><secondary-authors><author><style face="normal" font="default">Hatfield,J.L.</style></author><author><style face="normal" font="default"> Follett,R.F.</style></author></secondary-authors></contributors><titles><title><style face="normal" font="default">Proven practices and innovative technologies for on-farm crop nitrogen management</style></title><alt-title><style face="normal" font="default">Nitrogen in the environment : sources, problems, and management</style></alt-title></titles><periodical/><pages end="517" start="483">483-517</pages><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">technology</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> environment</style></keyword></keywords><dates><year Day="0" Month="0" Year="2008">2008</year></dates><publisher><style face="normal" font="default">Academic Press/Elsevier</style></publisher><urls><pdf-urls><url ppv-ref="no">http://hdl.handle.net/10113/19176</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>398</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lee,K.S.</style></author><author><style face="normal" font="default"> Lee,D.H.</style></author><author><style face="normal" font="default"> Jung,I.K.</style></author><author><style face="normal" font="default"> Chung,S.O.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Sampling and calibration requirements for optical reflectance soil property sensors for Korean paddy soils.</style></title><secondary-title><style face="normal" font="default">Journal of Biosystems Engineering</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Biosystems Engineering</style></full-title></periodical><pages end="268" start="260">260-268</pages><volume><style face="normal" font="default">33</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">sampling</style></keyword><keyword><style face="normal" font="default"> calibration</style></keyword><keyword><style face="normal" font="default"> reflectance</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil properties</style></keyword><keyword><style face="normal" font="default"> sensors</style></keyword><keyword><style face="normal" font="default"> sensor</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword></keywords><dates><year Day="0" Month="0" Year="2008">2008</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0398-lee.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>407</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lerch,R.N.</style></author><author><style face="normal" font="default"> Sadler,E.J.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Myers,D.B.</style></author><author><style face="normal" font="default"> Baffaut,C.</style></author><author><style face="normal" font="default"> Anderson,S.H.</style></author><author><style face="normal" font="default"> Lin,C.H.</style></author></authors></contributors><titles><title><style face="normal" font="default">Overview of the Mark Twain Lake/Salt River Basin Conservation Effects Assessment Project</style></title><secondary-title><style face="normal" font="default">Journal of Soil and Water Conservation</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Soil and Water Conservation</style></full-title></periodical><pages end="359" start="345">345-359</pages><volume><style face="normal" font="default">63</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">BASIN</style></keyword><keyword><style face="normal" font="default"> RIVER</style></keyword></keywords><dates><year Day="0" Month="0" Year="2008">2008</year></dates><urls><pdf-urls><url ppv-ref="no">http://ddr.nal.usda.gov/bitstream/10113/22591/1/IND44146865.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>383</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lin,C.H.</style></author><author><style face="normal" font="default"> Lerch,R.N.</style></author><author><style face="normal" font="default"> Garrett,H.E.</style></author><author><style face="normal" font="default"> George,M.F.</style></author></authors></contributors><titles><title><style face="normal" font="default">Bioremediation of Atrazine-Contaminated Soil by Forage Grasses: Transformation, Uptake, and Detoxification.</style></title><secondary-title><style face="normal" font="default">Journal of Environmental Quality</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Environmental Quality</style></full-title></periodical><pages end="206" start="196">196-206</pages><volume><style face="normal" font="default">37</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">soil</style></keyword><keyword><style face="normal" font="default"> forage</style></keyword></keywords><dates><year Day="0" Month="0" Year="2008">2008</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0383-lin.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>316</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Massey,R.</style></author><author><style face="normal" font="default"> Myers,D.B.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author></authors></contributors><titles><title><style face="normal" font="GillSansMT">Profitability Maps as an Input for Site-Specific Management Decision Making</style></title><secondary-title><style face="normal" font="default">Agronomy Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Agronomy Journal</style></full-title></periodical><pages end="59" start="52">52-59</pages><volume><style face="normal" font="default">100</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">maps</style></keyword><keyword><style face="normal" font="default"> site-specific</style></keyword><keyword><style face="normal" font="default"> site-specific management</style></keyword><keyword><style face="normal" font="default"> site specific management</style></keyword><keyword><style face="normal" font="default"> management</style></keyword></keywords><dates><year Day="0" Month="0" Year="2008">2008</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0316-massey.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>417</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Richardson,C.W.</style></author><author><style face="normal" font="default"> Bucks,D.A.</style></author><author><style face="normal" font="default"> Sadler,E.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">The Conservation Effects Assessment Project benchmark watersheds: Synthesis of preliminary findings</style></title><secondary-title><style face="normal" font="default">Journal of Soil and Water Conservation</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Soil and Water Conservation</style></full-title></periodical><pages end="604" start="590">590-604</pages><volume><style face="normal" font="default">63</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">watersheds</style></keyword><keyword><style face="normal" font="default"> watershed</style></keyword></keywords><dates><year Day="0" Month="0" Year="2008">2008</year></dates><urls><pdf-urls><url ppv-ref="no">http://hdl.handle.net/10113/22767</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>416</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Sadler,E.J.</style></author><author><style face="normal" font="default"> Steiner,E.J.</style></author><author><style face="normal" font="default"> Chen,J.S.</style></author><author><style face="normal" font="default"> Wilson,G.</style></author><author><style face="normal" font="default"> Ross,J.D.</style></author><author><style face="normal" font="default"> Oster,T.</style></author><author><style face="normal" font="default"> James,D.</style></author><author><style face="normal" font="default"> Vandenberg,B.</style></author><author><style face="normal" font="default"> Cole,K.</style></author><author><style face="normal" font="default"> Hatfield,J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Sustaining the Earth's Watersheds-Agricultural Research Data System: Data development, user interaction, and operations management.</style></title><secondary-title><style face="normal" font="default">Journal of Soil and Water Conservation</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Soil and Water Conservation</style></full-title></periodical><pages end="589" start="577">577-589</pages><volume><style face="normal" font="default">63</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">research</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> management</style></keyword></keywords><dates><year Day="0" Month="0" Year="2008">2008</year></dates><urls><pdf-urls><url ppv-ref="no">http://hdl.handle.net/10113/22766</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>420</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Shanahan,J.F.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Raun,W.R.</style></author><author><style face="normal" font="default"> Schepers,J.S.</style></author></authors></contributors><titles><title><style face="normal" font="default">Responsive in-season nitrogen management for cereals</style></title><secondary-title><style face="normal" font="default">Computers and Electronics in Agriculture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Computers and Electronics in Agriculture</style></full-title></periodical><pages end="62" start="51">51-62</pages><volume><style face="normal" font="default">61</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">management</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword></keywords><dates><year Day="0" Month="0" Year="2008">2008</year></dates><urls><pdf-urls><url ppv-ref="no">http://hdl.handle.net/10113/15637</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>440</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Steiner,J.L.</style></author><author><style face="normal" font="default"> Sadler,E.J.</style></author><author><style face="normal" font="default"> Chen,J.S.</style></author><author><style face="normal" font="default"> Wilson,G.</style></author><author><style face="normal" font="default"> James,D.</style></author><author><style face="normal" font="default"> Vandenberg,B.</style></author><author><style face="normal" font="default"> Ross,J.D.</style></author><author><style face="normal" font="default"> Oster,T.</style></author></authors></contributors><titles><title><style face="normal" font="default">Sustaining the Earth's Watersheds-Agricultural Research Watershed Data System: Overview</style></title><secondary-title><style face="normal" font="default">Journal of Soil and Water Conservation</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Soil and Water Conservation</style></full-title></periodical><pages end="576" start="569">569-576</pages><volume><style face="normal" font="default">63</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">research</style></keyword><keyword><style face="normal" font="default"> watershed</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword></keywords><dates><year Day="0" Month="0" Year="2008">2008</year></dates><urls><pdf-urls><url ppv-ref="no">http://hdl.handle.net/10113/22765</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>483</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Stevens,G.</style></author><author><style face="normal" font="default"> Wrather,A.</style></author><author><style face="normal" font="default"> Rhine,M.</style></author><author><style face="normal" font="default"> Vories,E.D.</style></author><author><style face="normal" font="default"> Dunn,D.</style></author></authors></contributors><titles><title><style face="normal" font="default">Predicting rice yield response to midseason nitrogen with plant area measurements. Agron. J. 100(2):387-392. 2008.</style></title><secondary-title><style face="normal" font="default">Agronomy Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Agronomy Journal</style></full-title></periodical><pages end="" start="387-392">387-392-</pages><volume><style face="normal" font="default">100</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">RICE</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> YIELD RESPONSE</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> area</style></keyword><keyword><style face="normal" font="default"> measurement</style></keyword></keywords><dates><year Day="0" Month="0" Year="2008">2008</year></dates><urls><pdf-urls><url ppv-ref="no">http://hdl.handle.net/10113/17558</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>371</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Sudduth,K.A.</style></author><author><style face="normal" font="default"> Chung,S.O.</style></author><author><style face="normal" font="default"> Andrade-Sanchez,P.</style></author><author><style face="normal" font="default"> Upadhyaya,S.K.</style></author></authors></contributors><titles><title><style face="normal" font="default">Field comparison of two prototype soil strength profile sensors</style></title><secondary-title><style face="normal" font="default">Computers and Electronics in Agriculture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Computers and Electronics in Agriculture</style></full-title></periodical><pages end="31" start="20">20-31</pages><volume><style face="normal" font="default">61</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">FIELD</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil strength</style></keyword><keyword><style face="normal" font="default"> strength</style></keyword><keyword><style face="normal" font="default"> sensors</style></keyword><keyword><style face="normal" font="default"> sensor</style></keyword></keywords><dates><year Day="0" Month="0" Year="2008">2008</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0371-sudduth.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>373</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Udawatta,R.P.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Adamson,B.W.</style></author><author><style face="normal" font="default"> Anderson,S.H.</style></author><author><style face="normal" font="default"> .</style></author></authors></contributors><titles><title><style face="normal" font="default">Variations in soil aggregate stability and enzyme activities in a temperate agroforestry practice</style></title><secondary-title><style face="normal" font="default">Applied Soil Ecology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Applied Soil Ecology</style></full-title></periodical><pages end="160" start="153">153-160</pages><volume><style face="normal" font="default">39</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">variation</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> AGGREGATE STABILITY</style></keyword><keyword><style face="normal" font="default"> ENZYME-ACTIVITIES</style></keyword></keywords><dates><year Day="0" Month="0" Year="2008">2008</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0373-udawatta.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>485</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Wrather,J.A.</style></author><author><style face="normal" font="default"> Phipps,B.J.</style></author><author><style face="normal" font="default"> Stevens,W.E.</style></author><author><style face="normal" font="default"> Phillips,A.S.</style></author><author><style face="normal" font="default"> Vories,E.D.</style></author></authors></contributors><titles><title><style face="normal" font="default">Cotton planting date and plant population effects on yield and fiber quality in the Mississippi delta.</style></title><secondary-title><style face="normal" font="default">Journal of Cotton Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Cotton Science</style></full-title></periodical><pages end="7" start="1">1-7</pages><volume><style face="normal" font="default">12</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">cotton</style></keyword><keyword><style face="normal" font="default"> planting</style></keyword><keyword><style face="normal" font="default"> planting date</style></keyword><keyword><style face="normal" font="default"> DATE</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> PLANT-POPULATION</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> FIBER</style></keyword><keyword><style face="normal" font="default"> fiber quality</style></keyword><keyword><style face="normal" font="default"> QUALITY</style></keyword></keywords><dates><year Day="0" Month="0" Year="2008">2008</year></dates><urls><pdf-urls><url ppv-ref="no">http://hdl.handle.net/10113/18637</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>486</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Bajwa,S.G.</style></author><author><style face="normal" font="default"> Vories,E.D.</style></author></authors></contributors><titles><title><style face="normal" font="default">Spatial analysis of cotton (Gossypium hirsutum L.) canopy responses to irrigation in a moderately humid area. Irrig. Sci. 25(4):429-441.</style></title><secondary-title><style face="normal" font="default">Irrigation Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Irrigation Science</style></full-title></periodical><pages end="441" start="429">429-441</pages><volume><style face="normal" font="default">25</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">SPATIAL-ANALYSIS</style></keyword><keyword><style face="normal" font="default"> analysis</style></keyword><keyword><style face="normal" font="default"> cotton</style></keyword><keyword><style face="normal" font="default"> Gossypium</style></keyword><keyword><style face="normal" font="default"> Gossypium hirsutum</style></keyword><keyword><style face="normal" font="default"> canopy</style></keyword><keyword><style face="normal" font="default"> irrigation</style></keyword><keyword><style face="normal" font="default"> area</style></keyword></keywords><dates><year Day="0" Month="0" Year="2007">2007</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.springerlink.com/content/nx774v0j860m144v/fulltext.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>329</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Bullock,D.S.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Bullock,D.G.</style></author></authors></contributors><titles><title><style face="normal" font="default">Multi-disciplinary teams-a necessity for research in precision agriculture systems</style></title><secondary-title><style face="normal" font="default">Crop Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Crop Science</style></full-title></periodical><pages end="1769" start="1765">1765-1769</pages><volume><style face="normal" font="default">47</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">precision agriculture</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> SYSTEMS</style></keyword></keywords><dates><year Day="0" Month="0" Year="2007">2007</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0329-211892.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>321</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Control of both winter annual and summer annual weeds in no-till corn with between-row mowing systems</style></title><secondary-title><style face="normal" font="default">Weed Technology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Technology</style></full-title></periodical><pages end="601" start="591">591-601</pages><volume><style face="normal" font="default">21</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">corn</style></keyword><keyword><style face="normal" font="default"> mowing</style></keyword><keyword><style face="normal" font="default"> no-till</style></keyword><keyword><style face="normal" font="default"> summer</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> SYSTEMS</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> WEEDS</style></keyword><keyword><style face="normal" font="default"> WINTER</style></keyword></keywords><dates><year Day="0" Month="0" Year="2007">2007</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0321-185953.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>313</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Between-row mowing systems control summer annual weeds in no-till grain sorghum</style></title><secondary-title><style face="normal" font="default">Weed Technology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Technology</style></full-title></periodical><pages end="517" start="511">511-517</pages><volume><style face="normal" font="default">21</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">GRAIN</style></keyword><keyword><style face="normal" font="default"> mowing</style></keyword><keyword><style face="normal" font="default"> no-till</style></keyword><keyword><style face="normal" font="default"> summer</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> SYSTEMS</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> WEEDS</style></keyword></keywords><dates><year Day="0" Month="0" Year="2007">2007</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0313-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>322</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Fang,M.</style></author><author><style face="normal" font="default"> Motavalli,P.P.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Nelson,K.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Assessing changes in soil microbial communities and carbon mineralization in bt and non-bt corn residue-amended soils</style></title><secondary-title><style face="normal" font="default">Applied Soil Ecology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Applied Soil Ecology</style></full-title></periodical><pages end="160" start="150">150-160</pages><volume><style face="normal" font="default">37</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">soil</style></keyword><keyword><style face="normal" font="default"> carbon</style></keyword><keyword><style face="normal" font="default"> mineralization</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword></keywords><dates><year Day="0" Month="0" Year="2007">2007</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0322-214010.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>330</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Hong,N.</style></author><author><style face="normal" font="default"> Scharf,P.C.</style></author><author><style face="normal" font="default"> Davis,J.G.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Economically optimal nitrogen rate reduces soil residual nitrate</style></title><secondary-title><style face="normal" font="default">Journal of Environmental Quality</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Environmental Quality</style></full-title></periodical><pages end="362" start="354">354-362</pages><volume><style face="normal" font="default">36</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">nitrogen</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> NITRATE</style></keyword></keywords><dates><year Day="0" Month="0" Year="2007">2007</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0330-195693.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>315</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Jiang P.</style></author><author><style face="normal" font="default"> Anderson S.H.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Sadler,E.J.</style></author></authors></contributors><titles><title><style face="normal" font="Optima-Bold">Estimating Plant-Available Water Capacity for Claypan Landscapes Using Apparent Electrical Conductivity</style></title><secondary-title><style face="normal" font="default">Soil Science Society of America Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil Science Society of America Journal</style></full-title></periodical><pages end="1908" start="1902">1902-1908</pages><volume><style face="normal" font="default">71</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">water</style></keyword><keyword><style face="normal" font="default"> CAPACITY</style></keyword><keyword><style face="normal" font="default"> landscapes</style></keyword></keywords><dates><year Day="0" Month="0" Year="2007">2007</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0315-jiang.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>323</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Jiang,P.</style></author><author><style face="normal" font="default"> Anderson,S.H.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Sadler,E.J.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Landscape and conservation management effects on hydraulic properties on a claypan-soil toposequence</style></title><secondary-title><style face="normal" font="default">Soil Science Society of America Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil Science Society of America Journal</style></full-title></periodical><pages end="811" start="803">803-811</pages><volume><style face="normal" font="default">71</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">management</style></keyword></keywords><dates><year Day="0" Month="0" Year="2007">2007</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0323-197468.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>319</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Jung,W.K.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Anderson,S.H.</style></author><author><style face="normal" font="default"> Sadler,E.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Crop management effects on water infiltration for claypan soils</style></title><secondary-title><style face="normal" font="default">Journal of Soil and Water Conservation</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Soil and Water Conservation</style></full-title></periodical><pages end="63" start="55">55-63</pages><volume><style face="normal" font="default">62</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">CROP</style></keyword><keyword><style face="normal" font="default"> crop management</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> infiltration</style></keyword><keyword><style face="normal" font="default"> claypan soils</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword></keywords><dates><year Day="0" Month="0" Year="2007">2007</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0319-jung.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>293</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kim,H.J.</style></author><author><style face="normal" font="default"> Hummel,J.W.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Birrell,S.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Evaluation of phosphate ion-selective membranes and cobalt-based electrodes for soil nutrient sensing</style></title><secondary-title><style face="normal" font="default">Transactions of the ASABE</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the ASABE</style></full-title></periodical><pages end="425" start="415">415-425</pages><volume><style face="normal" font="default">50</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">evaluation</style></keyword><keyword><style face="normal" font="default"> PHOSPHATE</style></keyword><keyword><style face="normal" font="default"> membrane</style></keyword><keyword><style face="normal" font="default"> ELECTRODES</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> sensing</style></keyword></keywords><dates><year Day="0" Month="0" Year="2007">2007</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0293-201375.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>324</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kim,H.J.</style></author><author><style face="normal" font="default"> Hummel,J.W.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Motavalli,P.P.</style></author></authors></contributors><titles><title><style face="normal" font="default">Simultaneous analysis of soil macronutrients using ion-selective electrodes</style></title><secondary-title><style face="normal" font="default">Soil Science Society of America Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil Science Society of America Journal</style></full-title></periodical><pages end="1877" start="1867">1867-1877</pages><volume><style face="normal" font="default">71</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">ELECTRODES</style></keyword><keyword><style face="normal" font="default"> ION-SELECTIVE ELECTRODE</style></keyword><keyword><style face="normal" font="default"> ION-SELECTIVE ELECTRODES</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword></keywords><dates><year Day="0" Month="0" Year="2007">2007</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0324-406667.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>326</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lerch,R.N.</style></author><author><style face="normal" font="default"> Lin,C.H.</style></author><author><style face="normal" font="default"> Leigh,N.D.</style></author></authors></contributors><titles><title><style face="normal" font="default">Reaction pathways of the diketonitrile degradate of isoxaflutole with hypochlorite in water</style></title><secondary-title><style face="normal" font="default">Journal of Agricultural and Food Chemistry</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Agricultural and Food Chemistry</style></full-title></periodical><pages end="1899" start="1893">1893-1899</pages><volume><style face="normal" font="default">55</style></volume><number><style face="normal" font="default">5</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">diketonitrile</style></keyword><keyword><style face="normal" font="default"> hypochlorite</style></keyword><keyword><style face="normal" font="default"> isoxaflutole</style></keyword><keyword><style face="normal" font="default"> water</style></keyword></keywords><dates><year Day="0" Month="0" Year="2007">2007</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0326-201114.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>327</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lin,C.H.</style></author><author><style face="normal" font="default"> Lerch,R.N.</style></author><author><style face="normal" font="default"> Garrett,H.E.</style></author><author><style face="normal" font="default"> Yong-Xi,L.</style></author><author><style face="normal" font="default"> George,M.F.</style></author></authors></contributors><titles><title><style face="normal" font="default">An improved HPLC-MS/MS method for determination of isoxaflutole (Balance) and its metabolites in soils and forage plants</style></title><secondary-title><style face="normal" font="default">Journal of Agricultural and Food Chemistry</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Agricultural and Food Chemistry</style></full-title></periodical><pages end="3815" start="3805">3805-3815</pages><volume><style face="normal" font="default">55</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">determination</style></keyword><keyword><style face="normal" font="default"> forage</style></keyword><keyword><style face="normal" font="default"> HPLC-MS/MS</style></keyword><keyword><style face="normal" font="default"> isoxaflutole</style></keyword><keyword><style face="normal" font="default"> metabolites</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> PLANTS</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword></keywords><dates><year Day="0" Month="0" Year="2007">2007</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0327-205120.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>385</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lin,C.H.</style></author><author><style face="normal" font="default"> Lerch,R.N.</style></author><author><style face="normal" font="default"> Garrett,H.E.</style></author><author><style face="normal" font="default"> Jordan,D.</style></author><author><style face="normal" font="default"> George,M.F.</style></author></authors></contributors><titles><title><style face="normal" font="default">Improved GC-MS/MS Method for Determination of  Atrazine and Its Chlorinated Metabolites in Forage Plants - Laboratory and Field Experiments.</style></title><secondary-title><style face="normal" font="default">Communications in Soil Science and Plant Analysis</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Communications in Soil Science and Plant Analysis</style></full-title></periodical><pages end="1773" start="1753">1753-1773</pages><volume><style face="normal" font="default">38</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">forage</style></keyword><keyword><style face="normal" font="default"> atrazine</style></keyword><keyword><style face="normal" font="default"> isoxaflutole</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> groundwater</style></keyword><keyword><style face="normal" font="default"> determination</style></keyword><keyword><style face="normal" font="default"> metabolites</style></keyword><keyword><style face="normal" font="default"> PLANTS</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> FIELD EXPERIMENTS</style></keyword></keywords><dates><year Day="0" Month="0" Year="2007">2007</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0385-lin.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>384</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lin,C.H.</style></author><author><style face="normal" font="default"> Lerch,R.N.</style></author><author><style face="normal" font="default"> Garrett,H.E.</style></author><author><style face="normal" font="default"> Jordan,D.</style></author><author><style face="normal" font="default"> George,M.F.</style></author></authors></contributors><titles><title><style face="normal" font="default">Ability of Forage Grasses Exposed to Atrazine and Isoxaflutole to Reduce Nutrient Levels in Soils and Shallow Groundwater.</style></title><secondary-title><style face="normal" font="default">Communications in Soil Science and Plant Analysis</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Communications in Soil Science and Plant Analysis</style></full-title></periodical><pages end="1136" start="1119">1119-1136</pages><volume><style face="normal" font="default">38</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">forage</style></keyword><keyword><style face="normal" font="default"> atrazine</style></keyword><keyword><style face="normal" font="default"> isoxaflutole</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> groundwater</style></keyword></keywords><dates><year Day="0" Month="0" Year="2007">2007</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0384-lin.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>375</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Means,N.E.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Influence of soil moisture on root colonization of glyphosate-treated soybean by Fusarium species.</style></title><secondary-title><style face="normal" font="default">Communications in Soil Science and Plant Analysis</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Communications in Soil Science and Plant Analysis</style></full-title></periodical><pages end="1720" start="1713">1713-1720</pages><volume><style face="normal" font="default">38</style></volume><number><style face="normal" font="default">13</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">soil</style></keyword><keyword><style face="normal" font="default"> soil moisture</style></keyword><keyword><style face="normal" font="default"> SOIL-MOISTURE</style></keyword><keyword><style face="normal" font="default"> MOISTURE</style></keyword><keyword><style face="normal" font="default"> ROOT</style></keyword><keyword><style face="normal" font="default"> colonization</style></keyword><keyword><style face="normal" font="default"> soybean</style></keyword><keyword><style face="normal" font="default"> species</style></keyword></keywords><dates><year Day="0" Month="0" Year="2007">2007</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0375-means.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>374</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Means,N.E.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Ramsier,C.</style></author></authors></contributors><titles><title><style face="normal" font="default">Effects of glyphosate and foliar amendments on activity of microorganisms in the soybean rhizosphere</style></title><secondary-title><style face="normal" font="default">Journal of Environmental Science and Health Part B</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Environmental Science and Health Part B</style></full-title></periodical><pages end="132" start="125">125-132</pages><volume><style face="normal" font="default">42</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">glyphosate</style></keyword><keyword><style face="normal" font="default"> MICROORGANISMS</style></keyword><keyword><style face="normal" font="default"> soybean</style></keyword><keyword><style face="normal" font="default"> rhizosphere</style></keyword></keywords><dates><year Day="0" Month="0" Year="2007">2007</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0374-means.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>317</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Myers,D.B.</style></author><author><style face="normal" font="default"> Kitchen,N.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Sharp,R.E.</style></author><author><style face="normal" font="default"> Miles,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="BemboStd-Bold">Soybean Root Distribution Related to Claypan Soil Properties and Apparent Soil Electrical Conductivity</style></title><secondary-title><style face="normal" font="default">Crop Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Crop Science</style></full-title></periodical><pages end="1509" start="1498">1498-1509</pages><volume><style face="normal" font="default">47</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">distribution</style></keyword><keyword><style face="normal" font="default"> ROOT</style></keyword><keyword><style face="normal" font="default"> root distribution</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil properties</style></keyword><keyword><style face="normal" font="default"> soybean</style></keyword></keywords><dates><year Day="0" Month="0" Year="2007">2007</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0317-myers.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>376</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Nasraoui,B.</style></author><author><style face="normal" font="default"> Hajlaoui,M.R.</style></author><author><style face="normal" font="default"> Aissa,A.D.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Biological control of wheat take-all disease: I - Characterization of antagonistic bacteria from diverse soils toward </style><style face="italic" font="default">Gaeumannomyces graminis</style><style face="normal" font="default"> var. </style><style face="italic" font="default">tritici</style><style face="normal" font="default"> (Ggt)</style></title><secondary-title><style face="normal" font="default">Tunisian Journal of Plant Protection</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Tunisian Journal of Plant Protection</style></full-title></periodical><pages end="34" start="23">23-34</pages><volume><style face="normal" font="default">2</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">biological control</style></keyword><keyword><style face="normal" font="default"> BIOLOGICAL-CONTROL</style></keyword><keyword><style face="normal" font="default"> WHEAT</style></keyword><keyword><style face="normal" font="default"> DISEASE</style></keyword><keyword><style face="normal" font="default"> characterization</style></keyword><keyword><style face="normal" font="default"> BACTERIA</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword></keywords><dates><year Day="0" Month="0" Year="2007">2007</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0376-nasraoui.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>377</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Nasraoui,B.</style></author><author><style face="normal" font="default"> Hajlaoui,M.R.</style></author><author><style face="normal" font="default"> Gargouri,S.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Biological control of wheat take-all disease: II - Rapid screening for selection of bacteria suppressive to </style><style face="italic" font="default">Gaeumannomyces graminis</style><style face="normal" font="default"> var. </style><style face="italic" font="default">tritici</style><style face="normal" font="default"> (Ggt) in laboratory with greenhouse and field trials</style></title><secondary-title><style face="normal" font="default">Tunisian Journal of Plant Protection</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Tunisian Journal of Plant Protection</style></full-title></periodical><pages end="46" start="35">35-46</pages><volume><style face="normal" font="default">2</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">biological control</style></keyword><keyword><style face="normal" font="default"> BIOLOGICAL-CONTROL</style></keyword><keyword><style face="normal" font="default"> WHEAT</style></keyword><keyword><style face="normal" font="default"> DISEASE</style></keyword><keyword><style face="normal" font="default"> SELECTION</style></keyword><keyword><style face="normal" font="default"> BACTERIA</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword></keywords><dates><year Day="0" Month="0" Year="2007">2007</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0377-nasraoui.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>378</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Park,K.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Effects of a biological amendment on chemical and biological properties and microbial diversity in soils receiving different organic amendments</style></title><secondary-title><style face="normal" font="default">Korean Journal of Soil Science and Fertilizer</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Korean Journal of Soil Science and Fertilizer</style></full-title></periodical><pages end="241" start="234">234-241</pages><volume><style face="normal" font="default">40</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">DIVERSITY</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword></keywords><dates><year Day="0" Month="0" Year="2007">2007</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0378-park.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>328</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Pengthamkeerati,P.</style></author><author><style face="normal" font="default"> Motavalli,P.P.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Anderson S.H.</style></author></authors></contributors><titles><title><style face="normal" font="default">Soil compaction and poultry litter effects on factors affecting nitrogen availability in a claypan soil</style></title><secondary-title><style face="normal" font="default">Soil &amp; Tillage Research</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil &amp; Tillage Research</style></full-title></periodical><pages end="119" start="109">109-119</pages><volume><style face="normal" font="default">91</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">AVAILABILITY</style></keyword><keyword><style face="normal" font="default"> compaction</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil compaction</style></keyword></keywords><dates><year Day="0" Month="0" Year="2007">2007</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0328-207290.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>314</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Sadler,E.J.</style></author><author><style face="normal" font="default"> Jones,J.W.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Modeling for precision agriculture: how good is good enough, and how can we tell?</style></title><secondary-title><style face="normal" font="default">Precision Agriculture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Precision Agriculture</style></full-title></periodical><pages end="248" start="241">241-248</pages><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">MODELING</style></keyword><keyword><style face="normal" font="default"> precision agriculture</style></keyword></keywords><dates><year Day="0" Month="0" Year="2007">2007</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0314-sadler.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>305</rec-number><ref-type name="Book Chapter">3</ref-type><contributors><authors><author><style face="normal" font="default">Sadler,E.J.</style></author><author><style face="normal" font="default"> Camp,C.R.</style></author><author><style face="normal" font="default"> Evans,R.G.</style></author></authors><secondary-authors><author><style face="normal" font="default">Lascano,R.J.</style></author><author><style face="normal" font="default"> Soyka,R.E.</style></author></secondary-authors></contributors><titles><title><style face="normal" font="default">New and Future Technology</style></title><alt-title><style face="normal" font="default">Irrigation of Agricultural Crops</style></alt-title></titles><periodical/><pages end="626" start="609">609-626</pages><volume><style face="normal" font="default">2nd</style></volume><number><style face="normal" font="default">16</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">technology</style></keyword><keyword><style face="normal" font="default"> irrigation</style></keyword><keyword><style face="normal" font="default"> crops</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword></keywords><dates><year Day="0" Month="0" Year="2007">2007</year></dates><pub-location><style face="normal" font="default">Madison, Wisconsin</style></pub-location><publisher><style face="normal" font="default">American Society of Agronomy</style></publisher><isbn><style face="normal" font="default">978-0-89118-162-0</style></isbn><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0305-157334.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>487</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Smith,M.C.</style></author><author><style face="normal" font="default"> Massey,J.H.</style></author><author><style face="normal" font="default"> Branson,J.</style></author><author><style face="normal" font="default"> Epting,J.</style></author><author><style face="normal" font="default"> Pennington,D.</style></author><author><style face="normal" font="default"> Tacker,P.L.</style></author><author><style face="normal" font="default"> Thomas,J.</style></author><author><style face="normal" font="default"> Vories,E.D.</style></author><author><style face="normal" font="default"> Wilson,C.</style></author></authors></contributors><titles><title><style face="normal" font="default">Water use estimates for various rice production systems in Mississippi and Arkansas. Irrig. Sci. 25(2):141-147.</style></title><secondary-title><style face="normal" font="default">Irrigation Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Irrigation Science</style></full-title></periodical><pages end="147" start="141">141-147</pages><volume><style face="normal" font="default">25</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">water</style></keyword><keyword><style face="normal" font="default"> water use</style></keyword><keyword><style face="normal" font="default"> WATER-USE</style></keyword><keyword><style face="normal" font="default"> RICE</style></keyword><keyword><style face="normal" font="default"> SYSTEMS</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword></keywords><dates><year Day="0" Month="0" Year="2007">2007</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.springerlink.com/content/r300t75n7l34h074/fulltext.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>488</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Stevens,W.</style></author><author><style face="normal" font="default"> Vories,E.D.</style></author><author><style face="normal" font="default"> Mulesky,M.</style></author><author><style face="normal" font="default"> Rhine,M.</style></author><author><style face="normal" font="default"> Dunn,D.</style></author></authors></contributors><titles><title><style face="normal" font="default">Irrigation to maximize vaccine antigen production in genetically modified tobacco.</style></title><secondary-title><style face="normal" font="default">Agronomy Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Agronomy Journal</style></full-title></periodical><pages end="1277" start="1271">1271-1277</pages><volume><style face="normal" font="default">99</style></volume><number><style face="normal" font="default">5</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">irrigation</style></keyword></keywords><dates><year Day="0" Month="0" Year="2007">2007</year></dates><urls><pdf-urls><url ppv-ref="no">http://hdl.handle.net/10113/13148</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>372</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Sudduth,K.A.</style></author><author><style face="normal" font="default"> Drummond,S.T.</style></author></authors></contributors><titles><title><style face="normal" font="default">Yield editor: Software for removing errors from crop yield maps</style></title><secondary-title><style face="normal" font="default">Agronomy Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Agronomy Journal</style></full-title></periodical><pages end="1482" start="1479">1479-1482</pages><volume><style face="normal" font="default">99</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">YIELD</style></keyword><keyword><style face="normal" font="default"> errors</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> crop yield</style></keyword><keyword><style face="normal" font="default"> yield map</style></keyword><keyword><style face="normal" font="default"> maps</style></keyword></keywords><dates><year Day="0" Month="0" Year="2007">2007</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0372-sudduth.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>493</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Vories,E.D.</style></author><author><style face="normal" font="default"> Hogan,R.</style></author><author><style face="normal" font="default"> Tacker,P.L.</style></author><author><style face="normal" font="default"> Glover,R.E.</style></author><author><style face="normal" font="default"> Lancaster,S.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Estimating the impact of delaying irrigation for Midsouth cotton on clay soil.</style></title><secondary-title><style face="normal" font="default">Transactions of the ASABE</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the ASABE</style></full-title></periodical><pages end="937" start="929">929-937</pages><volume><style face="normal" font="default">50</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">IMPACT</style></keyword><keyword><style face="normal" font="default"> irrigation</style></keyword><keyword><style face="normal" font="default"> cotton</style></keyword><keyword><style face="normal" font="default"> CLAY</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword></keywords><dates><year Day="0" Month="0" Year="2007">2007</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0493-vories.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>195</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Chung,S.O.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Hummel,J.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Design and validation of an on-the-go soil strength profile sensor</style></title><secondary-title><style face="normal" font="default">Transactions of the ASABE</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the ASABE</style></full-title></periodical><pages end="14" start="5">5-14</pages><volume><style face="normal" font="default">49</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">area</style></keyword><keyword><style face="normal" font="default"> cone index</style></keyword><keyword><style face="normal" font="default"> CONE PENETROMETER</style></keyword><keyword><style face="normal" font="default"> cutting</style></keyword><keyword><style face="normal" font="default"> depth</style></keyword><keyword><style face="normal" font="default"> design</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> field tests</style></keyword><keyword><style face="normal" font="default"> INTERFERENCE</style></keyword><keyword><style face="normal" font="default"> measurement</style></keyword><keyword><style face="normal" font="default"> NUMBER</style></keyword><keyword><style face="normal" font="default"> sensing</style></keyword><keyword><style face="normal" font="default"> sensor</style></keyword><keyword><style face="normal" font="default"> slope</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil strength</style></keyword><keyword><style face="normal" font="default"> strength</style></keyword><keyword><style face="normal" font="default"> TESTS</style></keyword></keywords><dates><year Day="0" Month="0" Year="2006">2006</year></dates><abstract><style face="italic" font="Times New Roman">Soil strength has traditionally been determined using the cone penetrometer, an instrument that provides highlyvariable discrete point measurements, making it difficult to detect statistically significant differences in the soil strengthprofile among treatments or locations. Generally, this problem has been addressed by obtaining a large number ofmeasurements, a process that is time-consuming and labor-intensive. Our objective was to develop a soil strength profilesensor (SSPS) that could take measurements continuously and more efficiently while traveling across the field. The on-the-goSSPS was designed and fabricated using an array of load cells, each of which was interfaced with a soil-cutting tip. Thesemultiple prismatic tips were extended forward from the leading edge of a vertical blade and spaced apart to minimizeinterference from the main blade and adjacent sensing tips. Prismatic soil strength index (PSSI, MPa) was defined as the forcedivided by the base area of the sensing tip. The sensing tip had a 60</style><style face="normal" font="PSOwstdutchi">° </style><style face="italic" font="Times New Roman">cutting or apex angle and a base area of 361 mm2. Thedesign maximum operating depth was 0.5 m, and the upper limit and resolution of soil strength were 19.4 and 0.14 MPa,respectively. Field tests determined that the optimum extension and spacing of the cutting tips were 5.1 and 10 cm,respectively. A significant (</style><style face="normal" font="PSOgrkdutchbsi"> </style><style face="italic" font="Times New Roman">= 0.01) linear relationship between PSSI and penetrometer cone index (CI), with a slope ofapproximately 0.6, was found for field data collected at a 30 cm depth. The ability to develop such relationships comparingpenetrometer and SSPS data will allow SSPS data to be interpreted with respect to the available body of penetrometerliterature.</style></abstract><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0195-174270.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>266</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Chung,S.O.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Soil failure models for vertically operating and horizontally operating strength sensors</style></title><secondary-title><style face="normal" font="default">Transactions of the ASABE</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the ASABE</style></full-title></periodical><pages end="863" start="851">851-863</pages><volume><style face="normal" font="default">49</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">soil</style></keyword><keyword><style face="normal" font="default"> models</style></keyword><keyword><style face="normal" font="default"> MODEL</style></keyword><keyword><style face="normal" font="default"> strength</style></keyword><keyword><style face="normal" font="default"> sensors</style></keyword><keyword><style face="normal" font="default"> sensor</style></keyword></keywords><dates><year Day="0" Month="0" Year="2006">2006</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0266-178927.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>233</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Preemergence banded herbicides followed by only one between-row mowing controls weeds in corn</style></title><secondary-title><style face="normal" font="default">Weed Technology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Technology</style></full-title></periodical><pages end="149" start="143">143-149</pages><volume><style face="normal" font="default">20</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">banded herbicide</style></keyword><keyword><style face="normal" font="default"> controls</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> mowing</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> WEEDS</style></keyword></keywords><dates><year Day="0" Month="0" Year="2006">2006</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0233-174173.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>246</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author><author><style face="normal" font="default"> Hoerauf,R.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Enhanced germination and emergence of dormant wild mustard (Sinapsis arvensis) seed by two substituted phthalimides</style></title><secondary-title><style face="normal" font="default">Weed Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Science</style></full-title></periodical><pages end="902" start="894">894-902</pages><volume><style face="normal" font="default">33</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">GERMINATION</style></keyword><keyword><style face="normal" font="default"> EMERGENCE</style></keyword><keyword><style face="normal" font="default"> SEED</style></keyword></keywords><dates><year Day="0" Month="0" Year="2006">2006</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0246-184542.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>236</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Estimated corn yields using either weed cover or rated control after pre-emergence herbicide</style></title><secondary-title><style face="normal" font="default">Weed Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Science</style></full-title></periodical><pages end="379" start="373">373-379</pages><volume><style face="normal" font="default">54</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">corn</style></keyword><keyword><style face="normal" font="default"> corn yield</style></keyword><keyword><style face="normal" font="default"> CORN YIELDS</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> yields</style></keyword></keywords><dates><year Day="0" Month="0" Year="2006">2006</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0236-173579.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>237</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author><author><style face="normal" font="default"> Nelson,K.</style></author></authors></contributors><titles><title><style face="normal" font="default">Practical changes to single-boom sprayers for zone herbicide application</style></title><secondary-title><style face="normal" font="default">Weed Technology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Technology</style></full-title></periodical><pages end="510" start="502">502-510</pages><volume><style face="normal" font="default">20</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">sprayer</style></keyword><keyword><style face="normal" font="default"> ZONE</style></keyword><keyword><style face="normal" font="default"> zone herbicide application</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword></keywords><dates><year Day="0" Month="0" Year="2006">2006</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0237-184542.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>232</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Between observer differences in relative corn yield versus rated weed control</style></title><secondary-title><style face="normal" font="default">Weed Technology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Technology</style></full-title></periodical><pages end="51" start="41">41-51</pages><volume><style face="normal" font="default">20</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">corn</style></keyword><keyword><style face="normal" font="default"> corn yield</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> weed control</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword></keywords><dates><year Day="0" Month="0" Year="2006">2006</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0232-157889.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>269</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Jang,G.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Hong,S.Y.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Palm,H.L.</style></author></authors></contributors><titles><title><style face="normal" font="default">Relating hyperspectral image bands and vegetation indices to corn and soybean yield</style></title><secondary-title><style face="normal" font="default">Korean Journal of Remote Sensing</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Korean Journal of Remote Sensing</style></full-title></periodical><pages end="197" start="183">183-197</pages><volume><style face="normal" font="default">22</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">corn</style></keyword><keyword><style face="normal" font="default"> soybean</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword></keywords><dates><year Day="0" Month="0" Year="2006">2006</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0269-jang.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>235</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Jung,W.K.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Anderson,S.H.</style></author></authors></contributors><titles><title><style face="normal" font="default">Spatial characteristics of claypan soil properties in an agricultural field</style></title><secondary-title><style face="normal" font="default">Soil Science Society of America Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil Science Society of America Journal</style></full-title></periodical><pages end="1397" start="1387">1387-1397</pages><volume><style face="normal" font="default">70</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">characteristics</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil properties</style></keyword></keywords><dates><year Day="0" Month="0" Year="2006">2006</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0235-184494.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>234</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kim,H.J.</style></author><author><style face="normal" font="default"> Hummel,J.W.</style></author><author><style face="normal" font="default"> Birrell,S.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Evaluation of nitrate and potassium ion-selective membranes for soil macronutrient sensing</style></title><secondary-title><style face="normal" font="default">Transactions of the ASABE</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the ASABE</style></full-title></periodical><pages end="606" start="597">597-606</pages><volume><style face="normal" font="default">49</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">evaluation</style></keyword><keyword><style face="normal" font="default"> membrane</style></keyword><keyword><style face="normal" font="default"> NITRATE</style></keyword><keyword><style face="normal" font="default"> potassium</style></keyword><keyword><style face="normal" font="default"> sensing</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword></keywords><dates><year Day="0" Month="0" Year="2006">2006</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0234-173278.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>452</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kim,H.J.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Hummel,J.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Sensing Nitrate and Potassium Ions in Soil Extracts Using Ion-Selective Electrodes</style></title><secondary-title><style face="normal" font="default">Journal of Biosystems Engineering</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Biosystems Engineering</style></full-title></periodical><pages end="473" start="463">463-473</pages><volume><style face="normal" font="default">31</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">sensing</style></keyword><keyword><style face="normal" font="default"> NITRATE</style></keyword><keyword><style face="normal" font="default"> potassium</style></keyword><keyword><style face="normal" font="default"> IONS</style></keyword><keyword><style face="normal" font="default"> ION</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> EXTRACTS</style></keyword><keyword><style face="normal" font="default"> ION-SELECTIVE ELECTRODES</style></keyword><keyword><style face="normal" font="default"> ION-SELECTIVE ELECTRODE</style></keyword><keyword><style face="normal" font="default"> ELECTRODES</style></keyword></keywords><dates><year Day="0" Month="0" Year="2006">2006</year></dates><pub-location><style face="normal" font="default">Republic of Korea</style></pub-location><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0452-kim.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>207</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kremer,R.J.</style></author><author><style face="normal" font="default"> Caesar,A.J.</style></author><author><style face="normal" font="default"> Souissi,T.</style></author></authors></contributors><titles><title><style face="normal" font="default">Soilborne microorganisms of </style><style face="italic" font="default">Euphorbia</style><style face="normal" font="default"> are potential biological control agents of the invasive weed leafy spurge</style></title><secondary-title><style face="normal" font="default">Applied Soil Ecology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Applied Soil Ecology</style></full-title></periodical><pages end="37" start="27">27-37</pages><volume><style face="normal" font="default">32</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">MICROORGANISMS</style></keyword><keyword><style face="normal" font="default"> biological control</style></keyword><keyword><style face="normal" font="default"> BIOLOGICAL-CONTROL</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> leafy spurge</style></keyword></keywords><dates><year Day="0" Month="0" Year="2006">2006</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0207-160709.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>295</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Li,J.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Growth response of weed and crop seedlings to deleterious rhizobacteria</style></title><secondary-title><style face="normal" font="default">Biological Control</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Biological Control</style></full-title></periodical><pages end="65" start="58">58-65</pages><volume><style face="normal" font="default">39</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">growth</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> SEEDLINGS</style></keyword><keyword><style face="normal" font="default"> DELETERIOUS RHIZOBACTERIA</style></keyword><keyword><style face="normal" font="default"> RHIZOBACTERIA</style></keyword></keywords><dates><year Day="0" Month="0" Year="2006">2006</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0295-li.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>296</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Marsh,L.E.</style></author><author><style face="normal" font="default"> Baptiste,R.</style></author><author><style face="normal" font="default"> Marsh,D.B.</style></author><author><style face="normal" font="default"> Trinklein,D.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Temperature effects on Bradyrhizobium spp. growth and symbiotic effectiveness with pigeonpea and cowpea</style></title><secondary-title><style face="normal" font="default">Journal of Plant Nutrition</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Plant Nutrition</style></full-title></periodical><pages end="346" start="331">331-346</pages><volume><style face="normal" font="default">29</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">temperature</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword></keywords><dates><year Day="0" Month="0" Year="2006">2006</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0296-199274.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>331</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Martin,N.</style></author><author><style face="normal" font="default"> Bollero,G.A.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Kravchenko,A.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Wiebold,W.J.</style></author><author><style face="normal" font="default"> Bullock,D.G.</style></author></authors></contributors><titles><title><style face="normal" font="default">Two classification methods for developing and interpreting productivity zones using site properties</style></title><secondary-title><style face="normal" font="default">Plant and Soil</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Plant and Soil</style></full-title></periodical><pages end="371" start="357">357-371</pages><volume><style face="normal" font="default">288</style></volume><number><style face="normal" font="default">1-2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">CLASSIFICATION</style></keyword><keyword><style face="normal" font="default"> METHODS</style></keyword><keyword><style face="normal" font="default"> ZONE</style></keyword></keywords><dates><year Day="0" Month="0" Year="2006">2006</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0331-207287.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>291</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Mungai,N.W.</style></author><author><style face="normal" font="default"> Motavalli,P.P.</style></author><author><style face="normal" font="default"> Nelson,K.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Differences in yields, residue composition, and N mineralization dynamics of BT and non-BT maize</style></title><secondary-title><style face="normal" font="default">Nutrient Cycling in Agroecosystems</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Nutrient Cycling in Agroecosystems</style></full-title></periodical><pages end="109" start="101">101-109</pages><volume><style face="normal" font="default">73</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">dynamics</style></keyword><keyword><style face="normal" font="default"> maize</style></keyword><keyword><style face="normal" font="default"> mineralization</style></keyword><keyword><style face="normal" font="default"> RESIDUE</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> yields</style></keyword></keywords><dates><year Day="0" Month="0" Year="2006">2006</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0291-192657.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>283</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Roberts,D.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Scharf,P.C.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">An Environmental Assessment of Sensor-Based Variable-Rate Nitrogen Management In Corn</style></title><secondary-title><style face="normal" font="default">North Central Extension Industry Soil Fertility Conference Proceedings</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">North Central Extension Industry Soil Fertility Conference Proceedings</style></full-title></periodical><pages end="" start="">-</pages><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">variable-rate</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> NITRATE</style></keyword><keyword><style face="normal" font="default"> contamination</style></keyword><keyword><style face="normal" font="default"> SURFACE</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> METHODS</style></keyword><keyword><style face="normal" font="default"> SPATIAL VARIABILITY</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword><keyword><style face="normal" font="default"> fields</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> site-specific</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> canopy</style></keyword><keyword><style face="normal" font="default"> sensors</style></keyword><keyword><style face="normal" font="default"> sensor</style></keyword><keyword><style face="normal" font="default"> N-fertilizer</style></keyword><keyword><style face="normal" font="default"> fertilizer</style></keyword><keyword><style face="normal" font="default"> fertilizer application</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> measurement</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> MODEL</style></keyword><keyword><style face="normal" font="default"> determination</style></keyword><keyword><style face="normal" font="default"> reflectance</style></keyword><keyword><style face="normal" font="default"> losses</style></keyword></keywords><dates><year Day="6" Month="11" Year="2006">2006/11/6</year></dates><abstract><style face="normal" font="default">In order to address the problem of nitrate contamination of surface and ground waters, various methods have been used to try to account for spatial variability of N within agricultural fields. One approach to account for this variability and thereby reduce nitrate pollution is in-season site-specific N application according to economic optimal N rate (EONR). Recently, active crop canopy sensors have been tested for mid-season, on-the-go N fertilizer application in corn. This 2004 and 2005 study was conducted on 12 Missouri producer corn fields to (1) evaluate the relationship between EONR and active canopy sensor readings, and (2) evaluate the relationship between environmental measurements and EONR. Measurements included EONR, yield efficiency (YE), N fertilizer recovery efficiency (NFRE), and post-harvest soil inorganic N levels. In 2004, EONR was significantly related to active crop canopy sensor indices, but with regression model coefficients of determination (r2) less than or greater than 0.35 for all sensor indices evaluated. As N rate approached EONR, both YE and NFRE declined, while post-harvest inorganic N levels increased. A relationship between EONR and the indices could not be established for 2005 data, primarily because of droughty conditions. These preliminary results show promise for using active-light reflectance sensors to achieve EONR and reduce N loss off fields.</style></abstract><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0283-202265.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>439</rec-number><ref-type name="Conference Proceeding">12</ref-type><contributors><authors><author><style face="normal" font="default">Sadler,E.J.</style></author><author><style face="normal" font="default"> Lerch,R.N.</style></author><author><style face="normal" font="default"> Alberts,E.E.</style></author><author><style face="normal" font="default"> Oster,T.</style></author></authors><secondary-authors><author><style face="normal" font="default">Fowler,D.L.</style></author></secondary-authors></contributors><titles><title><style face="normal" font="default">Long-term hydrologic database: Goodwater Creek, Missouri</style></title><secondary-title><style face="normal" font="default">Proceedings 2nd Interagency Conference on Research in the Watersheds</style></secondary-title><alt-title><style face="normal" font="default">2</style><style face="superscript" font="default">nd </style><style face="normal" font="default">Interagency Conference on Research in the Watersheds</style></alt-title></titles><periodical><full-title><style face="normal" font="System">Proceedings 2nd Interagency Conference on Research in the Watersheds</style></full-title></periodical><pages end="168" start="161">161-168</pages><edition><style face="normal" font="default">Coweeta Hydrologic Laboratory, Otto, NC</style></edition><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">Missouri</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> watersheds</style></keyword><keyword><style face="normal" font="default"> watershed</style></keyword></keywords><dates><year Day="0" Month="0" Year="2006">2006</year><pub-dates><date Day="16" Month="5" Year="2006">2006/5/16</date></pub-dates></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0439-sadler.pdf</url></pdf-urls></urls><misc2><style face="normal" font="default">Coweeta Hydrologic Laboratory, Otto, NC</style></misc2></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>220</rec-number><ref-type name="Conference Proceeding">12</ref-type><contributors><authors><author><style face="normal" font="default">Sadler,E.J.</style></author><author><style face="normal" font="default"> Bausch,W.C.</style></author><author><style face="normal" font="default"> Fausey,N.R.</style></author><author><style face="normal" font="default"> Ferguson,R.B.</style></author></authors></contributors><titles><title><style face="normal" font="default">Improving Water Use Efficiency in Agriculture</style></title><secondary-title><style face="normal" font="default">Proceedings International Fertilizer Industry Association (IFA)/Chinese National Chemical Construction Corporation (CNCCC) Agriculture Conference</style></secondary-title><alt-title><style face="normal" font="default">Optimizing Resource Use Efficiency for Sustainable Intensification of Agriculture</style></alt-title></titles><periodical><full-title><style face="normal" font="System">Proceedings International Fertilizer Industry Association (IFA)/Chinese National Chemical Construction Corporation (CNCCC) Agriculture Conference</style></full-title></periodical><pages end="" start="">-</pages><edition><style face="normal" font="default">Kunming, China</style></edition><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">water</style></keyword><keyword><style face="normal" font="default"> water use</style></keyword><keyword><style face="normal" font="default"> WATER-USE</style></keyword><keyword><style face="normal" font="default"> use efficiency</style></keyword><keyword><style face="normal" font="default"> fertilizer</style></keyword></keywords><dates><year Day="0" Month="0" Year="2006">2006</year><pub-dates><date Day="0" Month="0" Year="-32676">27 February - 2 March, 2006</date></pub-dates></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0220-sadler.pdf</url></pdf-urls></urls><misc2><style face="normal" font="default">Kunming, China</style></misc2></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>217</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Scharf,P.C.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Davis,J.G.</style></author></authors></contributors><titles><title><style face="normal" font="default">Spatially variable corn yield is a weak predictor of optimal nitrogen rate</style></title><secondary-title><style face="normal" font="default">Soil Science Society of America Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil Science Society of America Journal</style></full-title></periodical><pages end="2160" start="2154">2154-2160</pages><volume><style face="normal" font="default">70</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">corn</style></keyword><keyword><style face="normal" font="default"> corn yield</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword></keywords><dates><year Day="0" Month="0" Year="2006">2006</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0217-163333.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>280</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Souza,E.G.</style></author><author><style face="normal" font="default"> Scharf,P.C.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Hipple,J.D.</style></author></authors></contributors><titles><title><style face="normal" font="default">Using a Field Radiometer to Estimate Instantaneous Sky Clearness</style></title><secondary-title><style face="normal" font="default">Revista Brasileira de Engenharia Agricola e Ambiental</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Revista Brasileira de Engenharia Agricola e Ambiental</style></full-title></periodical><pages end="" start="">-</pages><volume><style face="normal" font="default">10</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">FIELD</style></keyword></keywords><dates><year Day="0" Month="0" Year="2006">2006</year></dates><abstract><style face="normal" font="default">Reflectance measurements of crop plants and canopies show promise for guiding within-season, variable-rate nitrogen(N) application. Most research results have been obtained around solar noon with clear skies. However, for practical application, the system must work under cloudy skies or away from solar noon. The objective of this work was to assess the effect of cloud conditions on reflectance measurements of a corn canopy. The approach was to estimate an instantaneous sky clearness index (ICI) which could be used to correct field radiometer data for variations in cloud cover, such that the same reflectance reading would be obtained (and the same N recommendation made) for the same plants regardless of cloud conditions. Readings were taken from morning until night over 11 days with a range of sky conditions (sunny, overcast, partly cloudy). Data from clear days were used to estimate the theoretical expected spectral global radiation incident on a horizontal surface. The ICI was calculated as the ratio between the actual spectral global radiation and the corresponding theoretical global radiation. Analysis of the ICI for each band showed that the influence of cloudiness was different for each band. Thus, the cloud effect could not be compensated by the use of a band ratio or vegetation index.</style></abstract><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0280-202359.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>231</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Stone,K.C.</style></author><author><style face="normal" font="default"> Sadler,E.J.</style></author><author><style face="normal" font="default"> Millen,J.A.</style></author><author><style face="normal" font="default"> Evans,D.E.</style></author><author><style face="normal" font="default"> Camp,C.R.</style></author></authors></contributors><titles><title><style face="normal" font="default">Water flow rates from a site-specific irrigation system</style></title><secondary-title><style face="normal" font="default">Applied Engineering in Agriculture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Applied Engineering in Agriculture</style></full-title></periodical><pages end="78" start="73">73-78</pages><volume><style face="normal" font="default">22</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">water</style></keyword><keyword><style face="normal" font="default"> FLOW</style></keyword><keyword><style face="normal" font="default"> RATES</style></keyword><keyword><style face="normal" font="default"> site-specific</style></keyword><keyword><style face="normal" font="default"> site-specific irrigation</style></keyword><keyword><style face="normal" font="default"> irrigation</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword></keywords><dates><year Day="23" Month="2" Year="2006">2006/2/23</year></dates><urls><pdf-urls><url ppv-ref="no">http://hdl.handle.net/10113/1602</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>268</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Yildirim,S.</style></author><author><style face="normal" font="default"> Birrell,S.J.</style></author><author><style face="normal" font="default"> Hummel,J.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Laboratory evaluation of an electro-pneumatic sampling method for real-time soil sensing</style></title><secondary-title><style face="normal" font="default">Transactions of the ASABE</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the ASABE</style></full-title></periodical><pages end="850" start="845">845-850</pages><volume><style face="normal" font="default">49</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">evaluation</style></keyword><keyword><style face="normal" font="default"> sampling</style></keyword><keyword><style face="normal" font="default"> real-time</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> sensing</style></keyword></keywords><dates><year Day="0" Month="0" Year="2006">2006</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0268-155850.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>222</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Chung,S.O.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Chang,Y.</style></author></authors></contributors><titles><title><style face="normal" font="default">Path analysis of factors limiting crop yield in rice paddy and upland corn fields</style></title><secondary-title><style face="normal" font="default">Journal of Biosystems Engineering</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Biosystems Engineering</style></full-title></periodical><pages end="55" start="45">45-55</pages><volume><style face="normal" font="default">30</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">PATH-ANALYSIS</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> crop yield</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> RICE</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> fields</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword></keywords><dates><year Day="0" Month="0" Year="2005">2005</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0222-173979.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>165</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Edwards,J.T.</style></author><author><style face="normal" font="default"> Purcell,L.C.</style></author><author><style face="normal" font="default"> Vories,E.D.</style></author></authors></contributors><auth-address><style face="normal" font="default">Univ Arkansas, Dept Crop Soil &amp; Environ Sci, Fayetteville, AR 72704 USAOklahoma State Univ, Dept Plant &amp; Soil Sci, Stillwater, OK 74078 USAUSDA ARS, Portageville, MO 63873 USA</style></auth-address><titles><title><style face="normal" font="default">Light interception and yield potential of short-season maize (Zea mays L.) hybrids in the midsouth</style></title><secondary-title><style face="normal" font="default">Agronomy Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Agronomy Journal</style></full-title></periodical><pages end="234" start="225">225-234</pages><volume><style face="normal" font="default">97</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">biomass</style></keyword><keyword><style face="normal" font="default"> CORN-BELT</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> DENSITIES</style></keyword><keyword><style face="normal" font="default"> drought</style></keyword><keyword><style face="normal" font="default"> EMERGENCE</style></keyword><keyword><style face="normal" font="default"> evapotranspiration</style></keyword><keyword><style face="normal" font="default"> GRAIN-YIELD</style></keyword><keyword><style face="normal" font="default"> irrigation</style></keyword><keyword><style face="normal" font="default"> light</style></keyword><keyword><style face="normal" font="default"> LIGHT INTERCEPTION</style></keyword><keyword><style face="normal" font="default"> maize</style></keyword><keyword><style face="normal" font="default"> MATURITY</style></keyword><keyword><style face="normal" font="default"> maximum yield</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> PLANT-POPULATION</style></keyword><keyword><style face="normal" font="default"> PLANTS</style></keyword><keyword><style face="normal" font="default"> POPULATIONS</style></keyword><keyword><style face="normal" font="default"> RADIATION-USE EFFICIENCY</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> row spacing</style></keyword><keyword><style face="normal" font="default"> SEED</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> TIME</style></keyword><keyword><style face="normal" font="default"> USDA</style></keyword><keyword><style face="normal" font="default"> WATER-USE</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> Zea mays</style></keyword><keyword><style face="normal" font="default"> ZEA-MAYS</style></keyword></keywords><dates><year Day="0" Month="0" Year="2005">2005</year></dates><isbn><style face="normal" font="default">0002-1962</style></isbn><abstract><style face="normal" font="default">The midsouthern USA typically has a mid- to late-summer drought that limits the productivity of nonirrigated maize (Zea mays L.) production. We hypothesized that by increasing seeded population and narrowing row spacing, short-season maize hybrids in the Midsouth would have similar yield but require less irrigation compared with hybrids currently grown. Irrigated experiments were conducted at Fayetteville, AR, in 2001, 2002, and 2003 and at Keiser, AR, in 2002 and 2003. Factors evaluated included maize maturity (75- to 110-d maize hybrids) and maize seeded population (5 to 20 seed M-2) Sown in 50-cm rows. Between emergence and black layer, short-season maize hybrids required 30 to 50% less irrigation than did their full-season counterparts. Yield of short-season maize at high plant populations ( 19 plants M-2) was equal to that of full-season hybrids, which reached maximum yield at lower plant populations (4 plants M-2). Maize biomass at maturity had a linear relationship with cumulative intercepted photosynthetically active radiation (CIPAR) from emergence to maturity, but maize yield had an asymptotic relationship with CIPAR with little increase in yield for CIPAR above 555 MJ m(-2). This research indicates that increasing plant population for short-season maize hybrids increased CIPAR, which compensated for a short growing season to achieve similar potential yield to full-season hybrids in the Midsouth with substantially less irrigation</style></abstract><notes><style face="normal" font="default">Times Cited: 0ArticleEnglishPurcell, L. CUniv Arkansas, Dept Crop Soil &amp; Environ Sci, 1366 W Altheimer Dr, Fayetteville, AR 72704 USACited References Count: 31894IBAMER SOC AGRONOMY677 S SEGOE RD, MADISON, WI 53711 USAMADISON</style></notes><urls><web-urls><url ppv-ref="no">ISI:000226783300031</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0165-edwards.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>211</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Fang,M.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Motavalli,P.P.</style></author><author><style face="normal" font="default"> Davis,G.</style></author></authors></contributors><titles><title><style face="normal" font="default">Bacterial Diversity in Rhizospheres of Non-Transgenic and Transgenic Corn</style></title><secondary-title><style face="normal" font="default">Applied and Environmental Microbiology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Applied and Environmental Microbiology</style></full-title></periodical><pages end="4136" start="4132">4132-4136</pages><volume><style face="normal" font="default">71</style></volume><number><style face="normal" font="default">7</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">DIVERSITY</style></keyword><keyword><style face="normal" font="default"> rhizosphere</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword></keywords><dates><year Day="0" Month="0" Year="2005">2005</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0211-176539.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>185</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Ghidey,F.</style></author><author><style face="normal" font="default"> Blanchard,P.E.</style></author><author><style face="normal" font="default"> Lerch,R.</style></author><author><style face="normal" font="default"> Kitchen,N.</style></author><author><style face="normal" font="default"> Alberts,E.E.</style></author><author><style face="normal" font="default"> Sadler,E.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Measurement and simulation of herbicide transport from the corn phase of three cropping systems</style></title><secondary-title><style face="normal" font="default">Journal of Soil and Water Conservation</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Soil and Water Conservation</style></full-title></periodical><pages end="273" start="260">260-273</pages><volume><style face="normal" font="default">60</style></volume><number><style face="normal" font="default">5</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">corn</style></keyword><keyword><style face="normal" font="default"> cropping system</style></keyword><keyword><style face="normal" font="default"> cropping systems</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> measurement</style></keyword><keyword><style face="normal" font="default"> simulation</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> SYSTEMS</style></keyword><keyword><style face="normal" font="default"> transport</style></keyword></keywords><dates><year Day="0" Month="0" Year="2005">2005</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0185-174337.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>212</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Jung,W.K.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Motavalli,P.P.</style></author></authors></contributors><titles><title><style face="normal" font="default">Relationship of apparent soil electrical conductivity to claypan soil properties</style></title><secondary-title><style face="normal" font="default">Soil Science Society of America Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil Science Society of America Journal</style></full-title></periodical><pages end="892" start="883">883-892</pages><volume><style face="normal" font="default">69</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">ELECTRICAL-CONDUCTIVITY</style></keyword><keyword><style face="normal" font="default"> electrical conductivity</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil electrical conductivity</style></keyword><keyword><style face="normal" font="default"> soil properties</style></keyword></keywords><dates><year Day="0" Month="0" Year="2005">2005</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0212-166139.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>221</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kim,H.J.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Scanning and transmission electron microscopy of root colonization of morningglory (Ipomoea spp) seedlings by rhizobacteria</style></title><secondary-title><style face="normal" font="default">Symbiosis</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Symbiosis</style></full-title></periodical><pages end="124" start="117">117-124</pages><volume><style face="normal" font="default">39</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">colonization</style></keyword><keyword><style face="normal" font="default"> electron microscopy</style></keyword><keyword><style face="normal" font="default"> RHIZOBACTERIA</style></keyword><keyword><style face="normal" font="default"> ROOT</style></keyword><keyword><style face="normal" font="default"> SEEDLINGS</style></keyword></keywords><dates><year Day="0" Month="0" Year="2005">2005</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0221-kim.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>186</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kitchen,N.R.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Myers,D.B.</style></author><author><style face="normal" font="default"> massey,R.E.</style></author><author><style face="normal" font="default"> Sadler,E.J.</style></author><author><style face="normal" font="default"> Lerch,R.N.</style></author><author><style face="normal" font="default"> Hummel,J.W.</style></author><author><style face="normal" font="default"> Palm,H.L.</style></author></authors></contributors><titles><title><style face="normal" font="MetaPlusBold-Roman">Development of a conservation-oriented precision agriculture system: II. Crop production assessment and plan implementation</style></title><secondary-title><style face="normal" font="default">Journal of Soil and Water Conservation</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Soil and Water Conservation</style></full-title></periodical><pages end="430" start="421">421-430</pages><volume><style face="normal" font="default">60</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">area</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> crop production</style></keyword><keyword><style face="normal" font="default"> EROSION</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> information</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> MANAGEMENT-PRACTICES</style></keyword><keyword><style face="normal" font="default"> maps</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> position</style></keyword><keyword><style face="normal" font="default"> precision agriculture</style></keyword><keyword><style face="normal" font="default"> QUALITY</style></keyword><keyword><style face="normal" font="default"> site specific management</style></keyword><keyword><style face="normal" font="default"> site-specific</style></keyword><keyword><style face="normal" font="default"> site-specific management</style></keyword><keyword><style face="normal" font="default"> slope</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil quality</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> TIME</style></keyword><keyword><style face="normal" font="default"> topsoil</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword><keyword><style face="normal" font="default"> variation</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> yield map</style></keyword></keywords><dates><year Day="0" Month="0" Year="2005">2005</year></dates><abstract><style face="normal" font="MetaPlusNormal-Roman">From site-specific crop and soil information collected from a Missouri claypan soilfield for over a decade (1993 to 2003), we implemented a precision agriculture system in 2004with a goal of using site-specific management practices to improve farming profitability andconserve soil and water resources. The objectives of this study were to: 1) show how precisioncrop and soil information was used to assess productivity, and 2) document the development ofthe precision agriculture system plan for implementation on the field, relying on this productivityassessment and conservation opportunities. The study field was uniformly managed from 1991-2003, during which time variability in soil and landscape parameters and yield were measured,and causes of yield variation were determined. Profitability maps were created from yield mapsand production records. Because erosion has degraded the topsoil on shoulder and side slopepositions of major portions of this field, corn-soybean management practices have rarely beenprofitable in these shallow topsoil areas. We prioritized these and other results, and developedthe precision agriculture system plan. The plan, described in detail, is aimed at increasingprofitability while improving water and soil quality.</style></abstract><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0186-174377.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>168</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kitchen,N.R.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Myers,D.B.</style></author><author><style face="normal" font="default"> Drummond,S.T.</style></author><author><style face="normal" font="default"> Hong,S.Y.</style></author></authors></contributors><auth-address><style face="normal" font="default">Univ Missouri, USDA ARS, Cropping Syst &amp; Water Qual Res Unit, Columbia, MO 65211 USAUniv Missouri, Dept Soils, Columbia, MO 65211 USANatl Inst Agr Sci &amp; Technol, Suwon, South Korea</style></auth-address><titles><title><style face="normal" font="default">Delineating productivity zones on claypan soil fields using apparent soil electrical conductivity</style></title><secondary-title><style face="normal" font="default">Computers and Electronics in Agriculture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Computers and Electronics in Agriculture</style></full-title></periodical><pages end="308" start="285">285-308</pages><volume><style face="normal" font="default">46</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">accuracy</style></keyword><keyword><style face="normal" font="default"> CLASSIFICATION</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> crop yield</style></keyword><keyword><style face="normal" font="default"> electrical conductivity</style></keyword><keyword><style face="normal" font="default"> ELECTRICAL-CONDUCTIVITY</style></keyword><keyword><style face="normal" font="default"> electromagnetic induction</style></keyword><keyword><style face="normal" font="default"> EM38</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> fields</style></keyword><keyword><style face="normal" font="default"> GPS</style></keyword><keyword><style face="normal" font="default"> IOWA FIELD</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> management zones</style></keyword><keyword><style face="normal" font="default"> maps</style></keyword><keyword><style face="normal" font="default"> measurement</style></keyword><keyword><style face="normal" font="default"> METHODS</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> MODEL</style></keyword><keyword><style face="normal" font="default"> precision agriculture</style></keyword><keyword><style face="normal" font="default"> sensor</style></keyword><keyword><style face="normal" font="default"> site specific management</style></keyword><keyword><style face="normal" font="default"> site-specific</style></keyword><keyword><style face="normal" font="default"> site-specific crop management</style></keyword><keyword><style face="normal" font="default"> site-specific management</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil electrical conductivity</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> soybean</style></keyword><keyword><style face="normal" font="default"> spatial pattern</style></keyword><keyword><style face="normal" font="default"> TIME</style></keyword><keyword><style face="normal" font="default"> topography</style></keyword><keyword><style face="normal" font="default"> USDA</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> yield map</style></keyword><keyword><style face="normal" font="default"> ZONE</style></keyword></keywords><dates><year Day="0" Month="0" Year="2005">2005</year></dates><isbn><style face="normal" font="default">0168-1699</style></isbn><abstract><style face="normal" font="default">Efficient and cost-effective methods are needed for delineating sub-field productivity zones to improve soil and crop site-specific management. This investigation was conducted to answer the question of whether apparent soil electrical conductivity (ECa) and elevation could be used to delineate productivity zones (SPZ) for claypan soil fields that would agree with productivity zones delineated from yield map data (YPZ). Ten and seven years of combine-monitored yield maps were available for two Missouri claypan soil fields, designated Field 1 and Field 2, respectively. The fields were generally cropped in corn and soybean. Soil ECa data were collected with a non-contact, electromagnetic induction-based ECa sensor (Geonics EM38) and a coulter-based sensor (Veris model 3 100). Elevation data were collected using a real-time kinematic GPS. Unsupervised fuzzy c-means clustering was independently used both on yield data to delineate three YPZ and on combinations of ECa and/or elevation data to delineate three SPZ. Outcomes of YPZ and SPZ were matched and agreement calculated with an overall accuracy statistic and a statistical index called the Kappa coefficient. Best performing combinations of ECa and elevation variables gave 60-70% agreement between YPZ and SPZ. We consider this level of agreement promising, especially considering that there were many other yield-limiting factors unrelated to ECa and elevation. Generally, multiple variables of ECa and elevation were better than a single variable for generating SPZ. The specific combinations of ECa and/or elevation variables that gave highest agreement between YPZ and SPZ were field specific. Based on these findings, we conclude ECa and elevation measurements can be reliably used for creating productivity zones on claypan soil fields. Published by Elsevier B.V</style></abstract><notes><style face="normal" font="default">Times Cited: 1ArticleEnglishKitchen, N. RUniv Missouri, USDA ARS, Cropping Syst &amp; Water Qual Res Unit, 269 Agr Engn Bldg, Columbia, MO 65211 USACited References Count: 40908XOELSEVIER SCI LTDTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDOXFORD</style></notes><urls><web-urls><url ppv-ref="no">ISI:000227823700012</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0168-150157.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>294</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">The role of bioherbicides in weed management</style></title><secondary-title><style face="normal" font="default">Biopesticides International</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Biopesticides International</style></full-title></periodical><pages end="141" start="127">127-141</pages><volume><style face="normal" font="default">1</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">weed</style></keyword><keyword><style face="normal" font="default"> weed management</style></keyword><keyword><style face="normal" font="default"> management</style></keyword></keywords><dates><year Day="0" Month="0" Year="2005">2005</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0294-193032.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>210</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kremer,R.J.</style></author><author><style face="normal" font="default"> Means,N.E.</style></author><author><style face="normal" font="default"> Kim,S.</style></author></authors></contributors><titles><title><style face="normal" font="default">Glyphosate affects soybean root exudation and rhizosphere microorganisms</style></title><secondary-title><style face="normal" font="default">International Journal of Analytical Environmental Chemistry</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">International Journal of Analytical Environmental Chemistry</style></full-title></periodical><pages end="1174" start="1165">1165-1174</pages><volume><style face="normal" font="default">85</style></volume><number><style face="normal" font="default">15</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">glyphosate</style></keyword><keyword><style face="normal" font="default"> rhizosphere</style></keyword><keyword><style face="normal" font="default"> ROOT</style></keyword><keyword><style face="normal" font="default"> soybean</style></keyword></keywords><dates><year Day="0" Month="0" Year="2005">2005</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0210-170287.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>187</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lerch,R.N.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Donald,W.W.</style></author><author><style face="normal" font="default"> Alberts,E.E.</style></author><author><style face="normal" font="default"> Sadler,E.J.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Myers,D.B.</style></author><author><style face="normal" font="default"> Ghidey,F.</style></author></authors></contributors><titles><title><style face="normal" font="MetaPlusBold-Roman">Development of a conservation-oriented precision agriculture system: Water and soil quality assessment</style></title><secondary-title><style face="normal" font="default">Journal of Soil and Water Conservation</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Soil and Water Conservation</style></full-title></periodical><pages end="421" start="411">411-421</pages><volume><style face="normal" font="default">60</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">precision agriculture</style></keyword><keyword><style face="normal" font="default"> QUALITY</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil quality</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> water</style></keyword></keywords><dates><year Day="0" Month="0" Year="2005">2005</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0187-179145.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>304</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lerch,R.N.</style></author><author><style face="normal" font="default"> Wicks,C.M.</style></author><author><style face="normal" font="default"> Moss,P.L.</style></author></authors></contributors><titles><title><style face="normal" font="default">Hydrologic characterization of two karst recharge areas in Boone County, Missouri</style></title><secondary-title><style face="normal" font="default">Journal of Cave and Karst Studies</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Cave and Karst Studies</style></full-title></periodical><pages end="173" start="158">158-173</pages><volume><style face="normal" font="default">67</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">area</style></keyword><keyword><style face="normal" font="default"> characterization</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword></keywords><dates><year Day="0" Month="0" Year="2005">2005</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0304-179033.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>226</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Means,N.E.</style></author><author><style face="normal" font="default"> Starbuck,C.J.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Jett,L.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Effects of a food waste-based soil conditioner on soil properties and plant growth</style></title><secondary-title><style face="normal" font="default">Compost Science and Utilization</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Compost Science and Utilization</style></full-title></periodical><pages end="121" start="116">116-121</pages><volume><style face="normal" font="default">13</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">soil</style></keyword><keyword><style face="normal" font="default"> soil properties</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> PLANT-GROWTH</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword></keywords><dates><year Day="0" Month="0" Year="2005">2005</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0226-kremer.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>230</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Mungai,N.W.</style></author><author><style face="normal" font="default"> Motavalli,P.P.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Nelson,K.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Spatial variation of soil enzyme activities and microbial functional diversity in temperate alley cropping systems</style></title><secondary-title><style face="normal" font="default">Biology and Fertility of Soils</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Biology and Fertility of Soils</style></full-title></periodical><pages end="136" start="129">129-136</pages><volume><style face="normal" font="default">42</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">cropping system</style></keyword><keyword><style face="normal" font="default"> cropping systems</style></keyword><keyword><style face="normal" font="default"> DIVERSITY</style></keyword><keyword><style face="normal" font="default"> ENZYME-ACTIVITIES</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil enzyme activity</style></keyword><keyword><style face="normal" font="default"> spatial variation</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> SYSTEMS</style></keyword><keyword><style face="normal" font="default"> variation</style></keyword></keywords><dates><year Day="0" Month="0" Year="2005">2005</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0230-mungai.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>213</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Oueslati,O.</style></author><author><style face="normal" font="default"> Ben-Hammouda,M.</style></author><author><style face="normal" font="default"> Ghorbal,M.H.</style></author><author><style face="normal" font="default"> Guezzah,M.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Barley autotoxicity as influenced by varietal and seasonal variation.</style></title><secondary-title><style face="normal" font="default">Journal of Agronomy and Crop Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Agronomy and Crop Science</style></full-title></periodical><pages end="254" start="249">249-254</pages><volume><style face="normal" font="default">191</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">barley</style></keyword><keyword><style face="normal" font="default"> seasonal variation</style></keyword><keyword><style face="normal" font="default"> variation</style></keyword></keywords><dates><year Day="0" Month="0" Year="2005">2005</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0213-171745.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>227</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Pengthamkeerati,P.</style></author><author><style face="normal" font="default"> Motavalli,P.P.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Anderson,S.H.</style></author></authors></contributors><titles><title><style face="normal" font="default">Soil carbon dioxide efflux in a claypan soil affected by surface compaction and applications of poultry manure</style></title><secondary-title><style face="normal" font="default">Agricultural Ecosystems and Environment</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Agricultural Ecosystems and Environment</style></full-title></periodical><pages end="86" start="75">75-86</pages><volume><style face="normal" font="default">109</style></volume><number><style face="normal" font="default">1-2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">soil</style></keyword><keyword><style face="normal" font="default"> carbon</style></keyword><keyword><style face="normal" font="default"> SURFACE</style></keyword><keyword><style face="normal" font="default"> compaction</style></keyword><keyword><style face="normal" font="default"> applications</style></keyword><keyword><style face="normal" font="default"> manure</style></keyword></keywords><dates><year Day="0" Month="0" Year="2005">2005</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0227-181393.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>191</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Sadler,E.J.</style></author><author><style face="normal" font="default"> Evans,R.G.</style></author><author><style face="normal" font="default"> Stone,K.C.</style></author><author><style face="normal" font="default"> Camp,C.R.</style></author></authors></contributors><titles><title><style face="normal" font="MetaPlusBold-Roman">Opportunities for conservation with precision irrigation</style></title><secondary-title><style face="normal" font="default">Journal of Soil and Water Conservation</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Soil and Water Conservation</style></full-title></periodical><pages end="379" start="371">371-379</pages><volume><style face="normal" font="default">60</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">area</style></keyword><keyword><style face="normal" font="default"> case studies</style></keyword><keyword><style face="normal" font="default"> drought</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> fields</style></keyword><keyword><style face="normal" font="default"> GRAIN</style></keyword><keyword><style face="normal" font="default"> irrigation</style></keyword><keyword><style face="normal" font="default"> IRRIGATION MANAGEMENT</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> monitoring</style></keyword><keyword><style face="normal" font="default"> nutrients</style></keyword><keyword><style face="normal" font="default"> pesticide</style></keyword><keyword><style face="normal" font="default"> pesticide application</style></keyword><keyword><style face="normal" font="default"> precision agriculture</style></keyword><keyword><style face="normal" font="default"> real-time</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> site-specific</style></keyword><keyword><style face="normal" font="default"> site-specific irrigation</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> SYSTEMS</style></keyword><keyword><style face="normal" font="default"> variable-rate</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> water conservation</style></keyword></keywords><dates><year Day="0" Month="0" Year="2005">2005</year></dates><abstract><style face="normal" font="MetaPlusNormal-Roman">Precision agriculture has mostly emphasized variable-rate nutrients, seeding, andpesticide application, but at several research sites, variable-rate irrigation equipment has beendeveloped to explore the potential for managing irrigation spatially. The modifications tocommercial machines are relatively straightforward, but costly; thus economic analyses have notbeen positive at current grain price: water cost ratios. However, with increased attention toconservation of water during drought, with increased contention for environmental, recreational,municipal, and industry use, or with regulatory constraints, conclusions regarding profitability ordesirability of variable-rate irrigation may change. The objectives of this paper are to: 1) defineand describe site-specific irrigation, 2) discuss the opportunities for conservation using sitespecificirrigation, 3) present case studies from production and research fields that illustratethese opportunities, and 4) discuss critical research needs to fully implement precision irrigationand thus realize these opportunities for conservation. The opportunities for conservationdiscussed include situations where non-cropped areas exist in a field for which irrigation can beturned completely off, situations where a reduced irrigation amount provides specific benefits,and finally, situations where optimizing irrigation amount to adapt to spatial productivityprovides quantitative benefits. Results from the case studies provide estimates of the potentialfor water conservation using precision irrigation that range from marginal to nearly 50 percent insingle years, and average from eight to 20 percent, depending on the previous irrigationmanagement strategy employed. Critical research needs include improved decision supportsystems and real-time monitoring and feedback to irrigation control.</style></abstract><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0191-172880.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>166</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Scharf,P.C.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Davis,J.G.</style></author><author><style face="normal" font="default"> Hubbard,V.C.</style></author><author><style face="normal" font="default"> Lory,J.A.</style></author></authors></contributors><auth-address><style face="normal" font="default">Univ Missouri, Dept Agron, Columbia, MO 65211 USAUSDA ARS, Cropping Syst &amp; Water Qual Res Unit, Columbia, MO 65211 USAUSDA, NRCS, Columbia, MO 65203 USA</style></auth-address><titles><title><style face="normal" font="default">Field-scale variability in optimal nitrogen fertilizer rate for corn</style></title><secondary-title><style face="normal" font="default">Agronomy Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Agronomy Journal</style></full-title></periodical><pages end="461" start="452">452-461</pages><volume><style face="normal" font="default">97</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">area</style></keyword><keyword><style face="normal" font="default"> COMBINABLE CROPS</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> DISCHARGE</style></keyword><keyword><style face="normal" font="default"> fertilizer</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> fields</style></keyword><keyword><style face="normal" font="default"> information</style></keyword><keyword><style face="normal" font="default"> losses</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> management systems</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> models</style></keyword><keyword><style face="normal" font="default"> N-fertilizer</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword><keyword><style face="normal" font="default"> PATTERN</style></keyword><keyword><style face="normal" font="default"> patterns</style></keyword><keyword><style face="normal" font="default"> RATES</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SPATIAL VARIABILITY</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> SYSTEMS</style></keyword><keyword><style face="normal" font="default"> TESTS</style></keyword><keyword><style face="normal" font="default"> TIME</style></keyword><keyword><style face="normal" font="default"> USDA</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> watersheds</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> YIELD RESPONSE</style></keyword><keyword><style face="normal" font="default"> Zea mays</style></keyword><keyword><style face="normal" font="default"> ZEA-MAYS</style></keyword><keyword><style face="normal" font="default"> ZONE</style></keyword></keywords><dates><year Day="0" Month="0" Year="2005">2005</year></dates><isbn><style face="normal" font="default">0002-1962</style></isbn><abstract><style face="normal" font="default">Applying only as much N fertilizer as is needed by a crop has economic and environmental benefits. Understanding variability in need for N fertilizer within individual fields is necessary to guide approaches to meeting crop needs while minimizing N inputs and losses. Our objective was to characterize the spatial variability of corn (Zea mays L.) N need in production corn fields. Eight experiments were conducted in three major soil areas (Mississippi Delta alluvial, deep loess, claypan) over 3 yr. Treatments were field-length strips of discrete N rates from 0 to 280 kg N ha(-1). Yield data were partitioned into 20-m increments, and a quadratic-plateau function was used to describe yield response to N rate for each 20-m section. Economically optimal N fertilizer rate (EONR) was very different between fields and was also highly variable within fields. Median EONR for individual fields ranged from 63 to 208 kg N ha(-1), indicating a need to manage N fertilizer differently for different fields. In seven of the eight fields, a uniform N application at the median EONR would cause more than half of the field to be over- or underfertilized by at least 34 kg N ha-1. Coarse patterns of spatial variability in EONR were observed in some fields, but fine and complex patterns were also observed in most fields. This suggests that the use of a few appropriate management zones per field might produce some benefits but that N management systems using spatially dense information have potential for greater benefits. Our results suggest that further attempts to develop systems for predicting and addressing spatially variable N needs are justified in these production environments</style></abstract><notes><style face="normal" font="default">Times Cited: 0ArticleEnglishScharf, P. CUniv Missouri, Dept Agron, Columbia, MO 65211 USACited References Count: 31911WPAMER SOC AGRONOMY677 S SEGOE RD, MADISON, WI 53711 USAMADISON</style></notes><urls><web-urls><url ppv-ref="no">ISI:000228037700014</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0166-158348.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>167</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Sudduth,K.A.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Wiebold,W.J.</style></author><author><style face="normal" font="default"> Batchelor,W.D.</style></author><author><style face="normal" font="default"> Bollero,G.A.</style></author><author><style face="normal" font="default"> Bullock,D.G.</style></author><author><style face="normal" font="default"> Clay,D.E.</style></author><author><style face="normal" font="default"> Palm,H.L.</style></author><author><style face="normal" font="default"> Pierce,F.J.</style></author><author><style face="normal" font="default"> Schuler,R.T.</style></author><author><style face="normal" font="default"> Thelen,K.D.</style></author></authors></contributors><auth-address><style face="normal" font="default">Univ Missouri, USDA ARS, Cropping Syst &amp; Water Qual Res Unit, Columbia, MO 65211 USAUniv Missouri, Dept Agron, Columbia, MO 65211 USAIowa State Univ, Dept Agr &amp; Biosyst Engn, Ames, IA 50011 USAUniv Illinois, Dept Crop Sci, Urbana, IL 61801 USAS Dakota State Univ, Dept Plant Sci, Brookings, SD 57007 USAWashington State Univ, Ctr Precis Agr Syst, Prosser, WA 99350 USAUniv Wisconsin, Dept Biol Syst Engn, Madison, WI 53706 USAMichigan State Univ, Dept Crop &amp; Soil Sci, E Lansing, MI 48824 USA</style></auth-address><titles><title><style face="normal" font="default">Relating apparent electrical conductivity to soil properties across the north-central USA</style></title><secondary-title><style face="normal" font="default">Computers and Electronics in Agriculture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Computers and Electronics in Agriculture</style></full-title></periodical><pages end="283" start="263">263-283</pages><volume><style face="normal" font="default">46</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">CAPACITY</style></keyword><keyword><style face="normal" font="default"> cation exchange capacity</style></keyword><keyword><style face="normal" font="default"> CLAY</style></keyword><keyword><style face="normal" font="default"> claypan soils</style></keyword><keyword><style face="normal" font="default"> correlation</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> depth</style></keyword><keyword><style face="normal" font="default"> determination</style></keyword><keyword><style face="normal" font="default"> electrical conductivity</style></keyword><keyword><style face="normal" font="default"> ELECTRICAL-CONDUCTIVITY</style></keyword><keyword><style face="normal" font="default"> ELECTROMAGNETIC INDUCTION TECHNIQUES</style></keyword><keyword><style face="normal" font="default"> EM38</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> fields</style></keyword><keyword><style face="normal" font="default"> Illinois</style></keyword><keyword><style face="normal" font="default"> Iowa</style></keyword><keyword><style face="normal" font="default"> layered soils</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> MANAGEMENT-PRACTICES</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> MODEL</style></keyword><keyword><style face="normal" font="default"> MOISTURE</style></keyword><keyword><style face="normal" font="default"> MULTIPLE LINEAR-REGRESSION</style></keyword><keyword><style face="normal" font="default"> NUMBER</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> precision agriculture</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> SALINITY</style></keyword><keyword><style face="normal" font="default"> SALT</style></keyword><keyword><style face="normal" font="default"> sampling</style></keyword><keyword><style face="normal" font="default"> sand</style></keyword><keyword><style face="normal" font="default"> sensor</style></keyword><keyword><style face="normal" font="default"> sensors</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil electrical conductivity</style></keyword><keyword><style face="normal" font="default"> soil moisture</style></keyword><keyword><style face="normal" font="default"> soil properties</style></keyword><keyword><style face="normal" font="default"> soil types</style></keyword><keyword><style face="normal" font="default"> SOIL-MOISTURE</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> SPATIAL PREDICTION</style></keyword><keyword><style face="normal" font="default"> STATES</style></keyword><keyword><style face="normal" font="default"> TIME</style></keyword><keyword><style face="normal" font="default"> United States</style></keyword><keyword><style face="normal" font="default"> UNITED-STATES</style></keyword><keyword><style face="normal" font="default"> USDA</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword><keyword><style face="normal" font="default"> Veris 3100</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> WATER-CONTENT</style></keyword></keywords><dates><year Day="0" Month="0" Year="2005">2005</year></dates><isbn><style face="normal" font="default">0168-1699</style></isbn><abstract><style face="normal" font="default">Apparent electrical conductivity (ECa) of the soil profile can be used as an indirect indicator of a number of soil physical and chemical properties. Commercially available ECa sensors can efficiently and inexpensively develop the spatially dense datasets desirable for describing within-field spatial soil variability in precision agriculture. The objective of this research was to relate ECa data to measured soil properties across a wide range of soil types, management practices, and climatic conditions. Data were collected with a non-contact, electromagnetic induction-based ECa sensor (Geonics EM38) and a coulter-based sensor (Veris 3100) on 12 fields in 6 states of the north-central United States. At 12-20 sampling sites in each field, 120-cm deep soil cores were obtained and used for soil property determination. Within individual fields, EM38 data collected in the vertical dipole orientation (0-150 cm depth) and Veris 3100 deep (0-100cm depth) data were most highly correlated. Differences between ECa sensors were more pronounced on more layered soils, such as the claypan soils of the Missouri fields, due to differences in depth-weighted sensor response curves. Correlations of ECa with clay content and cation exchange capacity (CEC) were generally highest and most persistent across all fields and ECa data types. Other soil properties (soil moisture, silt, sand, organic C, and paste EC) were strongly related to ECa in some study fields but not in others. Regressions estimating clay and CEC as a function of ECa, across all study fields were reasonably accurate (r(2) >= 0.55). Thus, it may be feasible to develop relationships between ECa and clay and CEC that are applicable across a wide range of soil and climatic conditions. (c) 2004 Elsevier B.V. All rights reserved</style></abstract><notes><style face="normal" font="default">Times Cited: 1ArticleEnglishSudduth, K. AUniv Missouri, USDA ARS, Cropping Syst &amp; Water Qual Res Unit, 269 Agr Engn Bldg, Columbia, MO 65211 USACited References Count: 37908XOELSEVIER SCI LTDTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDOXFORD</style></notes><urls><web-urls><url ppv-ref="no">ISI:000227823700011</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0167-148589.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>190</rec-number><ref-type name="Magazine Article">16</ref-type><contributors><authors><author><style face="normal" font="default">Sudduth,K.A.</style></author><author><style face="normal" font="default"> Chung,S.O.</style></author></authors></contributors><titles><title><style face="normal" font="default">The compaction problem: Sensors address soil compaction variations.</style></title><secondary-title><style face="normal" font="default">Resource</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Resource</style></full-title></periodical><pages end="10" start="9">9-10</pages><volume><style face="normal" font="default">12</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">compaction</style></keyword><keyword><style face="normal" font="default"> sensor</style></keyword><keyword><style face="normal" font="default"> sensors</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil compaction</style></keyword><keyword><style face="normal" font="default"> variation</style></keyword></keywords><dates><year Day="0" Month="0" Year="2005">2005</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0190-sudduth.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>215</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Vories,E.D.</style></author><author><style face="normal" font="default"> Tacker,P.L.</style></author><author><style face="normal" font="default"> Hogan,R.</style></author></authors></contributors><titles><title><style face="normal" font="default">Multiple inlet approach to reduce water requirements for rice production</style></title><secondary-title><style face="normal" font="default">Applied Engineering in Agriculture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Applied Engineering in Agriculture</style></full-title></periodical><pages end="616" start="611">611-616</pages><volume><style face="normal" font="default">21</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">RICE</style></keyword><keyword><style face="normal" font="default"> water</style></keyword></keywords><dates><year Day="0" Month="0" Year="2005">2005</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0215-174368.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>214</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Zdor,R.E.</style></author><author><style face="normal" font="default"> Alexander,C.M.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Weed suppression by deleterious rhizobacteria is affected by soil type and formulation</style></title><secondary-title><style face="normal" font="default">Communications in Soil Science and Plant Analysis</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Communications in Soil Science and Plant Analysis</style></full-title></periodical><pages end="1299" start="1289">1289-1299</pages><volume><style face="normal" font="default">36</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">DELETERIOUS RHIZOBACTERIA</style></keyword><keyword><style face="normal" font="default"> RHIZOBACTERIA</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SUPPRESSION</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword></keywords><dates><year Day="0" Month="0" Year="2005">2005</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0214-147110.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>170</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Adamchuk,V.I.</style></author><author><style face="normal" font="default"> Hummel,J.W.</style></author><author><style face="normal" font="default"> Morgan,M.T.</style></author><author><style face="normal" font="default"> Upadhyaya,S.K.</style></author></authors></contributors><auth-address><style face="normal" font="default">Univ Nebraska, Biol Syst Engn Dept, Lincoln, NE 68583 USAUSDA, ARS, Cropping Syst &amp; Water Qual Res Unit, Columbia, MO 65211 USAPurdue Univ, Dept Food Sci, W Lafayette, IN 47907 USAUniv Calif Davis, Dept Biol &amp; Agr Engn, Davis, CA 95616 USA</style></auth-address><titles><title><style face="normal" font="default">On-the-go soil sensors for precision agriculture</style></title><secondary-title><style face="normal" font="default">Computers and Electronics in Agriculture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Computers and Electronics in Agriculture</style></full-title></periodical><pages end="91" start="71">71-91</pages><volume><style face="normal" font="default">44</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">characteristics</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> crop production</style></keyword><keyword><style face="normal" font="default"> decision making</style></keyword><keyword><style face="normal" font="default"> ELECTRICAL-CONDUCTIVITY</style></keyword><keyword><style face="normal" font="default"> electromagnetic induction</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> GROUND-PENETRATING RADAR</style></keyword><keyword><style face="normal" font="default"> information</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> mapping soil properties</style></keyword><keyword><style face="normal" font="default"> measurement</style></keyword><keyword><style face="normal" font="default"> MECHANICAL IMPEDANCE</style></keyword><keyword><style face="normal" font="default"> Nebraska</style></keyword><keyword><style face="normal" font="default"> ORGANIC-MATTER</style></keyword><keyword><style face="normal" font="default"> precision agriculture</style></keyword><keyword><style face="normal" font="default"> prediction</style></keyword><keyword><style face="normal" font="default"> QUALITY</style></keyword><keyword><style face="normal" font="default"> reflectance</style></keyword><keyword><style face="normal" font="default"> sensor</style></keyword><keyword><style face="normal" font="default"> sensors</style></keyword><keyword><style face="normal" font="default"> site specific management</style></keyword><keyword><style face="normal" font="default"> site-specific</style></keyword><keyword><style face="normal" font="default"> site-specific management</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil properties</style></keyword><keyword><style face="normal" font="default"> soil sensors</style></keyword><keyword><style face="normal" font="default"> SPECTROPHOTOMETER</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> technology</style></keyword><keyword><style face="normal" font="default"> TIME</style></keyword><keyword><style face="normal" font="default"> USDA</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> WATER-CONTENT</style></keyword></keywords><dates><year Day="0" Month="0" Year="2004">2004</year></dates><isbn><style face="normal" font="default">0168-1699</style></isbn><abstract><style face="normal" font="default">The basic objectives of site-specific management of agricultural inputs are to increase profitability of crop production, improve product quality, and protect the environment. Information about the variability of different soil attributes within a field is essential for the decision-making process. The inability to obtain soil characteristics rapidly and inexpensively remains one of the biggest limitations of precision agriculture. Numerous researchers and manufacturers have attempted to develop on-the-go soil sensors to measure mechanical, physical and chemical soil properties. The sensors have been based on electrical and electromagnetic, optical and radiometric, mechanical, acoustic, pneumatic, and electrochemical measurement concepts. While only electric and electromagnetic sensors are widely used at this time, other technologies presented in this review may also be suitable to improve the quality of soil-related information in the near future. (C) 2004 Elsevier B.V. All rights reserved</style></abstract><notes><style face="normal" font="default">Times Cited: 0ArticleEnglishAdamchuk, V. IUniv Nebraska, Biol Syst Engn Dept, Lincoln, NE 68583 USACited References Count: 90836KBELSEVIER SCI LTDTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDOXFORD</style></notes><urls><web-urls><url ppv-ref="no">ISI:000222553300006</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0170-adamchuk.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>169</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Adams,B.T.</style></author><author><style face="normal" font="default"> Reid,J.F.</style></author><author><style face="normal" font="default"> Hummel,J.W.</style></author><author><style face="normal" font="default"> Zhang,Q.</style></author><author><style face="normal" font="default"> Hoeft,R.G.</style></author></authors></contributors><auth-address><style face="normal" font="default">Univ Missouri, Columbia, MO 65211 USAJohn Deere Technol Ctr, Moline, IL 61265 USAARS, USDA, Columbia, MO 65211 USAUniv Illinois, Urbana, IL 61801 USA</style></auth-address><titles><title><style face="normal" font="default">Effects of central tire inflation systems on ride quality of agricultural vehicles</style></title><secondary-title><style face="normal" font="default">Journal of Terramechanics</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Terramechanics</style></full-title></periodical><pages end="207" start="199">199-207</pages><volume><style face="normal" font="default">41</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">central tire inflation</style></keyword><keyword><style face="normal" font="default"> comfort</style></keyword><keyword><style face="normal" font="default"> CTIS</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> fields</style></keyword><keyword><style face="normal" font="default"> Illinois</style></keyword><keyword><style face="normal" font="default"> instrumentation</style></keyword><keyword><style face="normal" font="default"> ISO2631</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> pressure</style></keyword><keyword><style face="normal" font="default"> QUALITY</style></keyword><keyword><style face="normal" font="default"> ride</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> SYSTEMS</style></keyword><keyword><style face="normal" font="default"> TIME</style></keyword><keyword><style face="normal" font="default"> tractor</style></keyword><keyword><style face="normal" font="default"> USDA</style></keyword></keywords><dates><year Day="0" Month="0" Year="2004">2004</year></dates><isbn><style face="normal" font="default">0022-4898</style></isbn><abstract><style face="normal" font="default">Instrumentation to collect ISO2631 ride data was installed on a CaseIH 8950 tractor equipped with a central tire inflation system (CTIS). Data were collected at two speeds on three courses representing degraded secondary roads, moderately rough fields, and the toughest of farming conditions. Reductions in tire pressures available with central tire inflation resulted in greater tire deflections and, consequently, a smoother ride. The CTIS improved the ride of the vehicle by 99% over properly inflated tires on average, and by 177% when not in resonance. (C) 2004 ISTVS. Published by Elsevier Ltd. All rights reserved</style></abstract><notes><style face="normal" font="default">Times Cited: 0ArticleEnglishAdams, B. TUniv Missouri, 234 Agr Engn Bldg, Columbia, MO 65211 USACited References Count: 12860BFPERGAMON-ELSEVIER SCIENCE LTDTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDOXFORD</style></notes><urls><web-urls><url ppv-ref="no">ISI:000224311700002</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0169-153500.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>2</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Blanco-Canqui,H.</style></author><author><style face="normal" font="default"> Gantzer,C.J.</style></author><author><style face="normal" font="default"> Anderson,S.H.</style></author><author><style face="normal" font="default"> Alberts,E.E.</style></author></authors></contributors><titles><title><style face="normal" font="default">Grass barriers for reduced concentrated flow induced soil and nutrient loss</style></title><secondary-title><style face="normal" font="default">Soil Science Society of America Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil Science Society of America Journal</style></full-title></periodical><pages end="1972" start="1963">1963-1972</pages><volume><style face="normal" font="default">68</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">area</style></keyword><keyword><style face="normal" font="default"> BUFFERS</style></keyword><keyword><style face="normal" font="default"> EROSION</style></keyword><keyword><style face="normal" font="default"> HEDGES</style></keyword><keyword><style face="normal" font="default"> losses</style></keyword><keyword><style face="normal" font="default"> nutrients</style></keyword><keyword><style face="normal" font="default"> performance</style></keyword><keyword><style face="normal" font="default"> phosphorus</style></keyword><keyword><style face="normal" font="default"> removal</style></keyword><keyword><style face="normal" font="default"> runoff</style></keyword><keyword><style face="normal" font="default"> SEDIMENT</style></keyword><keyword><style face="normal" font="default"> sediment deposition</style></keyword><keyword><style face="normal" font="default"> slope</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> TILLAGE SYSTEMS</style></keyword><keyword><style face="normal" font="default"> VEGETATIVE FILTER STRIPS</style></keyword><keyword><style face="normal" font="default"> water</style></keyword></keywords><dates><year Day="0" Month="0" Year="2004">2004</year></dates><abstract><style face="normal" font="default">Vegetative filter strips (FS) perform poorly for reducing losses of sediment and nutrients in concentrated flow. Stiff-stemmed grass barriers (B-FS) above the FS may be a companion treatment to improve the FS performance. This study evaluated the effectiveness of warm-season switchgrass (Panicum virgatum L.) barriers planted above fescue (Festuca arundinacea Schreb.) FS in reducing runoff water, sediment, N, and P losses in concentrated flow from an Aeric Vertic Epiaqualf on a 5% slope. Simulated rainfall was applied on plots consisting of a 1.5-m-wide by 8-m-long pollutant source area with an artificially constructed channel to concentrate surface runoff. The source area was bounded downslope by either an 8-m long fescue FS or 0.7 m of active or dormant barrier above a 7.3-m-long fescue FS. The B-FS treatment also reduced sediment loss by 91% while the FS reduced sediment by only 72% (P &lt; 0.01). The B-FS also reduced sediment loss by 90%, whereas FS reduced sediment only 60% when inflow was added to the plots. The B-FS trapped 4.9 times more organic N, 2.3 times more NH4-N, and 3.7 times more particulate P than FS at 0.7 in (P &lt; 0.01). Sediment and nutrient trapping increased significantly with FS length. Switchgrass barriers above the FS dispersed and temporarily ponded concentrated runoff, enabling increased sediment deposition. Barriers may be a potential conservation strategy for rehabilitation of lands affected with concentrated flow where traditional practices are inadequate</style></abstract><notes><style face="normal" font="default">JArticleNOV-DECDiscipline: AGRICULTURE, SOIL Discipline: IENCE</style></notes><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0002-157100.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>16</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Blanco-Canqui,H.</style></author><author><style face="normal" font="default"> Gantzer,C.J.</style></author><author><style face="normal" font="default"> Anderson,S.H.</style></author><author><style face="normal" font="default"> Alberts,E.E.</style></author></authors></contributors><titles><title><style face="normal" font="default">Tillage and crop influences on physical properties for an Epiaqualf</style></title><secondary-title><style face="normal" font="default">Soil Science Society of America Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil Science Society of America Journal</style></full-title></periodical><pages end="576" start="567">567-576</pages><volume><style face="normal" font="default">68</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">bulk density</style></keyword><keyword><style face="normal" font="default"> CONSERVATION TILLAGE</style></keyword><keyword><style face="normal" font="default"> CONVENTIONAL TILLAGE</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> depth</style></keyword><keyword><style face="normal" font="default"> EROSION</style></keyword><keyword><style face="normal" font="default"> fallow</style></keyword><keyword><style face="normal" font="default"> HYDRAULIC CONDUCTIVITY</style></keyword><keyword><style face="normal" font="default"> infiltration</style></keyword><keyword><style face="normal" font="default"> LOAM</style></keyword><keyword><style face="normal" font="default"> LONG-TERM TILLAGE</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> no-till</style></keyword><keyword><style face="normal" font="default"> no-tillage</style></keyword><keyword><style face="normal" font="default"> organic matter</style></keyword><keyword><style face="normal" font="default"> ORGANIC-MATTER</style></keyword><keyword><style face="normal" font="default"> PHYSICAL-PROPERTIES</style></keyword><keyword><style face="normal" font="default"> position</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> runoff</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil properties</style></keyword><keyword><style face="normal" font="default"> soil water</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> tillage</style></keyword><keyword><style face="normal" font="default"> Zea mays</style></keyword><keyword><style face="normal" font="default"> ZEA-MAYS</style></keyword></keywords><dates><year Day="0" Month="0" Year="2004">2004</year></dates><abstract><style face="normal" font="default">Tillage impacts on soil properties differ among soils. This study investigated tillage, cropping, and wheel traffic (WT) effects of 13-yr of no-tillage (N'T), chisel plow (CP), and moldboard plow (MP) under continuous corn (Zea mays L.) and soybean (Glycine mar L.) including a check treatment of continuous cultivated fallow (CCF) on bulk density (rho(b)), organic matter (OM), soil-water retention, and saturated hydraulic conductivity (K-sat) on a Mexico silt loam (fine, smectitic, mesic, Aeric Vertic Epiaqualf). Possible relationships between runoff and effective K-sat (K-eff) were also studied. Soil properties were determined on intact cores of 76-mm diam. collected from trafficked and nontrafficked positions for the 0- to 100-mm and 100- to 200-mm depths from the Midwest Research Claypan Farm erosion plots near Kingdom City, MO. Results show that the CCF had lower rho(b), OM, K-sat, and higher surface runoff than other treatments (P &lt; 0.01). Tillage effects on soil properties among NT, CP, and MP were small and crop dependent. Corn had lower K-sat (7.3 mm h(-1)) than soybean (11.7 mm h(-1); P &lt; 0.01). Conversely, corn had slightly higher rho(b) (1.53 Mg m(-3)) than soybean (1.48 Mg m(-3); P &lt; 0.01). The rho(b) increased from 1.47 to 1.52 Mg m(-3) and OM decreased from 15.5 to 14.0 g kg(-1) with depth (P &lt; 0.01). Wheel traffic reduced K-sat, by three times and increased rho(b) by 6% (P &lt; 0.01). Bulk density was a significant predictor of log K-sat, (P &lt; 0.01) but not for soils under CCF management. The K-eff was not related to runoff with the exception of the CCF treatment, which had slightly more runoff and lower K-eff (P &lt; 0.05). Overall, tillage treatments had no significant effects on soil properties; however, cropping and WT had small significant effects on rho(b) and K-sat</style></abstract><notes><style face="normal" font="default">JArticleMAR-APRDiscipline: AGRICULTURE, SOIL Discipline: IENCE</style></notes><urls><web-urls><url ppv-ref="no">ISI:000220040700028</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0016-blancocanqui.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>7</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Blanco-Canqui,H.</style></author><author><style face="normal" font="default"> Gantzer,C.J.</style></author><author><style face="normal" font="default"> Anderson,S.H.</style></author><author><style face="normal" font="default"> Alberts,E.E.</style></author><author><style face="normal" font="default"> Thompson,A.L.</style></author></authors></contributors><titles><title><style face="normal" font="default">Grass barrier and vegetative filter strip effectiveness in reducing runoff, sediment, nitrogen, and phosphorus loss</style></title><secondary-title><style face="normal" font="default">Soil Science Society of America Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil Science Society of America Journal</style></full-title></periodical><pages end="1678" start="1670">1670-1678</pages><volume><style face="normal" font="default">68</style></volume><number><style face="normal" font="default">5</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">area</style></keyword><keyword><style face="normal" font="default"> design</style></keyword><keyword><style face="normal" font="default"> EROSION</style></keyword><keyword><style face="normal" font="default"> fallow</style></keyword><keyword><style face="normal" font="default"> HEDGES</style></keyword><keyword><style face="normal" font="default"> losses</style></keyword><keyword><style face="normal" font="default"> MULTISPECIES RIPARIAN BUFFER</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword><keyword><style face="normal" font="default"> nutrients</style></keyword><keyword><style face="normal" font="default"> patterns</style></keyword><keyword><style face="normal" font="default"> performance</style></keyword><keyword><style face="normal" font="default"> phosphorus</style></keyword><keyword><style face="normal" font="default"> removal</style></keyword><keyword><style face="normal" font="default"> runoff</style></keyword><keyword><style face="normal" font="default"> SEDIMENT</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SOIL LOSS</style></keyword><keyword><style face="normal" font="default"> species</style></keyword><keyword><style face="normal" font="default"> transport</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword><keyword><style face="normal" font="default"> VEGETATIVE FILTER STRIPS</style></keyword></keywords><dates><year Day="0" Month="0" Year="2004">2004</year></dates><abstract><style face="normal" font="default">Addition of switchgrass (Panicum virgatum) barriers to vegetative filter strips (FS) shows potential as conservation practice. This study evaluates the comparative effectiveness of three conservation practices in reducing runoff, sediment, N, and P losses from 1.5- by 16-m plots on an Aeric Epiaqualf. Three practices compared are a traditional fescue (Festuca arundinacea) filter strip (Fescue-FS), a switchgrass barrier in combination with the Fescue-FS (B-Fescue-FS) and a switchgrass barrier in combination with a native grass and forbs species filter strip (B-Native-FS). This study also predicts transport of sediment, N, and P in Fescue-FS and B-Fescue-FS. Fescue-FS and B-Fescue-FS of equal widths (0.7 m) significantly reduced runoff and sediment transport as compared with a continuous cultivated fallow (CCF) treatment, but B-Fescue-FS was more effective for reducing runoff (p &lt; 0.05) and sediment (p &lt; 0.01) transport. B-Fescue-FS was also more effective than Fescue-FS for reducing losses of organic N, NO3-N, NH4-N, particulate P, and PO4-P (p &lt; 0.01). Fescue-FS and B-Native-FS were equally effective for reducing runoff, sediment, and nutrient loss. Effectiveness of FS increased with distance with 18% of runoff, 92% of sediment, and 71% of nutrient leaving the source area being reduced in the first 4 m of the FS. An equation to predict sediment associated with runoff ponding above barriers explained approximately 70% of the variability between measured and predicted values of sediment, organic N, and particulate P transport. Combination of switchgrass barriers with FS is an effective alternative to Fescue-FS alone for reducing sediment and nutrients in runoff</style></abstract><notes><style face="normal" font="default">JArticleSEP-OCTDiscipline: AGRICULTURE, SOIL Discipline: IENCE</style></notes><urls><web-urls><url ppv-ref="no">ISI:000223817500023</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0007-154368.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>188</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Chung,S.O.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Characterization of cone index and tillage draft cata to define design parameters for an on-the-go soil strength profile sensor</style></title><secondary-title><style face="normal" font="default">Agricultural and Biosystems Engineering</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Agricultural and Biosystems Engineering</style></full-title></periodical><pages end="20" start="10">10-20</pages><volume><style face="normal" font="default">5</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">characterization</style></keyword><keyword><style face="normal" font="default"> cone index</style></keyword><keyword><style face="normal" font="default"> design</style></keyword><keyword><style face="normal" font="default"> sensor</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil strength</style></keyword><keyword><style face="normal" font="default"> strength</style></keyword><keyword><style face="normal" font="default"> tillage</style></keyword></keywords><dates><year Day="0" Month="0" Year="2004">2004</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0188-171381.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>6</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author><author><style face="normal" font="default"> Archer,D.</style></author><author><style face="normal" font="default"> Johnson,W.G.</style></author><author><style face="normal" font="default"> Nelson,K.</style></author></authors></contributors><titles><title><style face="normal" font="default">Zone herbicide application controls annual weeds and reduces residual herbicide use in corn</style></title><secondary-title><style face="normal" font="default">Weed Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Science</style></full-title></periodical><pages end="833" start="821">821-833</pages><volume><style face="normal" font="default">52</style></volume><number><style face="normal" font="default">5</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">alachlor</style></keyword><keyword><style face="normal" font="default"> atrazine</style></keyword><keyword><style face="normal" font="default"> banded herbicide</style></keyword><keyword><style face="normal" font="default"> banding</style></keyword><keyword><style face="normal" font="default"> competition</style></keyword><keyword><style face="normal" font="default"> contamination</style></keyword><keyword><style face="normal" font="default"> controls</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> CRITICAL PERIOD</style></keyword><keyword><style face="normal" font="default"> crops</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> GRAIN-YIELD</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> INJURY</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> metolachlor</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> RATES</style></keyword><keyword><style face="normal" font="default"> reduced rates</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> species</style></keyword><keyword><style face="normal" font="default"> sprayer</style></keyword><keyword><style face="normal" font="default"> summer</style></keyword><keyword><style face="normal" font="default"> surface water</style></keyword><keyword><style face="normal" font="default"> tillage</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> weed management</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> yields</style></keyword><keyword><style face="normal" font="default"> ZEA-MAYS</style></keyword><keyword><style face="normal" font="default"> zone herbicide application</style></keyword></keywords><dates><year Day="0" Month="0" Year="2004">2004</year></dates><abstract><style face="normal" font="default">To minimize the chance of surface water contamination by herbicides, farmers need alternative ways to manage weeds in field crops, such as field corn, that reduce herbicide use. Zone herbicide application (ZHA) reduces herbicide use compared with conventional broadcast herbicide application by (1) banding low herbicide rates between corn rows (less than or equal to 1X normal broadcast registered rate), (2) managing crops to favor crop competition, and (3) banding very low herbicide rates over crop rows (much less than 1x normal rate). The research goal was to compare the relative effectiveness of reduced-rate ZRA with broadcast herbicide application on in-row (IR) and between-row (BR) summer annual weed cover (chiefly giant foxtail and waterhemp species), grain yields, and net returns resulting from herbicide application in field corn. Pre-emergence ZHA of atrazine + metolachlor + clopyralid + flumesulam was made in zones (i.e., even width bands) at different rates between and over crop rows for three site-years in Missouri, and the 1X rate was 2.24 + 1.75 + 0.211 + 0.067 kg ai ha(-1), respectively. Best ZFIA treatments (0.29X to 0.30X IR herbicide rates + 0.74X to 0.80X BR herbicide rates) outperformed all reduced-rate broadcast herbicide treatments (0.25X, 0.5X, and 0.75X) based on net returns in partial budget analysis. Yields for highest yielding ZHA could not be distinguished from the 1 X broadcast treatments in two of three site-years. Net returns due to herbicide application for the highest yielding ZHA were comparable with the I X broadcast treatment in all three site-years. For the best ZHA, the 3-yr average for total herbicide applied per unit was 53% of the 1X broadcast rate. ZHA may provide row crop farmers with a new generic option for reducing herbicide rates and input costs while maintaining net returns and reducing the chance of surface water contamination by herbicides</style></abstract><notes><style face="normal" font="default">JArticleSEP-OCTDiscipline: AGRONOMY; PLANT Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:000223970400019</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0006-157891.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>5</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author><author><style face="normal" font="default"> Johnson,W.G.</style></author><author><style face="normal" font="default"> Nelson,K.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">In-row and between-row interference by corn modifies annual weed control by preemergence residual herbicide</style></title><secondary-title><style face="normal" font="default">Weed Technology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Technology</style></full-title></periodical><pages end="504" start="497">497-504</pages><volume><style face="normal" font="default">18</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">AMARANTHUS-RETROFLEXUS</style></keyword><keyword><style face="normal" font="default"> AMBEL</style></keyword><keyword><style face="normal" font="default"> ATATA</style></keyword><keyword><style face="normal" font="default"> atrazine</style></keyword><keyword><style face="normal" font="default"> band herbicide application</style></keyword><keyword><style face="normal" font="default"> banding</style></keyword><keyword><style face="normal" font="default"> COMMON COCKLEBUR</style></keyword><keyword><style face="normal" font="default"> competition</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> CRITICAL PERIOD</style></keyword><keyword><style face="normal" font="default"> crops</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> models</style></keyword><keyword><style face="normal" font="default"> POLPE</style></keyword><keyword><style face="normal" font="default"> position</style></keyword><keyword><style face="normal" font="default"> prediction</style></keyword><keyword><style face="normal" font="default"> reduced rate herbicide</style></keyword><keyword><style face="normal" font="default"> RELATIVE LEAF COVER</style></keyword><keyword><style face="normal" font="default"> SETFA</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SOYBEAN GLYCINE-MAX</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> weed control</style></keyword><keyword><style face="normal" font="default"> XANST</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> ZEA-MAYS YIELD</style></keyword><keyword><style face="normal" font="default"> ZEAMX</style></keyword></keywords><dates><year Day="0" Month="0" Year="2004">2004</year></dates><abstract><style face="normal" font="default">The presence of row crops, such as field corn, improves herbicidal control of weeds, but the impact of crop row position on herbicide dose-response relationships for weeds is unknown. At midseason at three site-years in Missouri, total weed cover (WC) was reduced by increasing soil residual herbicide rate in a dose-dependent response and was as much as 20% lower in-row (IR) than between-row (BR). Preemergence atrazine + S-metolachlor + clopyralid + flumetsulam at different rates (0 X, 0.25 X, 0.5 X, 0.75 X, and 1 X, where 1 X rate was 2,240 + 1,750 + 210 + 67 g ai/ha, respectively) were applied at planting in field corn to control giant foxtail, the chief weed present, and annual broadleaf weeds, largely common waterhemp. Lower herbicide rates were required to reduce IR WC to the same extent as BR WC, but these rates varied between site-years. At all three site-years, a least squares regression equation adequately described data variability relating corn yield to IR or BR WC (or both) (i.e., Y = a + bBR(2), where Y is corn yield in kg/ha, BR is BR WC [%], and a and b are coefficients)</style></abstract><notes><style face="normal" font="default">JArticleJUL-SEPDiscipline: AGRONOMY; PLANT Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:000224378800003</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0005-141921.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>18</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Fridgen,J.J.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Drummond,S.T.</style></author><author><style face="normal" font="default"> Wiebold,W.J.</style></author><author><style face="normal" font="default"> Fraisse,C.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Management Zone Analyst (MZA): Software for subfield management zone delineation</style></title><secondary-title><style face="normal" font="default">Agronomy Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Agronomy Journal</style></full-title></periodical><pages end="108" start="100">100-108</pages><volume><style face="normal" font="default">96</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">area</style></keyword><keyword><style face="normal" font="default"> CLASSIFICATION</style></keyword><keyword><style face="normal" font="default"> claypan soils</style></keyword><keyword><style face="normal" font="default"> crop management</style></keyword><keyword><style face="normal" font="default"> crop yield</style></keyword><keyword><style face="normal" font="default"> electrical conductivity</style></keyword><keyword><style face="normal" font="default"> ELECTRICAL-CONDUCTIVITY</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> fields</style></keyword><keyword><style face="normal" font="default"> FUZZY-SETS</style></keyword><keyword><style face="normal" font="default"> information</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> performance</style></keyword><keyword><style face="normal" font="default"> site-specific</style></keyword><keyword><style face="normal" font="default"> slope</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil electrical conductivity</style></keyword><keyword><style face="normal" font="default"> SOIL ELECTRICAL-CONDUCTIVITY</style></keyword><keyword><style face="normal" font="default"> statistics</style></keyword><keyword><style face="normal" font="default"> topography</style></keyword></keywords><dates><year Day="0" Month="0" Year="2004">2004</year></dates><abstract><style face="normal" font="default">Producers using site-specific crop management (SSCM) have a need for strategies to delineate areas within fields to which management can be tailored. These areas are often referred to as management zones. Quick and automated procedures are desirable for creating management zones and for testing the question of the number of zones to create. A software program called Management Zone Analyst (MZA) was developed using a fuzzy c-means unsupervised clustering algorithm that assigns field information into like classes, or potential management zones. An advantage of MZA over many other software programs is that it provides concurrent output for a range of cluster numbers so that the user can evaluate how many management zones should be used. Management Zone Analyst was developed using Microsoft Visual Basic 6.0 and operates on any computer with Microsoft Windows (95 or newer). Concepts and theory behind MZA are presented as are the sequential steps of the program. Management Zone Analyst calculates descriptive statistics, performs the unsupervised fuzzy classification procedure for a range of cluster numbers, and provides the user with two performance indices [fuzziness performance index (FPI) and normalized classification entropy (NCE)] to aid in deciding how many clusters are most appropriate for creating management zones. Example MZA output is provided for two Missouri clay-pan soil fields using soil electrical conductivity, slope, and elevation as clustering variables. Management Zone Analyst performance indices indicated that one field should be divided into either two (using NCE) or four (using FPI) management zones and the other field should be divided into four (using NCE or FPI) management zones</style></abstract><notes><style face="normal" font="default">JArticleJAN-FEBDiscipline: AGRONOMY</style></notes><urls><web-urls><url ppv-ref="no">ISI:000188437400011</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0018-138934.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>219</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Hong,S.Y.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Fraisse,C.W.</style></author><author><style face="normal" font="default"> Palm,H.L.</style></author><author><style face="normal" font="default"> Wiebold,W.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Comparison of remote sensing and crop growth models for estimating within-field LAI variability.</style></title><secondary-title><style face="normal" font="default">Korean Journal of Remote Sensing</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Korean Journal of Remote Sensing</style></full-title></periodical><pages end="188" start="175">175-188</pages><volume><style face="normal" font="default">20</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">CROP</style></keyword><keyword><style face="normal" font="default"> crop growth models</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> growth models</style></keyword><keyword><style face="normal" font="default"> LAI</style></keyword><keyword><style face="normal" font="default"> MODEL</style></keyword><keyword><style face="normal" font="default"> models</style></keyword><keyword><style face="normal" font="default"> remote sensing</style></keyword><keyword><style face="normal" font="default"> sensing</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword></keywords><dates><year Day="0" Month="0" Year="2004">2004</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0219-165588.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>8</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Hummel,J.W.</style></author><author><style face="normal" font="default"> Ahmad,I.S.</style></author><author><style face="normal" font="default"> Newman,S.C.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Drummond,S.T.</style></author></authors></contributors><titles><title><style face="normal" font="default">Simultaneous soil moisture and cone index measurement</style></title><secondary-title><style face="normal" font="default">Transactions of the Asae</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the Asae</style></full-title></periodical><pages end="618" start="607">607-618</pages><volume><style face="normal" font="default">47</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">agricultural engineering</style></keyword><keyword><style face="normal" font="default"> area</style></keyword><keyword><style face="normal" font="default"> bulk density</style></keyword><keyword><style face="normal" font="default"> characteristics</style></keyword><keyword><style face="normal" font="default"> compaction</style></keyword><keyword><style face="normal" font="default"> cone index</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> infiltration</style></keyword><keyword><style face="normal" font="default"> maps</style></keyword><keyword><style face="normal" font="default"> measurement</style></keyword><keyword><style face="normal" font="default"> MOISTURE</style></keyword><keyword><style face="normal" font="default"> near infrared</style></keyword><keyword><style face="normal" font="default"> near infrared reflectance</style></keyword><keyword><style face="normal" font="default"> near-infrared</style></keyword><keyword><style face="normal" font="default"> ORGANIC-MATTER</style></keyword><keyword><style face="normal" font="default"> penetration</style></keyword><keyword><style face="normal" font="default"> reflectance</style></keyword><keyword><style face="normal" font="default"> sensors</style></keyword><keyword><style face="normal" font="default"> site-specific</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil compaction</style></keyword><keyword><style face="normal" font="default"> soil cone index</style></keyword><keyword><style face="normal" font="default"> soil moisture</style></keyword><keyword><style face="normal" font="default"> soil penetration resistance</style></keyword><keyword><style face="normal" font="default"> soil strength maps</style></keyword><keyword><style face="normal" font="default"> soil types</style></keyword><keyword><style face="normal" font="default"> SPECTROPHOTOMETER</style></keyword><keyword><style face="normal" font="default"> tillage</style></keyword><keyword><style face="normal" font="default"> variation</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> yield monitor</style></keyword></keywords><dates><year Day="0" Month="0" Year="2004">2004</year></dates><abstract><style face="normal" font="default">Soil compaction can restrict root growth and water infiltration, resulting in yield reduction. Maps of yield monitor data aid in visualization of variations in yield, without identifying underlying factors for these variations. Soil penetration resistance can help identify areas where soil physical characteristics are negatively impacting yield. However, penetration resistance is a function of soil moisture content and soil type as well as compaction. A standard penetrometer cone was modified to collect near-infrared reflectance and estimate moisture content. The instrument was tested in the laboratory on a selection of soil types with varying moisture tension levels using stepwise and continuous probe insertions. Soil moisture, dry bulk density, and clay content were significant variables in predicting soil cone index at the lower moisture tension level</style></abstract><notes><style face="normal" font="default">JArticleMAY-JUNDiscipline: AGRICULTURAL ENGINEERING</style></notes><urls><web-urls><url ppv-ref="no">ISI:000223743300002</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0008-143155.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>228</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kremer,R.J.</style></author><author><style face="normal" font="default"> Motavalli,P.P.</style></author></authors></contributors><titles><title><style face="normal" font="default">Environmental impacts of transgenic crops</style></title><secondary-title><style face="normal" font="default">Journal of Environmental Quality</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Environmental Quality</style></full-title></periodical><pages end="" start="805">805-</pages><volume><style face="normal" font="default">33</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">IMPACT</style></keyword><keyword><style face="normal" font="default"> crops</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword></keywords><dates><year Day="0" Month="0" Year="2004">2004</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0228-kremer.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>3</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lin,C.H.</style></author><author><style face="normal" font="default"> Lerch,R.N.</style></author><author><style face="normal" font="default"> Garrett,H.E.</style></author><author><style face="normal" font="default"> George,M.F.</style></author></authors></contributors><titles><title><style face="normal" font="default">Incorporating forage grasses in riparian buffers for bioremediation of atrazine, isoxaflutole and nitrate in Missouri</style></title><secondary-title><style face="normal" font="default">Agroforestry Systems</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Agroforestry Systems</style></full-title></periodical><pages end="99" start="91">91-99</pages><volume><style face="normal" font="default">63</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">ADSORPTION</style></keyword><keyword><style face="normal" font="default"> atrazine</style></keyword><keyword><style face="normal" font="default"> benzoic acid metabolite</style></keyword><keyword><style face="normal" font="default"> BUFFERS</style></keyword><keyword><style face="normal" font="default"> dealkylation</style></keyword><keyword><style face="normal" font="default"> diketonitrile metabolite</style></keyword><keyword><style face="normal" font="default"> extraction</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> forage</style></keyword><keyword><style face="normal" font="default"> herbicide degradation</style></keyword><keyword><style face="normal" font="default"> HERBICIDE ISOXAFLUTOLE</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> HYDROLYSIS</style></keyword><keyword><style face="normal" font="default"> HYDROXYATRAZINE</style></keyword><keyword><style face="normal" font="default"> hydroxylation</style></keyword><keyword><style face="normal" font="default"> isoxaflutole</style></keyword><keyword><style face="normal" font="default"> mass</style></keyword><keyword><style face="normal" font="default"> METABOLISM</style></keyword><keyword><style face="normal" font="default"> metabolites</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> performance</style></keyword><keyword><style face="normal" font="default"> shade</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil nitrate</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> tolerance</style></keyword><keyword><style face="normal" font="default"> water</style></keyword></keywords><dates><year Day="0" Month="0" Year="2004">2004</year></dates><abstract><style face="normal" font="default">Multi-species tree-shrub-grass riparian buffer systems have been recognized as one of the most cost-effective bioremediation approaches to alleviate nonpoint source agricultural pollution in heavily fertilized systems. However, highly concentrated herbicides in surface and subsurface water and shade cast by trees along the stream bank usually compromise the effectiveness of these systems. Greenhouse trials and field lysimeter studies were conducted to evaluate the tolerance of orchard grass (Dactylis glomerata), smooth bromegrass (Bromus inermis), tall fescue (Festuca arundinacea), timothy (Phleum pratense), and switchgrass (Panicum virgatum) ground covers to atrazine and Balance(TM) (isoxaflutole) plus their capacity to sequester and degrade these herbicides and their metabolites. Their ability to remove soil nitrate was also quantified. Concentrations of atrazine, Balance T and their metabolites in the leachate, soil and plant samples were determined by solid phase extraction followed by high performance liquid or gas chromatographic analyses. Distribution of the herbicides and metabolites in the system was calculated using a mass balance approach. Herbicide bioremediation capacity of each lysimeter treatment was determined by the ratio of metabolites to parent herbicide plus metabolites. Bioremediation of nitrate was quantified by comparing nitrate reduction rates in grass treatments to the bare ground control. Based on this herbicide tolerance, bioremediation data and shade tolerance determined in a previous study, it was established that switch grass, tall fescue and smooth bromegrass are good candidates for incorporation into tree-shrub-grass riparian buffer systems designed for the bioremediation of atrazine, Balance T and nitrate</style></abstract><notes><style face="normal" font="default">JArticleDiscipline: AGRONOMY; FORESTRY</style></notes><urls><web-urls><url ppv-ref="no">ISI:000225324700010</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0003-128242.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>1</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lu,Y.C.</style></author><author><style face="normal" font="default"> Camp,C.R.</style></author><author><style face="normal" font="default"> Sadler,E.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Efficient allocations of irrigation water and nitrogen fertilizer in corn production</style></title><secondary-title><style face="normal" font="default">Journal of Sustainable Agriculture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Sustainable Agriculture</style></full-title></periodical><pages end="111" start="97">97-111</pages><volume><style face="normal" font="default">24</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">applications</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> fertilizer</style></keyword><keyword><style face="normal" font="default"> information</style></keyword><keyword><style face="normal" font="default"> irrigation</style></keyword><keyword><style face="normal" font="default"> irrigation water</style></keyword><keyword><style face="normal" font="default"> N-fertilizer</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword><keyword><style face="normal" font="default"> production functions</style></keyword><keyword><style face="normal" font="default"> profit-maximization</style></keyword><keyword><style face="normal" font="default"> site-specific irrigation</style></keyword><keyword><style face="normal" font="default"> South Carolina</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> water conservation</style></keyword><keyword><style face="normal" font="default"> yield-maximization</style></keyword></keywords><dates><year Day="0" Month="0" Year="2004">2004</year></dates><abstract><style face="normal" font="default">N-fertilizer and irrigation water are major inputs to corn production and efficient use of these inputs is essential for profit maximization and resource conservation. To use these inputs efficiently, knowledge about plant responses to N-fertilizer and irrigation water, or production functions, is essential. Corn production functions were estimated using the data from experimental plots in Florence, South Carolina, U.S.A., from 1999 through 2001. There were three irrigation treatments and four N-fertilizer regimes. Several forms of production functions were fitted to the data and the quadratic form of the production function was found to have the best fit for the data. The estimated production functions were then used to determine the optimal levels of water and N-fertilizer applications under both yield-maximizing and profit-maximizing strategies. Results indicate that the yield-maximizing strategy called for more water and N-fertilizer and yielded smaller net returns than the profit-maximizing strategy. In 1999, for example, under the current average prices old corn, water, and N-fertilizer, the yield-maximizing strategy required 667 ha-mm of water and 224 kg of N-fertilizer to produce 10.4 Mg/ha of corn and $5.42 of net returns; whereas the profit-maximizing strategy required only 556 ha-mm of water and 174 kg of N-fertilizer to produce 9.87 Mg of corn and $57.38 of net returns. The least-cost combinations of water and N-fertilizer application levels for a given output were also determined. The results provide useful information to farmers to make N-fertilizer and irrigation decisions for profit maximization and for resource conservation</style></abstract><notes><style face="normal" font="default">JArticleDiscipline: AGRICULTURE, MULTIDIDiscipline: IPLINARY</style></notes><urls><web-urls><url ppv-ref="no">ISI:000225238500007</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0001-sadler.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>12</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Motavalli,P.P.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Fang,M.</style></author><author><style face="normal" font="default"> Means,N.E.</style></author></authors></contributors><titles><title><style face="normal" font="default">Impact of genetically modified crops and their management on soil microbially mediated plant nutrient transformations</style></title><secondary-title><style face="normal" font="default">Journal of Environmental Quality</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Environmental Quality</style></full-title></periodical><pages end="824" start="816">816-824</pages><volume><style face="normal" font="default">33</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">applications</style></keyword><keyword><style face="normal" font="default"> area</style></keyword><keyword><style face="normal" font="default"> AVAILABLE PHOSPHORUS CORN</style></keyword><keyword><style face="normal" font="default"> BACILLUS-THURINGIENSIS</style></keyword><keyword><style face="normal" font="default"> BT CORN</style></keyword><keyword><style face="normal" font="default"> CLAY</style></keyword><keyword><style face="normal" font="default"> crops</style></keyword><keyword><style face="normal" font="default"> ECTOMYCORRHIZAL FUNGI</style></keyword><keyword><style face="normal" font="default"> EROSION</style></keyword><keyword><style face="normal" font="default"> evaluation</style></keyword><keyword><style face="normal" font="default"> fertilizer</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> glyphosate</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> HUMIC ACIDS</style></keyword><keyword><style face="normal" font="default"> INSECTICIDAL ACTIVITY</style></keyword><keyword><style face="normal" font="default"> land use</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> mineralization</style></keyword><keyword><style face="normal" font="default"> organic matter</style></keyword><keyword><style face="normal" font="default"> ORGANIC-MATTER</style></keyword><keyword><style face="normal" font="default"> pesticide application</style></keyword><keyword><style face="normal" font="default"> plant nutrition</style></keyword><keyword><style face="normal" font="default"> RATES</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil organic matter</style></keyword><keyword><style face="normal" font="default"> soil properties</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> THURINGIENSIS SUBSP KURSTAKI</style></keyword><keyword><style face="normal" font="default"> tillage</style></keyword><keyword><style face="normal" font="default"> tolerance</style></keyword><keyword><style face="normal" font="default"> TOXIN</style></keyword><keyword><style face="normal" font="default"> TRANSGENIC PLANTS</style></keyword><keyword><style face="normal" font="default"> variation</style></keyword></keywords><dates><year Day="0" Month="0" Year="2004">2004</year></dates><abstract><style face="normal" font="default">One of the potential environmental effects of the recent rapid increase in the global agricultural area cultivated with transgenic crops is a change in soil microbially mediated processes and functions. Among the many essential functions of soil biota are soil organic matter decomposition, nutrient mineralization and immobilization, oxidation-reduction reactions, biological N fixation, and solubilization. However, relatively little research has examined the direct and indirect effects of transgenic crops and their management on microbially mediated nutrient transformations in soils. The objectives of this paper are to review the available literature related to the environmental effects of transgenic crops and their management on soil microbially mediated nutrient transformations, and to consider soil properties and climatic factors that may affect the impact of transgenic crops on these processes. Targeted genetic traits for improved plant nutrition include greater plant tolerance to low Fe availability in alkaline soils, enhanced acquisition of soil inorganic and organic P, and increased assimilation of soil N. Among the potential direct effects of transgenic crops and their management are changes in soil microbial activity due to differences in the amount and composition of root exudates, changes in microbial functions resulting from gene transfer from the transgenic crop, and alteration in microbial populations because of the effects of management practices for transgenic crops, such as pesticide applications, tillage, and application of inorganic and organic fertilizer sources. Possible indirect effects of transgenic crops, including changes in the fate of transgenic crop residues and alterations in land use and rates of soil erosion, deserve further study. Despite widespread public concern, no conclusive evidence has yet been presented that currently released transgenic crops, including both herbicide and pest resistant crops, are causing significant direct effects on stimulating or suppressing soil nutrient transformations in field environments. Further consideration of the effects of a wide range of soil properties, including the amount of clay and its mineralogy, pH, soil structure, and soil organic matter, and variations in climatic conditions, under which transgenic crops may be grown, is needed in evaluating the impact of transgenic crops on soil nutrient transformations. Future environmental evaluation of the impact of the diverse transgenic crops under development could lead to an improved understanding of soil biological functions and processes</style></abstract><notes><style face="normal" font="default">JArticleMAY-JUNDiscipline: ENVIRONMENTAL Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:000221509200003</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0012-158141.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>17</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Officer,S.J.</style></author><author><style face="normal" font="default"> Kravchenko,A.</style></author><author><style face="normal" font="default"> Bollero,G.A.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Wiebold,W.J.</style></author><author><style face="normal" font="default"> Palm,H.L.</style></author><author><style face="normal" font="default"> Bullock,D.G.</style></author></authors></contributors><titles><title><style face="normal" font="default">Relationships between soil bulk electrical conductivity and the principal component analysis of topography and soil fertility values</style></title><secondary-title><style face="normal" font="default">Plant and Soil</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Plant and Soil</style></full-title></periodical><pages end="280" start="269">269-280</pages><volume><style face="normal" font="default">258</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">applications</style></keyword><keyword><style face="normal" font="default"> CAPACITY</style></keyword><keyword><style face="normal" font="default"> cation exchange capacity</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> electrical conductivity</style></keyword><keyword><style face="normal" font="default"> ELECTRICAL-CONDUCTIVITY</style></keyword><keyword><style face="normal" font="default"> errors</style></keyword><keyword><style face="normal" font="default"> estimation</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> fields</style></keyword><keyword><style face="normal" font="default"> Glycine max</style></keyword><keyword><style face="normal" font="default"> Illinois</style></keyword><keyword><style face="normal" font="default"> information</style></keyword><keyword><style face="normal" font="default"> kriging</style></keyword><keyword><style face="normal" font="default"> land use</style></keyword><keyword><style face="normal" font="default"> mapping</style></keyword><keyword><style face="normal" font="default"> maps</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> models</style></keyword><keyword><style face="normal" font="default"> organic matter</style></keyword><keyword><style face="normal" font="default"> ORGANIC-MATTER</style></keyword><keyword><style face="normal" font="default"> patterns</style></keyword><keyword><style face="normal" font="default"> precision agriculture</style></keyword><keyword><style face="normal" font="default"> principal component analysis</style></keyword><keyword><style face="normal" font="default"> principal components</style></keyword><keyword><style face="normal" font="default"> site specific management</style></keyword><keyword><style face="normal" font="default"> site-specific</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil bulk electrical conductivity</style></keyword><keyword><style face="normal" font="default"> soil electrical conductivity</style></keyword><keyword><style face="normal" font="default"> soil fertility</style></keyword><keyword><style face="normal" font="default"> soil pH</style></keyword><keyword><style face="normal" font="default"> SPATIAL VARIABILITY</style></keyword><keyword><style face="normal" font="default"> topography</style></keyword><keyword><style face="normal" font="default"> Zea mays</style></keyword><keyword><style face="normal" font="default"> ZEA-MAYS</style></keyword></keywords><dates><year Day="0" Month="0" Year="2004">2004</year></dates><abstract><style face="normal" font="default">Measures of soil electrical conductivity (EC) and elevation are relatively inexpensive to collect and result in dense data sets which allow for mapping with limited interpolation. Conversely, soil fertility information is expensive to collect so that relatively few samples are taken and mapping requires extensive interpolation with large estimation errors, resulting in limited usefulness for site-specific applications in precision agriculture. Principal component (PC) analysis and cokriging can be applied to create meaningful field scale summaries of groups of attributes and to decrease the estimation error of maps of the summarized attributes. Deep ( 0 - 90 cm) and shallow ( 0 - 30 cm) EC, elevation, and soil fertility attributes were measured in fields under corn (Zea mays L.) and soybean ( Glycine max L.) rotations, at two sites in Illinois (IL) and two sites in Missouri ( MO). Soil fertility and topography attributes were summarized by PC analysis. The first topography PC (TopoPC1) contrasted flow accumulation against elevation and curvature, to describe the main topographic pattern of the fields. The first soil fertility PC (SoilPC1) consistently grouped together cation exchange capacity (CEC), Ca, Mg, and organic matter ( OM). SoilPC1 was well correlated to soil EC for all sites and cokriging with EC had higher r(2) in the crossvariogram models compared to ordinary kriging. The second and third soil fertility PCs (SoilPC2 and SoilPC3) were concerned with soil pH and P, and reflected historic land use patterns. Maps of SoilPC2 and SoilPC3 had little relationship to soil EC or topography and so could not be improved by cokriging</style></abstract><notes><style face="normal" font="default">JArticleJANDiscipline: AGRICULTURE, SOIL Discipline: IENCE; AGRONOMY; PLANT Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:000189012200025</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0017-128245.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>13</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Poach,M.E.</style></author><author><style face="normal" font="default"> Hunt,P.G.</style></author><author><style face="normal" font="default"> Reddy,G.B.</style></author><author><style face="normal" font="default"> Stone,K.C.</style></author><author><style face="normal" font="default"> Matheny,T.A.</style></author><author><style face="normal" font="default"> Johnson,M.H.</style></author><author><style face="normal" font="default"> Sadler,E.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Ammonia volatilization from marsh-pond-marsh constructed wetlands treating swine wastewater</style></title><secondary-title><style face="normal" font="default">Journal of Environmental Quality</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Environmental Quality</style></full-title></periodical><pages end="851" start="844">844-851</pages><volume><style face="normal" font="default">33</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">design</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword><keyword><style face="normal" font="default"> RATES</style></keyword><keyword><style face="normal" font="default"> removal</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> swine</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> wastewater treatment</style></keyword><keyword><style face="normal" font="default"> wetlands</style></keyword></keywords><dates><year Day="0" Month="0" Year="2004">2004</year></dates><abstract><style face="normal" font="default">Ammonia (NH3) volatilization is an undesirable mechanism for the removal of nitrogen (N) from wastewater treatment wetlands. To minimize the potential for NH3 volatilization, it is important to determine how wetland design affects NH3 volatilization. The objective of this research was to determine how the presence of a pond section affects NH3 volatilization from constructed wetlands treating wastewater from a confined swine operation. Wastewater was added at different N loads to six constructed wetlands of the marsh-pond-marsh design that were located in Greensboro, North Carolina, USA. A large enclosure was used to measure NH3 volatilization from the marsh and pond sections of each wetland in July and August of 2001. Ammonia volatilized from marsh and pond sections at rates ranging from 5 to 102 mg NH3-N m(-2) h(-1). Pond sections exhibited a significantly greater increase in the rate of NH3 volatilization (p &lt; 0.0001) than did either marsh section as N load increased. At N loads greater than 15 kg ha(-1) d(-1), NH3 volatilization accounted for 23 to 36% of the N load. Furthermore, NH3 volatilization was the dominant (54-79%) N removal mechanism at N loads greater than 15 kg ha(-1) d(-1). Without the pond sections, NH3 volatilization would have been a minor contributor (less than 12%) to the N balance of these wetlands. To minimize NH3 volatilization, continuous marsh systems should be preferred over marsh-pond-marsh systems for the treatment of wastewater from confined animal operations</style></abstract><notes><style face="normal" font="default">JArticleMAY-JUNDiscipline: ENVIRONMENTAL Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:000221509200007</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0013-sadler.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>10</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Rachman,A.</style></author><author><style face="normal" font="default"> Anderson,S.H.</style></author><author><style face="normal" font="default"> Gantzer,C.J.</style></author><author><style face="normal" font="default"> Alberts,E.E.</style></author></authors></contributors><titles><title><style face="normal" font="default">Soil hydraulic properties influenced by stiff-stemmed grass hedge systems</style></title><secondary-title><style face="normal" font="default">Soil Science Society of America Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil Science Society of America Journal</style></full-title></periodical><pages end="1393" start="1386">1386-1393</pages><volume><style face="normal" font="default">68</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">area</style></keyword><keyword><style face="normal" font="default"> bulk density</style></keyword><keyword><style face="normal" font="default"> CLAY</style></keyword><keyword><style face="normal" font="default"> compaction</style></keyword><keyword><style face="normal" font="default"> depth</style></keyword><keyword><style face="normal" font="default"> EROSION</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> HEDGES</style></keyword><keyword><style face="normal" font="default"> LOAM</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> PHYSICAL-PROPERTIES</style></keyword><keyword><style face="normal" font="default"> position</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> runoff</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil water</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> tillage</style></keyword><keyword><style face="normal" font="default"> transport</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> WATER RETENTION</style></keyword></keywords><dates><year Day="0" Month="0" Year="2004">2004</year></dates><abstract><style face="normal" font="default">The effectiveness of stiff-stemmed grass hedge systems in controlling runoff and soil erosion is influenced by the water transport properties of the soil under grass hedge management. This study evaluated soil hydraulic properties within a grass hedge system 10 yr after establishment. The study was conducted at the USDA-ARS research station near Treynor, IA in a field managed with switchgrass (Panicum virgatum) hedges. The soil was classified as Monona silt loam (fine-silty, mixed, superactive, mesic Typic Hapludolls). Three positions were sampled: within the grass hedges, within the deposition zone 0.5 m upslope from the grass hedges, and within the row crop area 7 m upslope from the hedges. Intact soil samples (76 by 76 mm) were taken from the three positions at four depths (100-mm increments) to determine saturated soil hydraulic conductivity (K-sat), bulk density (rho(b)) and soil water retention. The grass hedge position had significantly greater (P &lt; 0.05) macroporosity than the row crop and deposition positions in the first two depths and greater than the deposition position in the last two depths. The K-sat within the grass hedge (668 mm h(-1)) was six times greater than in the row crop position (115 mm h(-1)) and 18 times greater than in the deposition position (37 turn h(-1)) for the surface 10 cm. Bulk density and macroporosity were found to provide the best two-parameter regression model for predicting the log-transformed K-sat (R-2 = 0.68). These results indicate that grass hedges significantly affected soil hydraulic properties for this loess soil</style></abstract><notes><style face="normal" font="default">JArticleJUL-AUGDiscipline: AGRICULTURE, SOIL Discipline: IENCE</style></notes><urls><web-urls><url ppv-ref="no">ISI:000222612400031</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0010-154490.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>297</rec-number><ref-type name="Book Chapter">3</ref-type><contributors><authors><author><style face="normal" font="default">Sudduth,K.A.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author></authors><secondary-authors><author><style face="normal" font="default">Stamatiadis,S.</style></author><author><style face="normal" font="default"> Lynch,J.M.</style></author><author><style face="normal" font="default"> Shepers,J.S.</style></author></secondary-authors></contributors><titles><title><style face="normal" font="default">Mapping Soil Electrical Conductivity</style></title><alt-title><style face="normal" font="default">Remote Sensing for Agriculture and the Environment</style></alt-title></titles><periodical/><pages end="201" start="188">188-201</pages><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">ELECTRICAL-CONDUCTIVITY</style></keyword><keyword><style face="normal" font="default"> electrical conductivity</style></keyword><keyword><style face="normal" font="default"> mapping</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil electrical conductivity</style></keyword><keyword><style face="normal" font="default"> remote sensing</style></keyword><keyword><style face="normal" font="default"> sensing</style></keyword><keyword><style face="normal" font="default"> environment</style></keyword></keywords><dates><year Day="0" Month="0" Year="2004">2004</year></dates><pub-location><style face="normal" font="default">Larissa, Greece</style></pub-location><publisher><style face="normal" font="default">Peripheral Editions</style></publisher><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0297-sudduth.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>4</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Sudduth,K.A.</style></author><author><style face="normal" font="default"> Hummel,J.W.</style></author><author><style face="normal" font="default"> Drummond,S.T.</style></author></authors></contributors><titles><title><style face="normal" font="default">Comparison of the veris profiler 3000 to an ASAE-standard penetrometer</style></title><secondary-title><style face="normal" font="default">Applied Engineering in Agriculture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Applied Engineering in Agriculture</style></full-title></periodical><pages end="541" start="535">535-541</pages><volume><style face="normal" font="default">20</style></volume><number><style face="normal" font="default">5</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">agricultural engineering</style></keyword><keyword><style face="normal" font="default"> compaction</style></keyword><keyword><style face="normal" font="default"> cone index</style></keyword><keyword><style face="normal" font="default"> CONE PENETROMETER</style></keyword><keyword><style face="normal" font="default"> electrical conductivity</style></keyword><keyword><style face="normal" font="default"> ELECTRICAL-CONDUCTIVITY</style></keyword><keyword><style face="normal" font="default"> equations</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> measurement</style></keyword><keyword><style face="normal" font="default"> penetrometers</style></keyword><keyword><style face="normal" font="default"> precision agriculture</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> size</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil compaction</style></keyword><keyword><style face="normal" font="default"> soil electrical conductivity</style></keyword><keyword><style face="normal" font="default"> SOIL ELECTRICAL-CONDUCTIVITY</style></keyword></keywords><dates><year Day="0" Month="0" Year="2004">2004</year></dates><abstract><style face="normal" font="default">Cone penetrometers, as standardized by ASAE, have been used for many years as the primary instrument for investigating and quantifying soil compaction. Recently, non-standard penetrometers have become commercially available. These instruments depart from the standard so they can simultaneously sense additional soil parameters [e.g., soil electrical conductivity (EC)] in addition to cone index (CI). In this research we compared CI data collected with the Veris Profiler 3000 EC-sensing penetrometer to CI data collected with ASAE-standard large cone and small cone penetrometers. The Profiler operated at a faster insertion speed and exhibited a non-standard cone geometry. Cone geometry had a significant effect when comparing this penetrometer to standard large and small cones. There was also a significant effect of cone size between the two standard cones. It was possible to develop CI-dependent equations relating data collected with one tip to data from another tip, but a large amount of scatter was present in the relationship. No significant effect of insertion speed was detected among the ASAE-standard insertion speed of 30 mm/s (1.2 in./s) and two higher speeds, 40 and 50 mm/s (1.6 and 2.0 in./s). The amount of scatter present in replicate CI data was inversely related to cone diameter indicating that fewer measurements would be required to obtain a given level of precision with a larger cone</style></abstract><notes><style face="normal" font="default">JArticleSEPDiscipline: AGRICULTURAL ENGINEERING</style></notes><urls><web-urls><url ppv-ref="no">ISI:000224685000001</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0004-143496.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>14</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Barnes,E.M.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Hummel,J.W.</style></author><author><style face="normal" font="default"> Lesch,S.M.</style></author><author><style face="normal" font="default"> Corwin,D.L.</style></author><author><style face="normal" font="default"> Yang,C.H.</style></author><author><style face="normal" font="default"> Daughtry,C.S.T.</style></author><author><style face="normal" font="default"> Bausch,W.C.</style></author></authors></contributors><titles><title><style face="normal" font="default">Remote- and ground-based sensor techniques to map soil properties</style></title><secondary-title><style face="normal" font="default">Photogrammetric Engineering and Remote Sensing</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Photogrammetric Engineering and Remote Sensing</style></full-title></periodical><pages end="630" start="619">619-630</pages><volume><style face="normal" font="default">69</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">canopy</style></keyword><keyword><style face="normal" font="default"> compaction</style></keyword><keyword><style face="normal" font="default"> CONDUCTIVITY-DEPTH RELATIONS</style></keyword><keyword><style face="normal" font="default"> CONE PENETROMETER</style></keyword><keyword><style face="normal" font="default"> crop production</style></keyword><keyword><style face="normal" font="default"> CROP RESIDUE COVER</style></keyword><keyword><style face="normal" font="default"> electrical conductivity</style></keyword><keyword><style face="normal" font="default"> ELECTRICAL-CONDUCTIVITY</style></keyword><keyword><style face="normal" font="default"> ELECTROMAGNETIC INDUCTION TECHNIQUES</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> information</style></keyword><keyword><style face="normal" font="default"> INFRARED REFLECTANCE</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> mapping</style></keyword><keyword><style face="normal" font="default"> maps</style></keyword><keyword><style face="normal" font="default"> measurement</style></keyword><keyword><style face="normal" font="default"> MULTIPLE LINEAR-REGRESSION</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword><keyword><style face="normal" font="default"> organic matter</style></keyword><keyword><style face="normal" font="default"> ORGANIC-MATTER</style></keyword><keyword><style face="normal" font="default"> position</style></keyword><keyword><style face="normal" font="default"> remote sensing</style></keyword><keyword><style face="normal" font="default"> SALINITY</style></keyword><keyword><style face="normal" font="default"> SALT-AFFECTED SOILS</style></keyword><keyword><style face="normal" font="default"> sensing</style></keyword><keyword><style face="normal" font="default"> sensor</style></keyword><keyword><style face="normal" font="default"> sensors</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil organic matter</style></keyword><keyword><style face="normal" font="default"> soil properties</style></keyword><keyword><style face="normal" font="default"> soil texture</style></keyword><keyword><style face="normal" font="default"> SPATIAL PREDICTION</style></keyword><keyword><style face="normal" font="default"> SPATIAL VARIABILITY</style></keyword><keyword><style face="normal" font="default"> spectral</style></keyword><keyword><style face="normal" font="default"> technology</style></keyword><keyword><style face="normal" font="default"> tillage</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> yield monitor</style></keyword></keywords><dates><year Day="0" Month="0" Year="2003">2003</year></dates><abstract><style face="normal" font="default">Farm managers are becoming increasingly aware of the spa-tial variability in crop production with the growing availability of yield monitors. Often this variability can be related to differences in soil properties (e.g., texture, organic matter, salinity levels, and nutrient status) within the field. To develop management approaches to address this variability, high spatial resolution soil property maps are often needed. Some soil properties have been related directly to a soil spectral response, or inferred based on remotely sensed measurements of crop canopies, including soil texture, nitrogen level, organic matter content, and salinity status. While many studies have obtained promising results, several interfering factors can limit approaches solely based on spectral response, including tillage conditions and crop residue. A number of different ground-based sensors have been used to rapidly assess soil properties "on the go" (e.g., sensor mounted on a tractor and data mapped with coincident position information) and the data from these sensors compliment image-based data. On-the-go sensors have been developed to rapidly map soil organic matter content, electrical conductivity, nitrate content, and compaction. Model and statistical methods show promise to integrate these ground-and image-based data sources to maximize the information from each source for soil property mapping</style></abstract><notes><style face="normal" font="default">JReviewJUNDiscipline: GEOGRAPHY, PHYSICAL; GEODiscipline: IENCES, MULTIDIDiscipline: IPLINARY; IMAGING Discipline: IENCE &amp; PHOTOGRAPHIC TECHNOLOGY; REMOTE SENSING</style></notes><urls><web-urls><url ppv-ref="no">ISI:000221193400004</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0014-124518.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>19</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author><author><style face="normal" font="default"> Johnson,W.G.</style></author></authors></contributors><titles><title><style face="normal" font="default">Interference effects of weed-infested bands in or between crop rows on field corn (Zea mays) yield</style></title><secondary-title><style face="normal" font="default">Weed Technology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Technology</style></full-title></periodical><pages end="763" start="755">755-763</pages><volume><style face="normal" font="default">17</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">AMARANTHUS-RETROFLEXUS</style></keyword><keyword><style face="normal" font="default"> APPLIED HERBICIDE</style></keyword><keyword><style face="normal" font="default"> COMMON COCKLEBUR</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> CRITICAL PERIOD</style></keyword><keyword><style face="normal" font="default"> DENSITY</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> GROUND COVER</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> LIVING MULCH</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> RELATIVE LEAF COVER</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> SOYBEAN GLYCINE-MAX</style></keyword><keyword><style face="normal" font="default"> summer</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> yields</style></keyword><keyword><style face="normal" font="default"> Zea mays</style></keyword><keyword><style face="normal" font="default"> ZEA-MAYS</style></keyword></keywords><dates><year Day="0" Month="0" Year="2003">2003</year></dates><abstract><style face="normal" font="default">The effect of season-long interference by bands of weeds growing only between rows (BR) on field corn yields has not been reported before or compared with weedy and weed-free (i.e., weeded) plots or bands of weeds growing only in row (IR). The null hypothesis of this research was that field corn yields would be ranked as weed-free > BR weedy only > IR weedy only > weedy (IR + BR weedy) in response to season-long weed interference by these four treatments. Weeds growing as bands closest to field corn were expected to reduce field corn yields more than those growing as bands further away between field corn rows. Field corn yield response to these four weed interference treatments was studied in Missouri for 4 yr. In late summer, most weed ground cover consisted of giant foxtail, the chief weed present, and common waterhemp, a lesser weed. Observed field corn yields averaged for 4 yr were ranked as weed-free > IR weedy only > BR weedy only > weedy. Field corn yields of the IR weedy only, BR weedy only, and weedy treatments averaged 76, 63, and 41%, respectively, of the weed-free treatment (=7,820 kg/ha). In two of the 4 yr, field corn yield of the IR weedy treatment exceeded that of the BR weedy treatment, whereas these treatments could not be statistically distinguished from one another in the other 2 yr. These research results refute the null hypothesis and demonstrate that it may be more critical to control BR than IR weeds, although controlling both BR and IR weeds maximized field corn yields</style></abstract><notes><style face="normal" font="default">JArticleOCT-DECDiscipline: AGRONOMY; PLANT Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:000187430000016</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0019-138292.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>31</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Drummond,S.T.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Joshi,A.</style></author><author><style face="normal" font="default"> Birrell,S.J.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author></authors></contributors><titles><title><style face="normal" font="default">Statistical and neural methods for site-specific yield prediction</style></title><secondary-title><style face="normal" font="default">Transactions of the Asae</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the Asae</style></full-title></periodical><pages end="14" start="5">5-14</pages><volume><style face="normal" font="default">46</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">agricultural engineering</style></keyword><keyword><style face="normal" font="default"> characteristics</style></keyword><keyword><style face="normal" font="default"> claypan soils</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> crop yield</style></keyword><keyword><style face="normal" font="default"> errors</style></keyword><keyword><style face="normal" font="default"> estimation</style></keyword><keyword><style face="normal" font="default"> evaluation</style></keyword><keyword><style face="normal" font="default"> GRAIN-YIELD</style></keyword><keyword><style face="normal" font="default"> NETWORK</style></keyword><keyword><style face="normal" font="default"> neural networks</style></keyword><keyword><style face="normal" font="default"> precision agriculture</style></keyword><keyword><style face="normal" font="default"> prediction</style></keyword><keyword><style face="normal" font="default"> regression analysis</style></keyword><keyword><style face="normal" font="default"> site-specific</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SOIL ELECTRICAL-CONDUCTIVITY</style></keyword><keyword><style face="normal" font="default"> soil properties</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> yields</style></keyword></keywords><dates><year Day="0" Month="0" Year="2003">2003</year></dates><abstract><style face="normal" font="default">Understanding the relationships between yield and soil properties and topographic characteristics is of critical importance in precision agriculture. A necessary first step is to identify techniques to reliably quantify the relationships between soil and topographic characteristics and crop yield. Stepwise-multiple linear. regression (SMLR), projection pursuit regression (PPR), and several types of supervised feed-forward neural networks were-investigated in an attempt to identify methods able to relate soil properties and grain yields on a point-by-point basis within ten individual site years. To avoid. overfitting,, evaluations were based on predictive ability using a 5: fold cross-validation technique. The neural techniques consistently outperformed both SMLR. and PPR and provided minimal prediction errors in every site-year. However, in site-years with relatively fewer observations and in site: years where a single, overriding factor was not apparent, the improvements achieved by neural networks over both SMLR and PPR were small. A second phase of the experiment involved estimation of crop yield across multiple site-years by including climatological data. The ten site years of data were appended with climatological variables, and prediction errors were computed. The results showed that significant overfitting had occurred and indicated that a much larger number of climatologically unique site years would be required in this type of analysis</style></abstract><notes><style face="normal" font="default">JArticleJAN-FEBDiscipline: AGRICULTURAL ENGINEERING</style></notes><urls><web-urls><url ppv-ref="no">ISI:000181583000001</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0031-131434.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>27</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kitchen,N.R.</style></author><author><style face="normal" font="default"> Drummond,S.T.</style></author><author><style face="normal" font="default"> Lund,E.D.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Buchleiter,G.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Soil electrical conductivity and topography related to yield for three contrasting soil-crop systems</style></title><secondary-title><style face="normal" font="default">Agronomy Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Agronomy Journal</style></full-title></periodical><pages end="495" start="483">483-495</pages><volume><style face="normal" font="default">95</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">BOUNDARY-LINE</style></keyword><keyword><style face="normal" font="default"> COMBINE</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> correlation</style></keyword><keyword><style face="normal" font="default"> crops</style></keyword><keyword><style face="normal" font="default"> electrical conductivity</style></keyword><keyword><style face="normal" font="default"> ELECTRICAL-CONDUCTIVITY</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> fields</style></keyword><keyword><style face="normal" font="default"> global positioning system</style></keyword><keyword><style face="normal" font="default"> GRAIN-YIELD</style></keyword><keyword><style face="normal" font="default"> information</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> NETWORK</style></keyword><keyword><style face="normal" font="default"> neural networks</style></keyword><keyword><style face="normal" font="default"> planning</style></keyword><keyword><style face="normal" font="default"> precision agriculture</style></keyword><keyword><style face="normal" font="default"> sensor</style></keyword><keyword><style face="normal" font="default"> site specific management</style></keyword><keyword><style face="normal" font="default"> site-specific</style></keyword><keyword><style face="normal" font="default"> site-specific management</style></keyword><keyword><style face="normal" font="default"> slope</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil electrical conductivity</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> topography</style></keyword><keyword><style face="normal" font="default"> Triticum aestivum</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword><keyword><style face="normal" font="default"> variation</style></keyword><keyword><style face="normal" font="default"> winter wheat</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> Zea mays</style></keyword><keyword><style face="normal" font="default"> ZEA-MAYS</style></keyword></keywords><dates><year Day="0" Month="0" Year="2003">2003</year></dates><abstract><style face="normal" font="default">Many producers who map yield want to know how soil and landscape information can be used to help account for yield variability and provide insight into improving production. This study was conducted to investigate the relationship of profile apparent soil electrical conductivity (ECa) and topographic measures to grain yield for three contrasting soil-crop systems. Yield data were collected with combine yield-monitoring systems on three fields [Colorado (Ustic Haplargids), Kansas (Cumuic Haplustoll), and Missouri (Aeric Vertic Epiaqualfs)] during 1997-1999. Crops included four site-years of corn (Zea mays L.), three site-years of soybean (Glycine mar L.), and one site-year each of grain sorghum [Sorghum bicolor (L.) Moench] and winter wheat (Triticum aestivum L.). Apparent soil electrical conductivity was obtained using a Veris model 3100 sensor cart system. Elevation, obtained by either conventional surveying techniques or real-time kinematic global positioning system, was used to determine slope, curvature, and aspect. Four analysis procedures were employed to investigate the relationship of these variables to yield: correlation, forward stepwise regression, nonlinear neural networks (NNs), and boundary-line analysis. Correlation results, while often statistically significant, were generally not very useful in explaining yield. Using either regression or NN analysis, ECa alone explained yield variability (averaged over sites and years R-2 = 0.21) better than topographic variables (averaged over sites and years R-2 = 0.17). In six of the nine site-years, the model R-2 was better with ECa than with topography. Combining ECa and topography measures together usually improved model R1 values (averaged over sites and years R-2 = 0.32). Boundary lines generally showed yield decreasing with increasing ECa for Kansas and Missouri fields. Results of this study can benefit farmers and consultants by helping them understand the degree to which sensor-based soil and topography information can be related to yield variation for planning site-specific management</style></abstract><notes><style face="normal" font="default">JArticleMAY-JUNDiscipline: AGRONOMY</style></notes><urls><web-urls><url ppv-ref="no">ISI:000183256300003</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0027-123811.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>24</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kremer,R.J.</style></author><author><style face="normal" font="default"> Li,J.M.</style></author></authors></contributors><titles><title><style face="normal" font="default">Developing weed-suppressive soils through improved soil quality management</style></title><secondary-title><style face="normal" font="default">Soil &amp; Tillage Research</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil &amp; Tillage Research</style></full-title></periodical><pages end="202" start="193">193-202</pages><volume><style face="normal" font="default">72</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">BIOCONTROL AGENTS</style></keyword><keyword><style face="normal" font="default"> BIOLOGY</style></keyword><keyword><style face="normal" font="default"> characteristics</style></keyword><keyword><style face="normal" font="default"> conservation biological control</style></keyword><keyword><style face="normal" font="default"> crop management</style></keyword><keyword><style face="normal" font="default"> cropping systems</style></keyword><keyword><style face="normal" font="default"> ENZYME-ACTIVITIES</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> management systems</style></keyword><keyword><style face="normal" font="default"> MICROBIAL-POPULATIONS</style></keyword><keyword><style face="normal" font="default"> organic matter</style></keyword><keyword><style face="normal" font="default"> ORGANIC-MATTER</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> RESIDUES</style></keyword><keyword><style face="normal" font="default"> RHIZOBACTERIA</style></keyword><keyword><style face="normal" font="default"> SEEDLINGS</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil enzyme activity</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> sustainability</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> tillage</style></keyword><keyword><style face="normal" font="default"> TILLAGE SYSTEMS</style></keyword><keyword><style face="normal" font="default"> water-stable aggregates</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> weed management</style></keyword><keyword><style face="normal" font="default"> weed-suppressive bacteria</style></keyword></keywords><dates><year Day="0" Month="0" Year="2003">2003</year></dates><abstract><style face="normal" font="default">Manipulating soil microbial communities using soil and crop management practices is a basic strategy in developing sustainable agricultural systems. Sustainable farming is based, in part, on the efficient management of soil microorganisms to improve soil quality. However, the identification of biological indicators of soil quality that can be used to predict weed suppression in soils has received little attention. We investigated differences in soil microbial activity among various crop and soil management systems to assess: (i) the microbiological characteristics of these soils; (ii) determine whether any relationships existed that might be used in the development of weed suppression. Soil enzyme activity, water-stable aggregates, and the proportions of weed-suppressive bacteria were compared among seven cropping systems and one native-prairie ecosystem in mid-Missouri, USA. Assays of soil enzymes (fluorescein diacetate hydrolase, dehydrogenase, phosphatase) revealed that organic and integrated cropping systems, and the native-prairie ecosystem had the highest levels of soil activity. Weed rhizospheres from these same ecosystems also had greater proportions of bacterial isolates characterized as "growth suppressive" to green foxtail (Setaria viridis [L.] Beauv.) and field bindweed (Convolvulus arvensis L.): 15 and 10%, respectively. The proportion of water-stable soil aggregates was the greatest in soils with the highest organic matter and was found to be related to higher enzyme and weed-suppressive activity. Selected biological indicators of soil quality were associated with potential weed-suppressive activity in soil when that soil was managed for high organic matter content under reduced tillage systems. This research study provides further evidence that soil quality and sustainable agricultural practices may be linked to integrated weed management systems for the biological suppression of weeds. Published by Elsevier Science B.V</style></abstract><notes><style face="normal" font="default">JArticleAUGDiscipline: AGRICULTURE, SOIL Discipline: IENCE</style></notes><urls><web-urls><url ppv-ref="no">ISI:000184217600008</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0024-133235.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>21</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lerch,R.N.</style></author><author><style face="normal" font="default"> Blanchard,P.E.</style></author></authors></contributors><titles><title><style face="normal" font="default">Watershed vulnerability to herbicide transport in northern Missouri and southern Iowa streams</style></title><secondary-title><style face="normal" font="default">Environmental Science &amp; Technology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Environmental Science &amp; Technology</style></full-title></periodical><pages end="5527" start="5518">5518-5527</pages><volume><style face="normal" font="default">37</style></volume><number><style face="normal" font="default">24</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">alachlor</style></keyword><keyword><style face="normal" font="default"> area</style></keyword><keyword><style face="normal" font="default"> atrazine</style></keyword><keyword><style face="normal" font="default"> ATRAZINE DEGRADATION-PRODUCTS</style></keyword><keyword><style face="normal" font="default"> CHLOROACETANILIDE HERBICIDES</style></keyword><keyword><style face="normal" font="default"> contamination</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> cyanazine</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> fields</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> HYDROXYATRAZINE</style></keyword><keyword><style face="normal" font="default"> Iowa</style></keyword><keyword><style face="normal" font="default"> losses</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> metabolites</style></keyword><keyword><style face="normal" font="default"> metolachlor</style></keyword><keyword><style face="normal" font="default"> MIDWESTERN UNITED-STATES</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> monitoring</style></keyword><keyword><style face="normal" font="default"> RATES</style></keyword><keyword><style face="normal" font="default"> REGRESSION-MODELS</style></keyword><keyword><style face="normal" font="default"> RESERVOIRS</style></keyword><keyword><style face="normal" font="default"> RIVERS</style></keyword><keyword><style face="normal" font="default"> runoff</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil properties</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> streams</style></keyword><keyword><style face="normal" font="default"> SURFACE WATERS</style></keyword><keyword><style face="normal" font="default"> transport</style></keyword><keyword><style face="normal" font="default"> United States</style></keyword><keyword><style face="normal" font="default"> watershed</style></keyword><keyword><style face="normal" font="default"> watersheds</style></keyword></keywords><dates><year Day="0" Month="0" Year="2003">2003</year></dates><abstract><style face="normal" font="default">Herbicide contamination of streams has been well documented, but little is currently known about the specific factors affecting watershed vulnerability to herbicide transport. The primary objectives of this study were (1) to document herbicide occurrence and transport from watersheds in the northern Missouri/southern Iowa region; (2) to quantify watershed vulnerability to herbicide transport and relate vulnerability to soil properties; and (3) to compute the contribution of this region to the herbicide load of the Missouri and Mississippi Rivers. Grab samples were collected under baseflow and runoff Conditions at 21 hydrologic monitoring stations between April 15 and July 15 from 1996 to 1999. Samples were analyzed for commonly used soil-applied herbicides (atrazine, cyanazine, acetochlor, alachlor, metolachlor, and metribuzin) and four triazine metabolites (deisopropylatrazine, deethylatrazine, hydroxyatrazine, and cyanazine amide). Estimates of herbicide load and relative losses were computed for each watershed. Median parent herbicide losses, as a percentage of applied, ranged from 0.33 to 3.9%; loss rates that were considerably higher than other areas of the United States. Watershed vulnerability to herbicide transport, measured as herbicide load per treated area, showed that the runoff potential of soils was a critical factor affecting herbicide transport. Herbicide transport from these watersheds contributed a disproportionately high amount of the herbicide load to both the Missouri and Mississippi Rivers. Based on these results, this region of the Corn Belt is highly vulnerable to transport of herbicides from fields to streams, and it should be targeted for implementation of management practices designed to reduce herbicide losses in surface runoff</style></abstract><notes><style face="normal" font="default">JArticleDEC 15Discipline: ENGINEERING, ENVIRONMENTAL; ENVIRONMENTAL Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:000187248000007</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0021-148060.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>23</rec-number><ref-type name="Book Chapter">3</ref-type><contributors><authors><author><style face="normal" font="default">Lerch,R.N.</style></author><author><style face="normal" font="default"> Ferrer,I.</style></author><author><style face="normal" font="default"> Thurman,E.M.</style></author><author><style face="normal" font="default"> Zablotowicz,R.M.</style></author></authors></contributors><titles><title><style face="normal" font="default">Identification of trifluralin metabolites in soil using ion-trap LC/MS/MS</style></title><secondary-title><style face="normal" font="default">Liquid Chromatography/Mass Spectrometry, Ms/Ms and Time-Of-Flight Ms</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Liquid Chromatography/Mass Spectrometry, Ms/Ms and Time-Of-Flight Ms</style></full-title></periodical><pages end="310" start="291">291-310</pages><volume><style face="normal" font="default">850</style></volume><number><style face="normal" font="default">17</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">atrazine</style></keyword><keyword><style face="normal" font="default"> degradation</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> mass</style></keyword><keyword><style face="normal" font="default"> metabolites</style></keyword><keyword><style face="normal" font="default"> MIDWESTERN UNITED-STATES</style></keyword><keyword><style face="normal" font="default"> patterns</style></keyword><keyword><style face="normal" font="default"> pesticides</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword></keywords><dates><year Day="0" Month="0" Year="2003">2003</year></dates><abstract><style face="normal" font="default">Trifluralin degradation in soils is complex, potentially resulting in the formation of 28 metabolites. The objective of this research was to develop an approach for the identification of trifluralin metabolites in soils using ion-trap liquid chromatography/mass spectrometry (LC/MS/MS). Authentic standards of the parent and six metabolites were used to establish appropriate instrument conditions and precursor ion (PI) fragmentation patterns to confirm their identity, as well as to facilitate confirmation of metabolites for which authentic standards were not available. Two soils from herbicide spill sites known to be contaminated with trifluralin were selected for study because of their high potential for metabolite detection. Soils were extracted with 70% aqueous acetonitrile, filtered, and directly injected into the ion-trap LC/MS/MS. Trifluralin metabolites were then identified as follows: 1) screen for PI masses; 2) compare retention time of the PI peak to standards; and 3) obtain PI spectra and compare fragmentation with standards. The validity of this approach was confirmed for the identification of metabolite, TR-20. Preliminary results identified the presence of up to eight metabolites in the soils, and the array of metabolites present were indicative of aerobic trifluralin degradation. (C) 2003 American Chemical Society</style></abstract><notes><style face="normal" font="default">SReview</style></notes><urls><web-urls><url ppv-ref="no">ISI:000185089900017</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0023-lerch.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>22</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lin,C.H.</style></author><author><style face="normal" font="default"> Lerch,R.N.</style></author><author><style face="normal" font="default"> Garrett,H.E.</style></author><author><style face="normal" font="default"> Johnson,W.G.</style></author><author><style face="normal" font="default"> Jordan,D.</style></author><author><style face="normal" font="default"> George,M.F.</style></author></authors></contributors><titles><title><style face="normal" font="default">The effect of five forage species on transport and transformation of atrazine and isoxaflutole (balance) in lysimeter leachate</style></title><secondary-title><style face="normal" font="default">Journal of Environmental Quality</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Environmental Quality</style></full-title></periodical><pages end="2000" start="1992">1992-2000</pages><volume><style face="normal" font="default">32</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">ADSORPTION</style></keyword><keyword><style face="normal" font="default"> atrazine</style></keyword><keyword><style face="normal" font="default"> biomass</style></keyword><keyword><style face="normal" font="default"> carbon</style></keyword><keyword><style face="normal" font="default"> dealkylation</style></keyword><keyword><style face="normal" font="default"> degradation</style></keyword><keyword><style face="normal" font="default"> DEGRADATION-PRODUCTS</style></keyword><keyword><style face="normal" font="default"> diketonitrile</style></keyword><keyword><style face="normal" font="default"> evapotranspiration</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> forage</style></keyword><keyword><style face="normal" font="default"> France</style></keyword><keyword><style face="normal" font="default"> GROUND COVER</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> HERBICIDE ISOXAFLUTOLE</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> HYDROLYSIS</style></keyword><keyword><style face="normal" font="default"> HYDROXYATRAZINE</style></keyword><keyword><style face="normal" font="default"> isoxaflutole</style></keyword><keyword><style face="normal" font="default"> MASS-SPECTROMETRY</style></keyword><keyword><style face="normal" font="default"> metabolites</style></keyword><keyword><style face="normal" font="default"> MIDWESTERN UNITED-STATES</style></keyword><keyword><style face="normal" font="default"> PERFORMANCE LIQUID-CHROMATOGRAPHY</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> SOLID-PHASE EXTRACTION</style></keyword><keyword><style face="normal" font="default"> species</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> timing</style></keyword><keyword><style face="normal" font="default"> transport</style></keyword></keywords><dates><year Day="0" Month="0" Year="2003">2003</year></dates><abstract><style face="normal" font="default">A field lysimeter study with bare ground and five different ground covers was established to evaluate the effect of forage grasses on the fate and transport of two herbicides in leachate. The herbicides were atrazine (ATR; 2-chloro-4-ethylamino-6-isopropylamino-1,3,5-triazine) and isoxaflutole [IXF-, 5-cyclopropyl-4-(2-methylsulfonyl-4-trifluormethyl-benzoyl)isoxazole], which has the commercial name Balance (Aventis Crop Science, Strasbourg, France). The ground covers included orchardgrass (Dactylis glomerata L.), smooth bromegrass (Bromus inermis Leyss.), tall fescue (Festuca arundinacea Schreb.), timothy (Phleum pratense L.), and switchgrass (Panicum virgatum L.). The results suggested that the total IXF (parent + metabolites) showed higher mobility than ATR and its metabolites. Differences in the timing of transport reflected the rapid degradation of IXF to the more soluble, stable, and biologically active diketonitrile (DKN) metabolite in the system. Although grass treatments did not promote the hydrolysis of DKN, they significantly reduced its transport in the leachate through enhanced evapotranspiration. Grass treatments significantly enhanced ATR degradation in the leachates and soils, especially through N dealkylation, but they did not reduce total ATR transported in the leachate. Leachate from the orchardgrass lysimeters contained the highest proportion of ATR metabolites (64.2%). Timothy and smooth bromegrass treatments also displayed a significant increase in ATR metabolites in leachate. Grass-treated lysimeters showed higher microbial biomass carbon than bare ground. For ATR treatments, the proportion of metabolites in the leachate strongly correlated with the elevated soil microbial biomass carbon in forage treatments. In contrast, DKN degradation was poorly correlated with soil microbial biomass carbon, suggesting that DKN degradation is an abiotic process</style></abstract><notes><style face="normal" font="default">JArticleNOV-DECDiscipline: ENVIRONMENTAL Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:000186574700005</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0022-142056.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>20</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lin,C.H.</style></author><author><style face="normal" font="default"> Lerch,R.N.</style></author><author><style face="normal" font="default"> Garrett,H.E.</style></author><author><style face="normal" font="default"> George,M.F.</style></author></authors></contributors><titles><title><style face="normal" font="default">Degradation of isoxaflutole (Balance) herbicide by hypochlorite in tap water</style></title><secondary-title><style face="normal" font="default">Journal of Agricultural and Food Chemistry</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Agricultural and Food Chemistry</style></full-title></periodical><pages end="8014" start="8011">8011-8014</pages><volume><style face="normal" font="default">51</style></volume><number><style face="normal" font="default">27</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">benzoic acid</style></keyword><keyword><style face="normal" font="default"> benzoic acid metabolite</style></keyword><keyword><style face="normal" font="default"> CAPACITY</style></keyword><keyword><style face="normal" font="default"> chlorination</style></keyword><keyword><style face="normal" font="default"> chromatography</style></keyword><keyword><style face="normal" font="default"> degradation</style></keyword><keyword><style face="normal" font="default"> diketonitrile</style></keyword><keyword><style face="normal" font="default"> disinfection</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> HPLC-MS/MS</style></keyword><keyword><style face="normal" font="default"> HPLC-UV</style></keyword><keyword><style face="normal" font="default"> hypochlorite</style></keyword><keyword><style face="normal" font="default"> isoxaflutole</style></keyword><keyword><style face="normal" font="default"> kinetics</style></keyword><keyword><style face="normal" font="default"> losses</style></keyword><keyword><style face="normal" font="default"> mass</style></keyword><keyword><style face="normal" font="default"> mass spectrometry</style></keyword><keyword><style face="normal" font="default"> metabolites</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> storage</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> tap water</style></keyword><keyword><style face="normal" font="default"> technology</style></keyword><keyword><style face="normal" font="default"> water</style></keyword></keywords><dates><year Day="0" Month="0" Year="2003">2003</year></dates><abstract><style face="normal" font="default">Chlorine has been widely employed for the disinfection of drinking water. Additionally, it has the capacity to oxidize many organic compounds in water. Isoxaflutole (Balance; IXF) belongs to a new class of isoxazole herbicides. Isoxaflutole has a very short soil half-life and rapidly degrades to a stable and phytotoxic metabolite, diketonitrile (DKN). Further degradation of DKN produces a nonbiologically active benzoic acid (BA) metabolite. In experiments using high-performance liquid chromatography-UV spectroscopy (HPLC-UV) and HPLC tandem mass spectrometry (HPLC-MS/MS), DKN was found to rapidly react with hypochlorite in tap water, yielding the BA metabolite as the major end product. One milligram per liter (19 muM) of hypochlorite residue in tap water was able to completely oxidize up to 1600 mug/L (4.45 mumol/L) of DKN. In tap water, the disappearance of IXF was much more rapid than in DI water. As soon as the IXF is hydrolyzed to DKN, the DKN quickly reacts with the OCl- to form nonphytotoxic BA. As a result, the herbicide solutions prepared with tap water at 500 mug/L will no longer possess any herbicidal activity after 48 h of storage. However, in agronomic settings, highly concentrated tank solutions (600-800 mg/L) may be prepared with tap water since the conversion of IXF to BA would represent &lt;5% of the herbicide; therefore, any impact on the herbicide efficacy would be negligible. Results of this study show that current chlorination disinfection protocols in municipal water systems would completely eliminate the phytotoxic form of this new herbicide, DKN, from drinking water supplies; yet, farmers can use chlorinated tap water without significant loss of efficacy</style></abstract><notes><style face="normal" font="default">JArticleDEC 31Discipline: AGRICULTURE, MULTIDIDiscipline: IPLINARY; CHEMISTRY, APPLIED; FOOD Discipline: IENCE &amp; TECHNOLOGY</style></notes><urls><web-urls><url ppv-ref="no">ISI:000187565600028</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0020-150162.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>218</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Moran,S.</style></author><author><style face="normal" font="default"> Fitzgerald,G.</style></author><author><style face="normal" font="default"> Rango,A.</style></author><author><style face="normal" font="default"> Walthall,C.</style></author><author><style face="normal" font="default"> Barnes,E.</style></author><author><style face="normal" font="default"> Bausch,W.</style></author><author><style face="normal" font="default"> Clarke,T.</style></author><author><style face="normal" font="default"> Daughtry,C.</style></author><author><style face="normal" font="default"> Everitt,J.</style></author><author><style face="normal" font="default"> Escobar,D.</style></author><author><style face="normal" font="default"> Hatfield,J.</style></author><author><style face="normal" font="default"> Havstad,K.</style></author><author><style face="normal" font="default"> Jackson,T.</style></author><author><style face="normal" font="default"> Kitchen,N.</style></author><author><style face="normal" font="default"> Kustas,W.</style></author><author><style face="normal" font="default"> McGuire,M.</style></author><author><style face="normal" font="default"> Pinter,Jr.,P.</style></author><author><style face="normal" font="default"> Sudduth,K.</style></author><author><style face="normal" font="default"> Schepers,J.</style></author><author><style face="normal" font="default"> Schmugge,T.J.</style></author><author><style face="normal" font="default"> Starks,P.</style></author><author><style face="normal" font="default"> Upchurch,D.</style></author></authors></contributors><titles><title><style face="normal" font="default">Sensor development and radiometric correction for agricultural application</style></title><secondary-title><style face="normal" font="default">Journal of Photogrammetric Engineering and Remote Sensing</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Photogrammetric Engineering and Remote Sensing</style></full-title></periodical><pages end="718" start="705">705-718</pages><volume><style face="normal" font="default">69</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">sensor</style></keyword></keywords><dates><year Day="0" Month="0" Year="2003">2003</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0218-131046.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>179</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Price,R.R.</style></author><author><style face="normal" font="default"> Hummel,J.W.</style></author><author><style face="normal" font="default"> Birrell,S.J.</style></author><author><style face="normal" font="default"> Ahmad,I.S.</style></author></authors></contributors><auth-address><style face="normal" font="default">Louisiana State Univ, Dept Biol &amp; Agr Engn, Baton Rouge, LA 70803 USAUniv Missouri, USDA ARS, Columbia, MO USAIowa State Univ, Dept Agr &amp; Biol Syst Engn, Ames, IA USAUniv Illinois, Ctr Nanoscale Sci &amp; Technol, Urbana, IL 61801 USA</style></auth-address><titles><title><style face="normal" font="default">Rapid nitrate analysis of soil cores using ISFETs</style></title><secondary-title><style face="normal" font="default">Transactions of the Asae</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the Asae</style></full-title></periodical><pages end="610" start="601">601-610</pages><volume><style face="normal" font="default">46</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">AVAILABILITY</style></keyword><keyword><style face="normal" font="default"> contamination</style></keyword><keyword><style face="normal" font="default"> CONTINUOUS-FLOW ANALYSIS</style></keyword><keyword><style face="normal" font="default"> DENSITIES</style></keyword><keyword><style face="normal" font="default"> DENSITY</style></keyword><keyword><style face="normal" font="default"> environment</style></keyword><keyword><style face="normal" font="default"> extraction</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> FLOW</style></keyword><keyword><style face="normal" font="default"> GROUNDWATER QUALITY</style></keyword><keyword><style face="normal" font="default"> Illinois</style></keyword><keyword><style face="normal" font="default"> injection</style></keyword><keyword><style face="normal" font="default"> ION-SELECTIVE ELECTRODE</style></keyword><keyword><style face="normal" font="default"> Iowa</style></keyword><keyword><style face="normal" font="default"> membrane</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> MOISTURE</style></keyword><keyword><style face="normal" font="default"> MONITORING-SYSTEM</style></keyword><keyword><style face="normal" font="default"> NITRATE</style></keyword><keyword><style face="normal" font="default"> nitrates</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword><keyword><style face="normal" font="default"> precision farming</style></keyword><keyword><style face="normal" font="default"> prediction</style></keyword><keyword><style face="normal" font="default"> real-time</style></keyword><keyword><style face="normal" font="default"> sensors</style></keyword><keyword><style face="normal" font="default"> site-specific farming</style></keyword><keyword><style face="normal" font="default"> slope</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil moisture</style></keyword><keyword><style face="normal" font="default"> soil nitrate</style></keyword><keyword><style face="normal" font="default"> soil types</style></keyword><keyword><style face="normal" font="default"> SOIL-MOISTURE</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> TESTS</style></keyword><keyword><style face="normal" font="default"> TIME</style></keyword><keyword><style face="normal" font="default"> USDA</style></keyword></keywords><dates><year Day="0" Month="0" Year="2003">2003</year></dates><isbn><style face="normal" font="default">0001-2351</style></isbn><abstract><style face="normal" font="default">An intact core extraction procedure was tested that might be used in the field for real-time prediction of soil nitrates. An extraction solution was pushed through a soil core held between two filters, and an ion-selective field-effect transistor/flow injection analysis (ISFET/FIA) system was used to sense soil nitrates in real time. Laboratory tests were conducted using four soil types and two levels of nitrate concentration, soil moisture, core density, core length, core diameter, and extraction solution flow rate. The extraction solution flow was sampled at the exit face of the core and routed to the ISFET/FIA system. The ISFET output voltage was sampled at 100 Hz. Results of the test indicate that nitrate extraction Of the soil cores was successful, and that data descriptors based on response curve peak and slope of the ISFET nitrate response curve might be used in tandem in a real-time prediction system</style></abstract><notes><style face="normal" font="default">Times Cited: 1ArticleEnglishHummel, J. WUniv Missouri, USDA ARS, 269 Agr Engn Bldg, Columbia, MO 65211 USACited References Count: 31705CYAMER SOC AGRICULTURAL ENGINEERS2950 NILES RD, ST JOSEPH, MI 49085-9659 USAST JOSEPH</style></notes><urls><web-urls><url ppv-ref="no">ISI:000184379500001</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0179-129473.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>26</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Sudduth,K.A.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Bollero,G.A.</style></author><author><style face="normal" font="default"> Bullock,D.G.</style></author><author><style face="normal" font="default"> Wiebold,W.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Comparison of electromagnetic induction and direct sensing of soil electrical conductivity</style></title><secondary-title><style face="normal" font="default">Agronomy Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Agronomy Journal</style></full-title></periodical><pages end="482" start="472">472-482</pages><volume><style face="normal" font="default">95</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">CAPACITY</style></keyword><keyword><style face="normal" font="default"> cation exchange capacity</style></keyword><keyword><style face="normal" font="default"> CLAY</style></keyword><keyword><style face="normal" font="default"> correlation</style></keyword><keyword><style face="normal" font="default"> depth</style></keyword><keyword><style face="normal" font="default"> determination</style></keyword><keyword><style face="normal" font="default"> electrical conductivity</style></keyword><keyword><style face="normal" font="default"> ELECTRICAL-CONDUCTIVITY</style></keyword><keyword><style face="normal" font="default"> electromagnetic induction</style></keyword><keyword><style face="normal" font="default"> EM38</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> fields</style></keyword><keyword><style face="normal" font="default"> Illinois</style></keyword><keyword><style face="normal" font="default"> measurement</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> MOISTURE</style></keyword><keyword><style face="normal" font="default"> MULTIPLE LINEAR-REGRESSION</style></keyword><keyword><style face="normal" font="default"> PHYSICAL-PROPERTIES</style></keyword><keyword><style face="normal" font="default"> precision agriculture</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> SALINITY</style></keyword><keyword><style face="normal" font="default"> SALT</style></keyword><keyword><style face="normal" font="default"> sampling</style></keyword><keyword><style face="normal" font="default"> sand</style></keyword><keyword><style face="normal" font="default"> sensing</style></keyword><keyword><style face="normal" font="default"> sensor</style></keyword><keyword><style face="normal" font="default"> sensors</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil electrical conductivity</style></keyword><keyword><style face="normal" font="default"> soil moisture</style></keyword><keyword><style face="normal" font="default"> soil physical properties</style></keyword><keyword><style face="normal" font="default"> soil properties</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> SPATIAL PREDICTION</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword><keyword><style face="normal" font="default"> WATER-CONTENT</style></keyword></keywords><dates><year Day="0" Month="0" Year="2003">2003</year></dates><abstract><style face="normal" font="default">Apparent profile soil electrical conductivity (ECa) can be an indirect indicator of a number of soil physical and chemical properties. Commercially available ECa sensors can be used to efficiently and inexpensively develop the spatially dense data sets desirable for describing within-field spatial soil variability in precision agriculture. The objective of this research was to compare ECa measurements from a noncontact, electromagnetic induction-based sensor (Geonics EM38)(1) to those obtained with a coulter-based sensor (Veris 3100) and to relate ECa data to soil physical properties. Data were collected on two fields in Illinois (Argiudoll and Endoaquoll soils) and two in Missouri (Aqualfs). At 12 to 21 sampling sites in each field, 120-cm-deep soil cores were obtained for soil property determination. Depth response curves for each ECa sensor were derived or obtained from the literature. Within a single field and measurement date, EM38 data and Veris deep (0-100 cm depth) data were most highly correlated (r = 0.74-0.88). Differences between ECa sensors were more pronounced on the more layered Missouri soils due to differences in depth-weighted response curves. Correlations of ECa with response curve-weighted clay content and cation exchange capacity were generally highest and most persistent across all fields and ECa data types. Significant correlations were also seen with organic C on the Missouri fields and with silt content. Significant correlations of ECa With Soil moisture, sand content, or paste EC were observed only about 10% of the time. Data obtained with both types of ECa sensors were similar and exhibited similar relationships to soil physical and chemical properties</style></abstract><notes><style face="normal" font="default">JArticleMAY-JUNDiscipline: AGRONOMY</style></notes><urls><web-urls><url ppv-ref="no">ISI:000183256300002</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0026-123391.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>189</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Wang,D.</style></author><author><style face="normal" font="default"> Prato,T.</style></author><author><style face="normal" font="default"> Qiu,Z.</style></author><author><style face="normal" font="default"> Kitchen,N.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author></authors></contributors><titles><title><style face="normal" font="jmtib">Economic and Environmental Evaluation of Variable Rate Nitrogen and Lime Application for Claypan Soil Fields</style></title><secondary-title><style face="normal" font="default">Precision Agriculture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Precision Agriculture</style></full-title></periodical><pages end="52" start="35">35-52</pages><volume><style face="normal" font="default">4</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">applications</style></keyword><keyword><style face="normal" font="default"> area</style></keyword><keyword><style face="normal" font="default"> characteristics</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> CORN PRODUCTION</style></keyword><keyword><style face="normal" font="default"> corn yield</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> crop yield</style></keyword><keyword><style face="normal" font="default"> depth</style></keyword><keyword><style face="normal" font="default"> evaluation</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> fields</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword><keyword><style face="normal" font="default"> QUALITY</style></keyword><keyword><style face="normal" font="default"> RATES</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil pH</style></keyword><keyword><style face="normal" font="default"> technology</style></keyword><keyword><style face="normal" font="default"> topsoil</style></keyword><keyword><style face="normal" font="default"> topsoil depth</style></keyword><keyword><style face="normal" font="default"> variable rate technology</style></keyword><keyword><style face="normal" font="default"> variable-rate</style></keyword><keyword><style face="normal" font="default"> variation</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> water quality</style></keyword><keyword><style face="normal" font="default"> WATER-QUALITY</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> yields</style></keyword></keywords><dates><year Day="0" Month="0" Year="2003">2003</year></dates><publisher><style face="normal" font="default">Kluwer Academic Publishers</style></publisher><abstract><style face="normal" font="jmtir">Variable Rate Technology (VRT) has the potential to increase crop yields and improve water qualityrelative to Uniform Rate Technology (URT). The effects on profitability and water quality of adopting VRT fornitrogen (N) and lime were evaluated for corn production on four claypan soil fields in north central Missouriunder average to better than average weather conditions. Variable N and lime rates were based on measuredtopsoil depth and soil pH, respectively. VRTrates were compared to two different uniform N applications(URT-Nl based on the topsoil depth within these claypan soil fields, and URT-N2 based on a typical N ratefor corn production in this area). Expected corn yield was predicted based on topsoil depth, soil pH, N rate,and lime rate. Water quality benefits of VRTrelati ve to URTwere evaluated based on potential leachable N.Sensitivity analyses were performed using simulated topsoil data for topsoil depth and soil pH. Results showedthat VRTw as more profitable than URTin the four sample fields under URT-N1, and in two of the four fieldsunder URT-N2. Greater variation in topsoil depth and soil pH resulted in higher profitability and greater waterquality benefits with VRT. Results support adoption of VRT for N and lime application for other claypan soilfields with characteristics similar to those in the fields used in this study.</style></abstract><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0189-120972.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>30</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Wang,F.</style></author><author><style face="normal" font="default"> Fraisse,C.W.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Site-specific evaluation of the CROPGRO-soybean model on Missouri claypan soils</style></title><secondary-title><style face="normal" font="default">Agricultural Systems</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Agricultural Systems</style></full-title></periodical><pages end="1005" start="985">985-1005</pages><volume><style face="normal" font="default">76</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">area</style></keyword><keyword><style face="normal" font="default"> characteristics</style></keyword><keyword><style face="normal" font="default"> claypan soils</style></keyword><keyword><style face="normal" font="default"> CROPGRO</style></keyword><keyword><style face="normal" font="default"> DENSITY</style></keyword><keyword><style face="normal" font="default"> depth</style></keyword><keyword><style face="normal" font="default"> evaluation</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> fields</style></keyword><keyword><style face="normal" font="default"> GRAIN-YIELD</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> LAI</style></keyword><keyword><style face="normal" font="default"> leaf area index</style></keyword><keyword><style face="normal" font="default"> leaves</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> measurement</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> MOISTURE</style></keyword><keyword><style face="normal" font="default"> penetration</style></keyword><keyword><style face="normal" font="default"> performance</style></keyword><keyword><style face="normal" font="default"> root distribution</style></keyword><keyword><style face="normal" font="default"> site-specific</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil water</style></keyword><keyword><style face="normal" font="default"> soil water content</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> soybeans</style></keyword><keyword><style face="normal" font="default"> topsoil</style></keyword><keyword><style face="normal" font="default"> topsoil depth</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> WATER-BALANCE</style></keyword><keyword><style face="normal" font="default"> WATER-CONTENT</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword></keywords><dates><year Day="0" Month="0" Year="2003">2003</year></dates><abstract><style face="normal" font="default">Crop yield-is affected by many factors, primarily encompassing soil and weather conditions,and-crop management practices. Crop modeling can. be used to help understand how multiple factors interact and impact yield. The CROPGRO modeling package has been used extensively to assess the effects of management practices arid environmental conditions on soybean growth and development. However, the model has not been thoroughly evaluated for some environments that have unique characteristics such as claypan soils in which the depth to the claypan horizon-can vary greatly within fields. The objectives of this-study were to evaluate the performance of the CROPGRO-Soybean model for simulating-site-specific crop growth, soil water content, and grain yield on claypan soils. Data were obtained during low. and average rainfall conditions from two sites over 3 years in central Missouri. Plant (e.g. yield, leaf area, root length density) and soil (e.g. topsoil thickness, moisture, texture) measurements were collected for calibrating and validating the model. Results indicated-that CROPGRO-simulated soil water contents in the 15-90 cm soil profile agreed well with measured values. Simulated leaf area index and grain yield also agreed well with measured values during-average precipitation years; but were under-estimated during extremely dry years. Within-season precipitation and claypan soil topsoil depth were shown to have greatest influence on soybean yield. Although we hypothesized it to be otherwise, field measurements in 1997 showed that the claypan did not negatively affect soybean root penetration. (C) 2002 Elsevier Science Ltd. All rights reserved</style></abstract><notes><style face="normal" font="default">JArticleJUNDiscipline: AGRICULTURE, MULTIDIDiscipline: IPLINARY</style></notes><urls><web-urls><url ppv-ref="no">ISI:000182099300011</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0030-124337.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>43</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Ben-Hammouda,M.</style></author><author><style face="normal" font="default"> Ghorbal,H.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Oueslatt,O.</style></author></authors></contributors><titles><title><style face="normal" font="default">Autotoxicity of barley</style></title><secondary-title><style face="normal" font="default">Journal of Plant Nutrition</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Plant Nutrition</style></full-title></periodical><pages end="1161" start="1155">1155-1161</pages><volume><style face="normal" font="default">25</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">ALFALFA</style></keyword><keyword><style face="normal" font="default"> ALLELOPATHY</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> EXTRACTS</style></keyword><keyword><style face="normal" font="default"> GERMINATION</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> leaves</style></keyword><keyword><style face="normal" font="default"> PHYTOTOXICITY</style></keyword><keyword><style face="normal" font="default"> plant development</style></keyword><keyword><style face="normal" font="default"> PLANTS</style></keyword><keyword><style face="normal" font="default"> roots</style></keyword><keyword><style face="normal" font="default"> SEEDLINGS</style></keyword><keyword><style face="normal" font="default"> species</style></keyword><keyword><style face="normal" font="default"> stems</style></keyword><keyword><style face="normal" font="default"> water</style></keyword></keywords><dates><year Day="0" Month="0" Year="2002">2002</year></dates><abstract><style face="normal" font="default">Allelopathic potential of a crop species varies depending on stage of growth. Because allelopathy of barley (Hordeum vulgare L.), an important cereal grain adapted to semi-arid conditions of northern Tunisia, has not been widely reported, a study was conducted to determine i) the potential autotoxicity of barley and ii) the differential allelopathic potential of barley plant components over four phenological stages. The study involved experiments with barley seed germination and seedling growth bioassay techniques for detection of allelopathic activity. Plant parts of field-grown 'Rihane' barley were extracted with distilled water. At growth stage 4 (stems not well developed), whole plants were extracted. Thereafter, roots, stems, and leaves were extracted separately. Water extracts of 'Rihane' barley plant parts were bioassayed on four varieties of barley. Seedling growth bioassays revealed autotoxicity of barley, which appeared to be more pronounced on radicle growth than coleoptile growth, especially when plants near physiological maturity were extracted. Autotoxicity was not significant when 'Rihane' barley was simultaneously the donor and recipient of water extracts. Leaves were the most important source of allelopathic substances. Root extracts were least inhibitory toward both radicle and coleoptile growth. Results suggest qualitative and quantitative changes in allelopathic substances in barley plant parts during plant development</style></abstract><notes><style face="normal" font="default">JArticleDiscipline: PLANT Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:000176315500001</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0043-127169.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>39</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Blanco-Canqui,H.</style></author><author><style face="normal" font="default"> Gantzer,C.J.</style></author><author><style face="normal" font="default"> Anderson,S.H.</style></author><author><style face="normal" font="default"> Alberts,E.E.</style></author><author><style face="normal" font="default"> Ghidey,F.</style></author></authors></contributors><titles><title><style face="normal" font="default">Saturated hydraulic conductivity and its impact on simulated runoff for claypan soils</style></title><secondary-title><style face="normal" font="default">Soil Science Society of America Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil Science Society of America Journal</style></full-title></periodical><pages end="1602" start="1596">1596-1602</pages><volume><style face="normal" font="default">66</style></volume><number><style face="normal" font="default">5</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">claypan soils</style></keyword><keyword><style face="normal" font="default"> depth</style></keyword><keyword><style face="normal" font="default"> depth-to-claypan</style></keyword><keyword><style face="normal" font="default"> EROSION</style></keyword><keyword><style face="normal" font="default"> fertilizer</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> FLOW</style></keyword><keyword><style face="normal" font="default"> HYDRAULIC CONDUCTIVITY</style></keyword><keyword><style face="normal" font="default"> hydrology</style></keyword><keyword><style face="normal" font="default"> methodology</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> prediction</style></keyword><keyword><style face="normal" font="default"> runoff</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil depth</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> TILLAGE SYSTEMS</style></keyword><keyword><style face="normal" font="default"> topsoil</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword><keyword><style face="normal" font="default"> variation</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> ZONE</style></keyword></keywords><dates><year Day="0" Month="0" Year="2002">2002</year></dates><abstract><style face="normal" font="default">Saturated hydraulic conductivity (K-sat) is an essential parameter for understanding soil hydrology. This study evaluated the K., of in situ monoliths and intact cores and compared the results with other studies for Missouri claypan soils. These K-sat values were used as runoff-model inputs to assess the impact of K-sat variation on simulated runoff. Lateral in situ K-sat of the topsoil was determined on 250 by 500 by 230 rum deep monoliths. These values were compared with the K. of 76 by 76 mm diam. intact cores with and without bentonite to seal macropores. Mean (+/- SD) lateral in situ K-sat was 72 +/- 0.7 mm h(-1) and mean intact core K-sat without bentonite was 312 +/- 58 mm h(-1). The mean intact core K-sat without bentonite was significantly larger than the lateral in situ K-sat (P = 0.03). The lateral in situ K-sat was not different from core K-sat with bentonite (71 +/- 1.1 mm h(-1)). The intact core K-sat with bentonite differed from previous studies by 10 times. This was attributed to the variations in soil depth to claypan, macropore presence, and methodology. The impact of using an effective hydraulic conductivity (K-eff) computed from measured K-sat on intact cores without bentonite underestimated the Water Erosion Prediction Project (WEPP) simulated runoff by 28% for a measured runoff event of 40 mm. The core K-sat with bentonite was correlated with measured runoff from long-term erosion-runoff plots. A quadratic regression explained 95% of the variability between measured and simulated runoff</style></abstract><notes><style face="normal" font="default">JArticleSEP-OCTDiscipline: AGRICULTURE, SOIL Discipline: IENCE</style></notes><urls><web-urls><url ppv-ref="no">ISI:000177977100022</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0039-129557.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>36</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Chung,S.O.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Drummond,S.T.</style></author></authors></contributors><titles><title><style face="normal" font="default">Determining yield monitoring system delay time with geostatistical and data segmentation approaches</style></title><secondary-title><style face="normal" font="default">Transactions of the Asae</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the Asae</style></full-title></periodical><pages end="926" start="915">915-926</pages><volume><style face="normal" font="default">45</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">agricultural engineering</style></keyword><keyword><style face="normal" font="default"> area</style></keyword><keyword><style face="normal" font="default"> COMBINE</style></keyword><keyword><style face="normal" font="default"> combine harvesting</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> data segmentation</style></keyword><keyword><style face="normal" font="default"> delay time</style></keyword><keyword><style face="normal" font="default"> electrical conductivity</style></keyword><keyword><style face="normal" font="default"> ELECTRICAL-CONDUCTIVITY</style></keyword><keyword><style face="normal" font="default"> estimation</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> fields</style></keyword><keyword><style face="normal" font="default"> geostatistics</style></keyword><keyword><style face="normal" font="default"> GRAIN-YIELD</style></keyword><keyword><style face="normal" font="default"> harvesting</style></keyword><keyword><style face="normal" font="default"> maps</style></keyword><keyword><style face="normal" font="default"> measurement</style></keyword><keyword><style face="normal" font="default"> MOISTURE</style></keyword><keyword><style face="normal" font="default"> monitoring</style></keyword><keyword><style face="normal" font="default"> precision agriculture</style></keyword><keyword><style face="normal" font="default"> sensing</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil electrical conductivity</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> yield map</style></keyword><keyword><style face="normal" font="default"> yield monitor</style></keyword></keywords><dates><year Day="0" Month="0" Year="2002">2002</year></dates><abstract><style face="normal" font="default">In combine harvesting, knowledge of the delay time from cutting the crop to sensing the grain flow is required for accurate spatial location of grain yield data. Currently, either an assumed, fixed delay time is used or the delay time is determined by visual inspection of yield maps. Geostatistical and data segmentation methods were developed to estimate yield monitoring system delay time using objective criteria. The methods were validated with an ideal dataset and with elevation and soil electrical conductivity datasets having known delay times. When applied to yield and moisture content measurements collected with a commercial yield monitoring system, the methods successfully estimated delay time. In most cases, the results agreed (+/-1 s) with results achieved using a visual method. Grain yield and grain moisture content exhibited different delay times at different locations within test fields. Thus, it may be appropriate to apply delay time corrections to homogeneous sub-field areas, instead of on a whole-field basis. Use of these new estimation methods could allow for more accurate and efficient processing of yield monitor data</style></abstract><notes><style face="normal" font="default">JArticleJUL-AUGDiscipline: AGRICULTURAL ENGINEERING</style></notes><urls><web-urls><url ppv-ref="no">ISI:000179098300006</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0036-128359.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>216</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Clay,D.E.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Carlson,C.G.</style></author><author><style face="normal" font="default"> Kleinjan,J.L.</style></author><author><style face="normal" font="default"> Tjentland,W.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Collecting representative soil samples for N and P fertilizer recommendations</style></title><secondary-title><style face="normal" font="default">Crop Management</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Crop Management</style></full-title></periodical><pages end="" start="">-</pages><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">fertilizer</style></keyword><keyword><style face="normal" font="default"> RECOMMENDATIONS</style></keyword><keyword><style face="normal" font="default"> SAMPLES</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword></keywords><dates><year Day="0" Month="0" Year="2002">2002</year></dates><work-type><style face="normal" font="default">10.1094/CM-2002-1216-01-ma</style></work-type><urls><web-urls><url ppv-ref="no">http://www.plantmanagementnetwork.org/pub/cm/management/np/</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0216-142409.pdf</url></pdf-urls></urls><misc3><style face="normal" font="default">10.1094/CM-2002-1216-01-ma</style></misc3></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>37</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Glyphosate effects on ground cover of tall fescue waterways and estimated soil erosion</style></title><secondary-title><style face="normal" font="default">Journal of Soil and Water Conservation</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Soil and Water Conservation</style></full-title></periodical><pages end="243" start="237">237-243</pages><volume><style face="normal" font="default">57</style></volume><number><style face="normal" font="default">5</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">AMMONIA</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> EROSION</style></keyword><keyword><style face="normal" font="default"> FESTUCA-ARUNDINACEA</style></keyword><keyword><style face="normal" font="default"> forage</style></keyword><keyword><style face="normal" font="default"> glyphosate</style></keyword><keyword><style face="normal" font="default"> grass waterways</style></keyword><keyword><style face="normal" font="default"> GROUND COVER</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> losses</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> PASTURE</style></keyword><keyword><style face="normal" font="default"> RATES</style></keyword><keyword><style face="normal" font="default"> RENOVATION</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SOIL LOSS</style></keyword><keyword><style face="normal" font="default"> tall fescue</style></keyword><keyword><style face="normal" font="default"> volume</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword></keywords><dates><year Day="0" Month="0" Year="2002">2002</year></dates><abstract><style face="normal" font="default">Glyphosate use for controlling weeds has increased in the Midwest, but drift or overspraying can damage tall fescue waterways. Farmers and conservation agents fear that glyphosate may reduce tall fescue ground cover in waterways and increase soil erosion. Glyphosate was applied in mid-May to tall fescue waterways at several rates from 0.14 to 2.24 kg ai/ha(1) + ammonium sulfate (2% by volume) to simulate drift or direct overspraying. Percentage cover of live and dead tall fescue, broadleaf weeds, and bare soil was measured after treatment at two sites in Missouri, and annual erosion was estimated using revised universal soil loss equation (RUSLE) software. Total (live + dead) tall fescue ground cover remained greater than 88% even at 10 to 11 months after treatment. Enough live tall fescue remained to grow into gaps. Glyphosate drift at low rates or single accidental incidents of overspraying glyphosate Up to 2.24 kg ai/ha are unlikely to permanently damage tall fescue waterways</style></abstract><notes><style face="normal" font="default">JArticleSEP-OCTDiscipline: AGRICULTURE, SOIL Discipline: IENCE; ECOLOGY; WATER RESOURCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:000178600300008</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0037-128810.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>225</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Hong,S.Y.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Palm,H.L.</style></author><author><style face="normal" font="default"> Wiebold,W.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Using airborne hyperspectral and satellite multispectral data to quantify within-field spatial variability</style></title><secondary-title><style face="normal" font="default">Korean Journal of Precision Agriculture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Korean Journal of Precision Agriculture</style></full-title></periodical><pages end="98" start="82">82-98</pages><volume><style face="normal" font="default">1</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">satellite</style></keyword><keyword><style face="normal" font="default"> SPATIAL VARIABILITY</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword></keywords><dates><year Day="0" Month="0" Year="2002">2002</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0225-134882.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>196</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kitchen,N.R.</style></author><author><style face="normal" font="default"> Snyder,C.J.</style></author><author><style face="normal" font="default"> Franzen,D.W.</style></author><author><style face="normal" font="default"> Wiebold,W.J.</style></author></authors></contributors><titles><title><style face="normal" font="jmtib">Educational Needs of Precision Agriculture</style></title><secondary-title><style face="normal" font="default">Precision Agriculture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Precision Agriculture</style></full-title></periodical><pages end="351" start="341">341-351</pages><volume><style face="normal" font="default">3</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">AVAILABILITY</style></keyword><keyword><style face="normal" font="default"> information</style></keyword><keyword><style face="normal" font="default"> learning</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> METHODS</style></keyword><keyword><style face="normal" font="default"> precision agriculture</style></keyword><keyword><style face="normal" font="default"> QUALITY</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> technology</style></keyword></keywords><dates><year Day="0" Month="0" Year="2002">2002</year></dates><publisher><style face="normal" font="jmtir">Kluwer Academic Publishers.</style></publisher><abstract><style face="normal" font="default">Reluctance towards implementation of precision agriculture seems to be based upon accessibility to well-trained, knowledgeable people, and the cost and availability to obtain quality education, training, and products. Given that precision agriculture is rapidly changing and the current trend for accelerated information exchange,  educators of precision agriculture face the challenge of keeping pace and providing quality educational programs. This paper addresses how precision agriculture educational programs can be improved.  Specific barriers to adoption of precision agriculture are discussed. The learning process of precision agriculture technologies and methods are outlined as six sequential steps. These steps represent a process of increased learning and skill proficiency against which those individuals developing precision agriculture education can use to build and target their programs. The optimal value of information for precision agriculture will be best achieved by producers, agribusinesses, and educators as they improve their: 1) agronomic knowledge and skills, 2) computer and information management skills, and 3) understanding of precision agriculture as a system for increasing knowledge.</style></abstract><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0196-114689.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>45</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Li,J.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Ross,L.M.</style></author></authors></contributors><titles><title><style face="normal" font="default">Electron microscopy of root colonization of Setaria viridis by deleterious rhizobacteria as affected by soil properties</style></title><secondary-title><style face="normal" font="default">Symbiosis</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Symbiosis</style></full-title></periodical><pages end="13" start="1">1-13</pages><volume><style face="normal" font="default">32</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">ADAPTATION</style></keyword><keyword><style face="normal" font="default"> biomass</style></keyword><keyword><style face="normal" font="default"> colonization</style></keyword><keyword><style face="normal" font="default"> FLUORESCENT PSEUDOMONADS</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> organic matter</style></keyword><keyword><style face="normal" font="default"> ORGANIC-MATTER</style></keyword><keyword><style face="normal" font="default"> plant growth suppression</style></keyword><keyword><style face="normal" font="default"> PLANT-PATHOGENS</style></keyword><keyword><style face="normal" font="default"> PLANTS</style></keyword><keyword><style face="normal" font="default"> POTATO</style></keyword><keyword><style face="normal" font="default"> pseudomonads</style></keyword><keyword><style face="normal" font="default"> RHIZOBACTERIA</style></keyword><keyword><style face="normal" font="default"> rhizosphere</style></keyword><keyword><style face="normal" font="default"> roots</style></keyword><keyword><style face="normal" font="default"> SEEDLINGS</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil microcosms</style></keyword><keyword><style face="normal" font="default"> soil pH</style></keyword><keyword><style face="normal" font="default"> soil properties</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword></keywords><dates><year Day="0" Month="0" Year="2002">2002</year></dates><abstract><style face="normal" font="default">Root colonization of green foxtail (Setaria viridis) seedlings grown in three different soils inoculated with selected deleterious rhizobacteria (DRB) was studied using scanning electron microscopy. The three DRB originated from Setaria faberi seedlings growing in soils under different management and with different organic matter and pH. The DRB strains reduced green foxtail seedling growth 50% in agar bioassays. Green foxtail seedling shoot growth was significantly affected by the interaction of soil and DRB. Electron microscopic observations revealed the DRB strains preferentially colonized root surface crevices over ridges. Each strain densely colonized roots of green foxtail when inoculated in its native soil, probably due to adaptation to the particular chemical, physical, and biological properties embodied by each soil. Bacterial colonization and establishment on seedling roots led to growth inhibition. Pseudomonas fluorescens strain L2-19 and Stenotrophomonas maltophilia strain TFR1 significantly reduced. green foxtail growth in all three soils, however, P. putida strain B1-7 inhibited green foxtail only in the high organic matter, high pH soil under an organic farming management system.All three strains significantly inhibited green foxtail shoot growth in the organically managed soil, indicating that organic matter content is an important factor affecting growth suppressive activity of DRB. In general, seedlings grown in an uncultivated prairie soil with high organic matter and low pH produced less biomass than those grown in other soils. This suggests that soil pH also may be involved in the growth suppression of host plants by DRB</style></abstract><notes><style face="normal" font="default">JArticleDiscipline: MICROBIOLOGY</style></notes><urls><web-urls><url ppv-ref="no">ISI:000174298500001</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0045-123259.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>38</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lin,C.H.</style></author><author><style face="normal" font="default"> Lerch,R.N.</style></author><author><style face="normal" font="default"> Thurman,E.M.</style></author><author><style face="normal" font="default"> Garrett,H.E.</style></author><author><style face="normal" font="default"> George,M.F.</style></author></authors></contributors><titles><title><style face="normal" font="default">Determination of isoxaflutole (balance) and its metabolites in water using solid phase extraction followed by high-performance liquid chromatography with ultraviolet or mass spectrometry</style></title><secondary-title><style face="normal" font="default">Journal of Agricultural and Food Chemistry</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Agricultural and Food Chemistry</style></full-title></periodical><pages end="5824" start="5816">5816-5824</pages><volume><style face="normal" font="default">50</style></volume><number><style face="normal" font="default">21</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">ACIDS</style></keyword><keyword><style face="normal" font="default"> atrazine</style></keyword><keyword><style face="normal" font="default"> benzoic acid</style></keyword><keyword><style face="normal" font="default"> benzoic acid metabolite,HPLC-MS</style></keyword><keyword><style face="normal" font="default"> chromatography</style></keyword><keyword><style face="normal" font="default"> degradation</style></keyword><keyword><style face="normal" font="default"> determination</style></keyword><keyword><style face="normal" font="default"> diketonitrile</style></keyword><keyword><style face="normal" font="default"> DIOXYGENASE</style></keyword><keyword><style face="normal" font="default"> extraction</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> high performance liquid chromatography</style></keyword><keyword><style face="normal" font="default"> HPLC-UV</style></keyword><keyword><style face="normal" font="default"> isoxaflutole</style></keyword><keyword><style face="normal" font="default"> mass</style></keyword><keyword><style face="normal" font="default"> mass spectrometry</style></keyword><keyword><style face="normal" font="default"> MASS-SPECTROMETRY</style></keyword><keyword><style face="normal" font="default"> metabolites</style></keyword><keyword><style face="normal" font="default"> MODE</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> technology</style></keyword><keyword><style face="normal" font="default"> transport</style></keyword><keyword><style face="normal" font="default"> water</style></keyword></keywords><dates><year Day="0" Month="0" Year="2002">2002</year></dates><abstract><style face="normal" font="default">Balance (isoxaflutole, IXF) belongs to a new family of herbicides referred to as isoxazoles. IXF has a very short soil half-life (&lt;24 h), degrading to a biologically active diketonitrile (DKN) metabolite that is more polar and considerably more stable. Further degradation of the DKN metabolite produces a nonbiologically active benzoic acid (BA) metabolite. Analytical methods using solid phase extraction followed by high-performance liquid chromatography-UV (HPLC-UV) or high-performance liquid chromatography-mass spectrometry (HPLC-MS) were developed for the analysis of IXF and its metabolites in distilled deionized water and ground water samples. To successfully detect and quantify the BA metabolite by HPLC-UV from ground water samples, a sequential elution scheme was necessary. Using HPLC-UV, the mean recoveries from sequential elution of the parent and its two metabolites from fortified ground water samples ranged from 68.6 to 101.4%. For HPLC-MS, solid phase extraction of ground water samples was performed using a polystyrene divinylbenzene polymer resin. The mean HPLC-MS recoveries of the three compounds from ground water samples spiked at 0.05-2 mug/L ranged from 100.9 to 110.3%. The limits of quantitation for HPLC-UV are approximately 150 ng/L for IXF, 100 ng/L for DKN, and 250 ng/L for BA. The limit of quantitation by HPLC-MS is 50 ng/L for each compound. The methods developed in this work can be applied to determine the transport and fate of Balance in the environment</style></abstract><notes><style face="normal" font="default">JArticleOCT 9Discipline: AGRICULTURE, MULTIDIDiscipline: IPLINARY; CHEMISTRY, APPLIED; FOOD Discipline: IENCE &amp; TECHNOLOGY</style></notes><urls><web-urls><url ppv-ref="no">ISI:000178501300008</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0038-134864.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>33</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Renschler,C.S.</style></author><author><style face="normal" font="default"> Flanagan,D.C.</style></author><author><style face="normal" font="default"> Engel,B.A.</style></author><author><style face="normal" font="default"> Kramer,L.A.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Site-specific decision-making based on RTK GPS survey and six alternative elevation data sources: Watershed topography and delineation</style></title><secondary-title><style face="normal" font="default">Transactions of the Asae</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the Asae</style></full-title></periodical><pages end="1895" start="1883">1883-1895</pages><volume><style face="normal" font="default">45</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">accuracy</style></keyword><keyword><style face="normal" font="default"> agricultural engineering</style></keyword><keyword><style face="normal" font="default"> area</style></keyword><keyword><style face="normal" font="default"> data collection</style></keyword><keyword><style face="normal" font="default"> decision making</style></keyword><keyword><style face="normal" font="default"> DEM</style></keyword><keyword><style face="normal" font="default"> drainage</style></keyword><keyword><style face="normal" font="default"> EROSION</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> global positioning system</style></keyword><keyword><style face="normal" font="default"> global positioning systems</style></keyword><keyword><style face="normal" font="default"> GPS</style></keyword><keyword><style face="normal" font="default"> information</style></keyword><keyword><style face="normal" font="default"> maps</style></keyword><keyword><style face="normal" font="default"> measurement</style></keyword><keyword><style face="normal" font="default"> NETWORK</style></keyword><keyword><style face="normal" font="default"> precision agriculture</style></keyword><keyword><style face="normal" font="default"> precision farming</style></keyword><keyword><style face="normal" font="default"> site-specific</style></keyword><keyword><style face="normal" font="default"> slope</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> technology</style></keyword><keyword><style face="normal" font="default"> TESTS</style></keyword><keyword><style face="normal" font="default"> topography</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> water conservation</style></keyword><keyword><style face="normal" font="default"> watershed</style></keyword></keywords><dates><year Day="0" Month="0" Year="2002">2002</year></dates><abstract><style face="normal" font="default">Soil erosion modeling and assessment requires substantial and accurate topographic data to obtain meaningful results for decision-making regarding soil and water conservation practices. Today's precision farming equipment includes Global Positioning System (GPS) technology to determine the location of spatially distributed data. Besides the main purpose of tagging site-specific information to a unique location (x and y), the elevation data (z) recorded has the potential to be used for topographic analysis, including delineation of flowpaths, channels, and watershed boundaries. In addition to GPS-based data collection at various accuracy levels, surveying companies and the U.S. Geological Survey also provide alternative sources of topographic information. Spatial statistical tests were performed to determine if some of these data sources-in particular the ones free of charge or gathered with inexpensive equipment-are sufficiently accurate to represent field or watershed topography and meaningfully apply detailed, process-based soil erosion assessment tools. The most expensive alternatives were most useful for determining elevation and slopes in the flow direction, while there was not much difference between alternatives in obtaining upslope drainage areas and delineation of the channel network and watershed boundary. This is the first of two articles analyzing the impact of the accuracy of six alternative topographic data sources on watershed topography and delineation in comparison to GPS measurements using a survey-grade cm-accuracy GPS</style></abstract><notes><style face="normal" font="default">JArticleNOV-DECDiscipline: AGRICULTURAL ENGINEERING</style></notes><urls><web-urls><url ppv-ref="no">ISI:000181125600018</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0033-133853.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>34</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Scharf,P.C.</style></author><author><style face="normal" font="default"> Schmidt,J.P.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Hong,S.Y.</style></author><author><style face="normal" font="default"> Lory,J.A.</style></author><author><style face="normal" font="default"> Davis,J.G.</style></author></authors></contributors><titles><title><style face="normal" font="default">Remote sensing for nitrogen management</style></title><secondary-title><style face="normal" font="default">Journal of Soil and Water Conservation</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Soil and Water Conservation</style></full-title></periodical><pages end="524" start="518">518-524</pages><volume><style face="normal" font="default">57</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">aerial</style></keyword><keyword><style face="normal" font="default"> applications</style></keyword><keyword><style face="normal" font="default"> color</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> crop production</style></keyword><keyword><style face="normal" font="default"> crop yield</style></keyword><keyword><style face="normal" font="default"> fertilizer</style></keyword><keyword><style face="normal" font="default"> FERTILIZER NITROGEN</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> fields</style></keyword><keyword><style face="normal" font="default"> imagery</style></keyword><keyword><style face="normal" font="default"> information</style></keyword><keyword><style face="normal" font="default"> landscapes</style></keyword><keyword><style face="normal" font="default"> losses</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> MOISTURE</style></keyword><keyword><style face="normal" font="default"> N-fertilizer</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword><keyword><style face="normal" font="default"> organic matter</style></keyword><keyword><style face="normal" font="default"> ORGANIC-MATTER</style></keyword><keyword><style face="normal" font="default"> RECOMMENDATIONS</style></keyword><keyword><style face="normal" font="default"> reflectance</style></keyword><keyword><style face="normal" font="default"> remote sensing</style></keyword><keyword><style face="normal" font="default"> satellite</style></keyword><keyword><style face="normal" font="default"> sensing</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil moisture</style></keyword><keyword><style face="normal" font="default"> soil organic matter</style></keyword><keyword><style face="normal" font="default"> spectral</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> technology</style></keyword><keyword><style face="normal" font="default"> TESTS</style></keyword><keyword><style face="normal" font="default"> variable-rate</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> yields</style></keyword></keywords><dates><year Day="0" Month="0" Year="2002">2002</year></dates><abstract><style face="normal" font="default">Nitrogen application often dramatically increases crop yields, but N needs vary spatially across fields and landscapes. Remote sensing collects spatially dense information that may contribute to, or provide feedback about, N management decisions. There is potential to accurately predict N fertilizer need at each point in the field. This would reduce surplus N in the crop production system without reducing crop yield, which would in turn reduce N losses to surface and ground waters. Soil spectral properties (color) are related to soil organic matter and soil moisture levels, factors that influence the N-supplying ability of the soil. Plant spectral properties reflect crop N status and soil N availability, and they can be useful for directing in-season variable-rate N applications. Plant color may also be useful for assessing the adequacy of crop nitrogen supply achieved with a given nitrogen management practice. We outline the current status of these approaches, offer examples, discuss several N management contexts in which these approaches might be used, and consider possible future directions for this technology</style></abstract><notes><style face="normal" font="default">JArticleNOV-DECDiscipline: AGRICULTURE, SOIL Discipline: IENCE; ECOLOGY; WATER RESOURCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:000180463500032</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0034-131362.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>35</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Swisher,D.W.</style></author><author><style face="normal" font="default"> Borgelt,S.C.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Optical sensor for granular fertilizer flow rate measurement</style></title><secondary-title><style face="normal" font="default">Transactions of the Asae</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the Asae</style></full-title></periodical><pages end="888" start="881">881-888</pages><volume><style face="normal" font="default">45</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">accuracy</style></keyword><keyword><style face="normal" font="default"> agricultural engineering</style></keyword><keyword><style face="normal" font="default"> calibration</style></keyword><keyword><style face="normal" font="default"> data analysis</style></keyword><keyword><style face="normal" font="default"> design</style></keyword><keyword><style face="normal" font="default"> fertilizer</style></keyword><keyword><style face="normal" font="default"> granular flow</style></keyword><keyword><style face="normal" font="default"> light</style></keyword><keyword><style face="normal" font="default"> mass</style></keyword><keyword><style face="normal" font="default"> measurement</style></keyword><keyword><style face="normal" font="default"> optical measurement</style></keyword><keyword><style face="normal" font="default"> precision farming</style></keyword><keyword><style face="normal" font="default"> RATES</style></keyword><keyword><style face="normal" font="default"> sensor</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> TESTS</style></keyword></keywords><dates><year Day="0" Month="0" Year="2002">2002</year></dates><abstract><style face="normal" font="default">An optical sensor to measure granular fertilizer flow in an airstream was designed, built, and laboratory tested. The sensor components included a laser line generator that transmitted light across a trapezoidal chamber to a 32-element photodiode array. The air-suspended granules would break the light, causing a count to be recorded. The counts were translated into a mass flow rate. Static tests of five materials and six mass flow rates were performed in a replicated block design. Dynamic tests of one material with six step changes in mass flow rate were performed. Results of the static tests showed a strong linear, repeatable relationship between sensor output and mass flow rate. For maximum accuracy, individual calibrations were required for different fertilizer products. Dynamic test results showed that the sensor followed step changes in mass flow rate well, but indicated some limitations in the data analysis algorithm. The optical sensor system showed potential as a first step to a real-time granular fertilizer flow rate sensor</style></abstract><notes><style face="normal" font="default">JArticleJUL-AUGDiscipline: AGRICULTURAL ENGINEERING</style></notes><urls><web-urls><url ppv-ref="no">ISI:000179098300002</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0035-119027.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>224</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Wrather,J.A.</style></author><author><style face="normal" font="default"> Stevens,T.L.</style></author><author><style face="normal" font="default"> Kitchen,N.</style></author></authors></contributors><titles><title><style face="normal" font="default">Effects of site-specific application of aldicarb on cotton in a meloidogyne imcognita-infested field</style></title><secondary-title><style face="normal" font="default">Journal of Nematology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Nematology</style></full-title></periodical><pages end="119" start="115">115-119</pages><volume><style face="normal" font="default">34</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">site-specific</style></keyword><keyword><style face="normal" font="default"> aldicarb</style></keyword><keyword><style face="normal" font="default"> cotton</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword></keywords><dates><year Day="0" Month="0" Year="2002">2002</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0224-121451.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>56</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Ben-Hammouda,M.</style></author><author><style face="normal" font="default"> Ghorbal,H.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Oueslati,O.</style></author></authors></contributors><titles><title><style face="normal" font="default">Allelopathic effects of barley extracts on germination and seedlings growth of bread and durum wheats</style></title><secondary-title><style face="normal" font="default">Agronomie</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Agronomie</style></full-title></periodical><pages end="71" start="65">65-71</pages><volume><style face="normal" font="default">21</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">ALLELOPATHY</style></keyword><keyword><style face="normal" font="default"> barley</style></keyword><keyword><style face="normal" font="default"> bread wheat</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> durum wheat</style></keyword><keyword><style face="normal" font="default"> EXTRACTS</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> GERMINATION</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> leaves</style></keyword><keyword><style face="normal" font="default"> PHYTOTOXICITY</style></keyword><keyword><style face="normal" font="default"> PLANTS</style></keyword><keyword><style face="normal" font="default"> roots</style></keyword><keyword><style face="normal" font="default"> SEEDLINGS</style></keyword><keyword><style face="normal" font="default"> SORGHUM-BICOLOR</style></keyword><keyword><style face="normal" font="default"> species</style></keyword><keyword><style face="normal" font="default"> stems</style></keyword><keyword><style face="normal" font="default"> Triticum aestivum</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> WEEDS</style></keyword><keyword><style face="normal" font="default"> WHEAT</style></keyword></keywords><dates><year Day="0" Month="0" Year="2001">2001</year></dates><abstract><style face="normal" font="default">Phytotoxicity of barley extracts (Hordeum vulgare L.) on durum wheat (Triticum durum L.) and bread wheat (Triticum aestivum L.) was investigated. Water extracts of barley, variety Rihane were bioassayed on germination and seedling growth of both wheat species to: (i) test the heterotoxicity of barley on wheat, (ii) study the dynamics of allelopathic potential over four growth stages and (iii) identify the most allelopathic plant part of barley. Whole barley plants were extracted at growth stage 4 (stems not developed enough), whilst for the following growth stages roots, stems, and leaves were extracted separately. Seedling growth bioassays demonstrated that the two wheat species responded differently to the allelopathic potential of barley with a greater sensitivity shown by the bread wheats. For both wheat species, radicle growth was more depressed than coleoptile growth, though stimulation of seedling growth was observed for durum wheat. The allelopathic potential of barley plant parts was not stable over its life cycle for either bread or durum wheat. It appeared that potential increased near physiological maturity. Leaves and roots were the most phytotoxic barley plant parts for durum and bread wheats, respectively. Results suggested that the response by durum wheat and bread wheat varied depending on the source of allelochemicals (plant part) and the growth stage of the barley plant. Consequently, barley should be considered a depressive prior crop for both durum wheat and bread wheat in a field cropping sequence</style></abstract><notes><style face="normal" font="default">JArticleJAN-FEBDiscipline: AGRONOMY</style></notes><urls><web-urls><url ppv-ref="no">ISI:000166553200006</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0056-127168.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>172</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Birrell,S.J.</style></author><author><style face="normal" font="default"> Hummel,J.W.</style></author></authors></contributors><auth-address><style face="normal" font="default">Univ Missouri, USDA ARS, Cropping Syst &amp; Water Qual Res Unit, Columbia, MO 65211 USAIowa State Univ, Ames, IA 50011 USA</style></auth-address><titles><title><style face="normal" font="default">Real-time multi ISFET/FIA soil analysis system with automatic sample extraction</style></title><secondary-title><style face="normal" font="default">Computers and Electronics in Agriculture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Computers and Electronics in Agriculture</style></full-title></periodical><pages end="67" start="45">45-67</pages><volume><style face="normal" font="default">32</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">accuracy</style></keyword><keyword><style face="normal" font="default"> AMMONIUM-IONS</style></keyword><keyword><style face="normal" font="default"> calibration</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> crop management</style></keyword><keyword><style face="normal" font="default"> extraction</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> FIELD-EFFECT TRANSISTORS</style></keyword><keyword><style face="normal" font="default"> FLOW</style></keyword><keyword><style face="normal" font="default"> flow injection analysis</style></keyword><keyword><style face="normal" font="default"> FLOW-INJECTION ANALYSIS</style></keyword><keyword><style face="normal" font="default"> injection</style></keyword><keyword><style face="normal" font="default"> ION-SELECTIVE ELECTRODES</style></keyword><keyword><style face="normal" font="default"> Iowa</style></keyword><keyword><style face="normal" font="default"> ISFET's</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> MERGING ZONES</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> NITRATE</style></keyword><keyword><style face="normal" font="default"> nitrates</style></keyword><keyword><style face="normal" font="default"> PLANT MATERIAL</style></keyword><keyword><style face="normal" font="default"> POLYMERIC MEMBRANES</style></keyword><keyword><style face="normal" font="default"> potassium</style></keyword><keyword><style face="normal" font="default"> RAPID-DETERMINATION</style></keyword><keyword><style face="normal" font="default"> SAMPLES</style></keyword><keyword><style face="normal" font="default"> sensing</style></keyword><keyword><style face="normal" font="default"> sensor</style></keyword><keyword><style face="normal" font="default"> site-specific</style></keyword><keyword><style face="normal" font="default"> site-specific crop management</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil analysis</style></keyword><keyword><style face="normal" font="default"> soil nitrate</style></keyword><keyword><style face="normal" font="default"> soil sensor</style></keyword><keyword><style face="normal" font="default"> spatial variation</style></keyword><keyword><style face="normal" font="default"> SPECTROPHOTOMETRIC DETERMINATION</style></keyword><keyword><style face="normal" font="default"> STAGE</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> technology</style></keyword><keyword><style face="normal" font="default"> TIME</style></keyword><keyword><style face="normal" font="default"> USDA</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword><keyword><style face="normal" font="default"> variation</style></keyword><keyword><style face="normal" font="default"> volume</style></keyword><keyword><style face="normal" font="default"> water</style></keyword></keywords><dates><year Day="0" Month="0" Year="2001">2001</year></dates><isbn><style face="normal" font="default">0168-1699</style></isbn><abstract><style face="normal" font="default">Successful implementation of site-specific crop management relies on accurate quantification of spatial variation of important factors. Therefore, there is a tremendous need for the development of sensing technologies that will allow automated collection of soil, crop and pest data, to more accurately characterize within-field variability. The objective of this work was to develop an integrated multi-sensor soil analysis system. Ion-selective field effect transistor (ISFET) technology was coupled with Bow injection analysis (FIA) to produce a real-time soil analysis system. Testing of the ISFET/FIA system for soil analysis was carried out in two stages: (1) using manually extracted samples, and (2) the soil to be analysed was placed in the automated soil extraction system, and the extracted solution fed directly into the FIA system. The sensor was successful in measuring soil nitrates in manually extracted soil solutions (r(2) > 0.9). The rapid response of the system allowed a sample to be analysed in 1.25 s, which is satisfactory for real-time soil sensing. Precision and accuracy of the system were highly dependent on maintaining precise, repetitive injection times and maintaining constant flow parameters during the calibration and testing cycle. The progress toward an automated soil extraction system was notable, but considerable effort will be necessary before commercialization can be realized. However, the concept of using ISFETs for the real-time analysis of soil nitrates is sound. The rapid response and low sample volumes required by the multi-sensor ISFET/FIA system make it a viable candidate for use in real-time soil nutrient sensing. (C) Published by Elsevier Science B.V</style></abstract><notes><style face="normal" font="default">Times Cited: 5ArticleEnglishHummel, J. WUniv Missouri, USDA ARS, Cropping Syst &amp; Water Qual Res Unit, 269 Ag Engr Bldg, Columbia, MO 65211 USACited References Count: 48435XUELSEVIER SCI LTDTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDOXFORD</style></notes><urls><web-urls><url ppv-ref="no">ISI:000168908100004</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0172-107448.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>44</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Between-row mowing plus banded herbicide to control annual weeds and reduce herbicide use in no-till soybean (Glycine max) and corn (Zea mays)</style></title><secondary-title><style face="normal" font="default">Weed Technology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Technology</style></full-title></periodical><pages end="584" start="576">576-584</pages><volume><style face="normal" font="default">15</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">alachlor</style></keyword><keyword><style face="normal" font="default"> area</style></keyword><keyword><style face="normal" font="default"> atrazine</style></keyword><keyword><style face="normal" font="default"> band application</style></keyword><keyword><style face="normal" font="default"> banded herbicide</style></keyword><keyword><style face="normal" font="default"> banding</style></keyword><keyword><style face="normal" font="default"> canopy</style></keyword><keyword><style face="normal" font="default"> COMMON COCKLEBUR</style></keyword><keyword><style face="normal" font="default"> contamination</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> crops</style></keyword><keyword><style face="normal" font="default"> defoliation</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> Glycine max</style></keyword><keyword><style face="normal" font="default"> glyphosate</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> imazaquin</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> mechanical weed control</style></keyword><keyword><style face="normal" font="default"> mowing</style></keyword><keyword><style face="normal" font="default"> no-till</style></keyword><keyword><style face="normal" font="default"> no-tillage</style></keyword><keyword><style face="normal" font="default"> RATES</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> summer</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> tillage</style></keyword><keyword><style face="normal" font="default"> topping</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> weed control</style></keyword><keyword><style face="normal" font="default"> weed management</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> Zea mays</style></keyword><keyword><style face="normal" font="default"> ZEA-MAYS</style></keyword></keywords><dates><year Day="0" Month="0" Year="2001">2001</year></dates><abstract><style face="normal" font="default">Alternative methods are needed to control weeds in no-till corn and soybean which minimize herbicide contamination of surface or ground water. The objective of this research was to determine whether between-row (BR) mowing + band-applied herbicide could help reduce herbicide use. without sacrificing summer annual weed control or yield, in no-till soybean and field corn. Glyphosate was applied shortly before or at planting to control emerged winter annual weeds in all treatments. In the BR mowing weed management system, the band-applied soil residual herbicides imazaquin + alachlor in soybean or atrazine + alachlor in corn were applied shortly before or after planting followed by two or more between-row mowings to control summer annual weeds. Annual weeds were first mowed when they were about 8 cm tall and again just before crop canopy closure. Between-row mowing weeds very close to the soil surface two or three times killed or suppressed summer annual grass and broadleaf weeds, chiefly giant foxtail, common cocklebur, and horseweed, when timed properly. The BR mowing weed management system increased yield above a weedy check in these no-till crops. It also controlled weeds and yielded as well as or better than broadcast-applied herbicide at the same rates. Use of soil residual herbicides to control summer annual weeds was reduced 50% by banding because only 50% of the field area was sprayed</style></abstract><notes><style face="normal" font="default">JArticleJUL-SEPDiscipline: AGRONOMY; PLANT Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:000175240900029</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0044-116209.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>51</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Fraisse,C.W.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author></authors></contributors><titles><title><style face="normal" font="default">Delineation of site-specific management zones by unsupervised classification of topographic attributes and soil electrical conductivity</style></title><secondary-title><style face="normal" font="default">Transactions of the Asae</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the Asae</style></full-title></periodical><pages end="166" start="155">155-166</pages><volume><style face="normal" font="default">44</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">agricultural engineering</style></keyword><keyword><style face="normal" font="default"> algorithms</style></keyword><keyword><style face="normal" font="default"> ARC/INFO</style></keyword><keyword><style face="normal" font="default"> CLASSIFICATION</style></keyword><keyword><style face="normal" font="default"> COMBINE</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> crops</style></keyword><keyword><style face="normal" font="default"> DEM</style></keyword><keyword><style face="normal" font="default"> electrical conductivity</style></keyword><keyword><style face="normal" font="default"> ELECTRICAL-CONDUCTIVITY</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> fields</style></keyword><keyword><style face="normal" font="default"> GIS</style></keyword><keyword><style face="normal" font="default"> global positioning system</style></keyword><keyword><style face="normal" font="default"> GPS</style></keyword><keyword><style face="normal" font="default"> GRAIN-YIELD</style></keyword><keyword><style face="normal" font="default"> information</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> methodology</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> MOISTURE</style></keyword><keyword><style face="normal" font="default"> precision agriculture</style></keyword><keyword><style face="normal" font="default"> precision farming</style></keyword><keyword><style face="normal" font="default"> principal component analysis</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> sensing</style></keyword><keyword><style face="normal" font="default"> site specific management</style></keyword><keyword><style face="normal" font="default"> site-specific</style></keyword><keyword><style face="normal" font="default"> site-specific management</style></keyword><keyword><style face="normal" font="default"> slope</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil electrical conductivity</style></keyword><keyword><style face="normal" font="default"> STRESS</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> ZONE</style></keyword></keywords><dates><year Day="0" Month="0" Year="2001">2001</year></dates><abstract><style face="normal" font="default">The objective of this research was to determine if unsupervised classification of topographic attributes and soil electrical conductivity could identify management zones for use in precision agriculture, Data collected in two fields located in central Missouri were used to rest the proposed methodology. Principal component analysis was used to determine which layers of data were most important for representing within-field variability Unsupervised clustering algorithms implemented in geographic information system (GIS) software were then used to divide the fields into potential management zones. Grain yield data obtained using a full-size combine equipped with a commercial yield sensing system and global positioning system (GPS) receiver were used to analyze the "goodness" of the potential management zones defined for each field. Principal component analysis of input variables for Field I indicated that elevation and bulk soil electrical conductivity (EC) were more important attributes than slope and Compound Topographic Index (CTI)for defining claypan soil management zones. The optimum number of zones to use when dividing afield ma?; vary from year to year and was mainly a function of weather and the crop planted The number of zones decreased if adequate moisture conditions were present throughout the cropping season (unpredictable) or if crops tolerant to wafer stress were planted (predictable). This classification procedure is fast, can be easily automated in commercially available GIS software, and has considerable advantages when compared to other methods for delineating within-field management zones</style></abstract><notes><style face="normal" font="default">JArticleJAN-FEBDiscipline: AGRICULTURAL ENGINEERING</style></notes><urls><web-urls><url ppv-ref="no">ISI:000169685300021</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0051-101971.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>46</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Fraisse,C.W.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author></authors></contributors><titles><title><style face="normal" font="default">Calibration of the CERES-Maize model for simulating site-specific crop development and yield on claypan soils</style></title><secondary-title><style face="normal" font="default">Applied Engineering in Agriculture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Applied Engineering in Agriculture</style></full-title></periodical><pages end="556" start="547">547-556</pages><volume><style face="normal" font="default">17</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">agricultural engineering</style></keyword><keyword><style face="normal" font="default"> area</style></keyword><keyword><style face="normal" font="default"> calibration</style></keyword><keyword><style face="normal" font="default"> claypan soils</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> crop models</style></keyword><keyword><style face="normal" font="default"> depth</style></keyword><keyword><style face="normal" font="default"> evaluation</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> FLOW</style></keyword><keyword><style face="normal" font="default"> GRAIN-YIELD</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> LANDSCAPE POSITION</style></keyword><keyword><style face="normal" font="default"> leaf area index</style></keyword><keyword><style face="normal" font="default"> leaves</style></keyword><keyword><style face="normal" font="default"> maize</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> models</style></keyword><keyword><style face="normal" font="default"> MOISTURE</style></keyword><keyword><style face="normal" font="default"> monitoring</style></keyword><keyword><style face="normal" font="default"> performance</style></keyword><keyword><style face="normal" font="default"> position</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> simulation models</style></keyword><keyword><style face="normal" font="default"> SIMULATION-MODELS</style></keyword><keyword><style face="normal" font="default"> site-specific</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil moisture</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> STRESS</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword><keyword><style face="normal" font="default"> variation</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> water stress</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> yields</style></keyword><keyword><style face="normal" font="default"> ZONE</style></keyword></keywords><dates><year Day="0" Month="0" Year="2001">2001</year></dates><abstract><style face="normal" font="default">Crop simulation models have historically been used to predict field average crop development and yield under alternative management and weather scenarios. The objective of this research was to calibrate and test a new version of the CERES-Maize model, modified to improve the simulation of site-specific crop development and yield. Seven sites within a field located in central Missouri were selected based on landscape position, elevation, depth to a claypan soil horizon, and past yield history. Detailed monitoring of crop development and soil moisture during the 1997 season provided data for calibration and evaluation of model performance at each site. Mid-season water stress caused a large variation in measured yield with values ranging from 2.6 Mg ha(-1) in the eroded side-slope areas to 10.1 Mg ha(-1) in the deeper soils located in the low areas of the field. The model was calibrated against measured data for root zone soil moisture content, leaf area index, and grain yield. The results demonstrated that modifications included in the model to simulate root growth and development are important in soils with a high-clay restrictive layer such as the claypan soils. Although the model performed well in simulating yield variability, simulated leaf area indices were below measured values at five out of seven monitoring sites, suggesting a need for model improvements. Results showed that accurate simulation of crop growth and development for areas of the study field that receive run-on or subsurface flow contributions from upland areas will require enhancement of the model to account for the effects of these processes</style></abstract><notes><style face="normal" font="default">JArticleJULDiscipline: AGRICULTURAL ENGINEERING</style></notes><urls><web-urls><url ppv-ref="no">ISI:000173052900020</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0046-fraisse.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>52</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Gomez,J.A.</style></author><author><style face="normal" font="default"> Nearing,M.A.</style></author><author><style face="normal" font="default"> Giraldez,J.V.</style></author><author><style face="normal" font="default"> Alberts,E.E.</style></author></authors></contributors><titles><title><style face="normal" font="default">Analysis of sources of variability of runoff volume in a 40 plot experiment using a numerical model</style></title><secondary-title><style face="normal" font="default">Journal of Hydrology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Hydrology</style></full-title></periodical><pages end="197" start="183">183-197</pages><volume><style face="normal" font="default">248</style></volume><number><style face="normal" font="default">1-4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">depth</style></keyword><keyword><style face="normal" font="default"> depth-to-claypan</style></keyword><keyword><style face="normal" font="default"> EROSION</style></keyword><keyword><style face="normal" font="default"> fallow</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> HYDRAULIC CONDUCTIVITY</style></keyword><keyword><style face="normal" font="default"> infiltration</style></keyword><keyword><style face="normal" font="default"> information</style></keyword><keyword><style face="normal" font="default"> measurement</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> models</style></keyword><keyword><style face="normal" font="default"> numerical models</style></keyword><keyword><style face="normal" font="default"> performance</style></keyword><keyword><style face="normal" font="default"> RAINFALL</style></keyword><keyword><style face="normal" font="default"> runoff</style></keyword><keyword><style face="normal" font="default"> SATURATED HYDRAULIC CONDUCTIVITY</style></keyword><keyword><style face="normal" font="default"> SCALE</style></keyword><keyword><style face="normal" font="default"> SEDIMENT</style></keyword><keyword><style face="normal" font="default"> site-specific</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil properties</style></keyword><keyword><style face="normal" font="default"> SOIL-WATER PROPERTIES</style></keyword><keyword><style face="normal" font="default"> spatial distribution</style></keyword><keyword><style face="normal" font="default"> SPATIAL VARIABILITY</style></keyword><keyword><style face="normal" font="default"> storage</style></keyword><keyword><style face="normal" font="default"> SURFACE</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> tillage</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword><keyword><style face="normal" font="default"> variation</style></keyword><keyword><style face="normal" font="default"> volume</style></keyword><keyword><style face="normal" font="default"> water</style></keyword></keywords><dates><year Day="0" Month="0" Year="2001">2001</year></dates><abstract><style face="normal" font="default">Runoff volumes from held plots can be quite variable. but the reasons for this variability are not completely understood. Such variations can be important for understanding the hydrologic system, and for evaluating the effectiveness of infiltration, runoff and sediment models. In this study, we investigated the sources of variability among 40 replications in a previously reported experiment on fallow plots located on a claypan soil in Missouri, USA. A numerical model was calibrated using data from the experiment and from other published data on the variability of soil properties. The results describe qualitatively the trend in the observed relationship between the coefficient of variation (CV) and mean runoff volume per event, as well as the lack of stability in time of the relative differences in runoff volume among plots. Quantitatively, approximately 50% of the observed coefficients of variation among the replicated plots were explained by the spatial variability of K,, surface storage, and the depth to claypan. The remaining 50% may be due to the variability in rainfall among plots, measurement error in runoff, the fact that some published rather than site specific information was used in the analyses, and simplifications introduced in the modeling process. Our results suggested that changes in the relative differences in runoff volumes between plots during the season might be explained by the modification of the spatial distribution of K, and surface storage which occurs during tillage. The introduction of these sources of variability in the model formulation produced a realistic description of the variance of the observed values of runoff volume, as well as a relatively clear delineation between the explained and unexplained variability. The results may also serve as an index of model performance in predicting observed data. (C) 2001 Elsevier Science B.V. All rights reserved</style></abstract><notes><style face="normal" font="default">JArticleJUL 15Discipline: ENGINEERING, CIVIL; GEODiscipline: IENCES, MULTIDIDiscipline: IPLINARY; WATER RESOURCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:000169711200012</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0052-111491.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>53</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Hummel,J.W.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Hollinger,S.E.</style></author></authors></contributors><titles><title><style face="normal" font="default">Soil moisture and organic matter prediction of surface and subsurface soils using an NIR soil sensor</style></title><secondary-title><style face="normal" font="default">Computers and Electronics in Agriculture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Computers and Electronics in Agriculture</style></full-title></periodical><pages end="165" start="149">149-165</pages><volume><style face="normal" font="default">32</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">applications</style></keyword><keyword><style face="normal" font="default"> area</style></keyword><keyword><style face="normal" font="default"> DENSITY</style></keyword><keyword><style face="normal" font="default"> depth</style></keyword><keyword><style face="normal" font="default"> errors</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> MOISTURE</style></keyword><keyword><style face="normal" font="default"> near infrared</style></keyword><keyword><style face="normal" font="default"> near-infrared</style></keyword><keyword><style face="normal" font="default"> optics</style></keyword><keyword><style face="normal" font="default"> organic matter</style></keyword><keyword><style face="normal" font="default"> ORGANIC-MATTER</style></keyword><keyword><style face="normal" font="default"> prediction</style></keyword><keyword><style face="normal" font="default"> reflectance</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> sensor</style></keyword><keyword><style face="normal" font="default"> sensors</style></keyword><keyword><style face="normal" font="default"> site specific management</style></keyword><keyword><style face="normal" font="default"> site-specific</style></keyword><keyword><style face="normal" font="default"> site-specific management</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil moisture</style></keyword><keyword><style face="normal" font="default"> soil organic matter</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> SPATIAL VARIABILITY</style></keyword><keyword><style face="normal" font="default"> spectral</style></keyword><keyword><style face="normal" font="default"> spectrophotometry</style></keyword><keyword><style face="normal" font="default"> SURFACE</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword></keywords><dates><year Day="0" Month="0" Year="2001">2001</year></dates><abstract><style face="normal" font="default">Sensors are needed to document the spatial variability of soil parameters for successful implementation of Site-Specific Management (SSM). This paper reports research conducted to document the ability of a previously developed near infrared (NIR) reflectance sensor to predict soil organic matter and soil moisture contents of surface and subsurface soils. Three soil cores (5.56 cm dia. x 1.5 m long) were collected at each of 16 sites across a 144 000 km(2) area of the US Cornbelt. Cores were subsampled at eight depth increments, and wetted to six soil moisture levels ranging from air-dry to saturated. Spectral reflectance data (1603-2598 nm) were obtained in the laboratory on undisturbed soil samples. Data were collected on a 6.6 nm spacing with each reflectance value having a 45 nm bandpass. The data were normalized, transformed to optical density [OD, defined as log,, (1/normalized reflectance)l, and analyzed using stepwise multiple linear regression. Standard errors of prediction for organic matter and soil moisture were 0.62 and 5.31%, respectively. NIR soil moisture prediction can be more easily commercialized than can soil organic matter prediction, since a reduced number of wavelength bands are required (four versus nine, respectively). (C) 2001 Elsevier Science B.V. All rights reserved</style></abstract><notes><style face="normal" font="default">JArticleAUGDiscipline: AGRICULTURE, MULTIDIDiscipline: IPLINARY; COMPUTER Discipline: IENCE, INTERDIDiscipline: IPLINARY APPLICATIONS</style></notes><urls><web-urls><url ppv-ref="no">ISI:000169810200005</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0053-119036.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>54</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kremer,R.J.</style></author><author><style face="normal" font="default"> Souissi,T.</style></author></authors></contributors><titles><title><style face="normal" font="default">Cyanide production by rhizobacteria and potential for suppression of weed seedling growth</style></title><secondary-title><style face="normal" font="default">Current Microbiology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Current Microbiology</style></full-title></periodical><pages end="186" start="182">182-186</pages><volume><style face="normal" font="default">43</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">BACTERIA</style></keyword><keyword><style face="normal" font="default"> DELETERIOUS RHIZOBACTERIA</style></keyword><keyword><style face="normal" font="default"> ETHYLENE BIOSYNTHESIS</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> metabolites</style></keyword><keyword><style face="normal" font="default"> PATHOGENS</style></keyword><keyword><style face="normal" font="default"> PLANTS</style></keyword><keyword><style face="normal" font="default"> pseudomonads</style></keyword><keyword><style face="normal" font="default"> REAGENTS</style></keyword><keyword><style face="normal" font="default"> RHIZOBACTERIA</style></keyword><keyword><style face="normal" font="default"> rhizosphere</style></keyword><keyword><style face="normal" font="default"> SEEDLINGS</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword></keywords><dates><year Day="0" Month="0" Year="2001">2001</year></dates><abstract><style face="normal" font="default">Rhizobacteria strains were characterized for ability to synthesize hydrogen cyanide and for effects on seedling root growth of various plants. Approximately 32% of bacteria from a collection of over 2000 isolates were cyanogenic, evolving HCN from trace concentrations to >30 nmoles/mg cellular protein. Cyanogenesis was predominantly associated with pseudomonads and was enhanced when glycine was provided in the culture medium. Concentrations of HCN produced by rhizobacteria were similar to exogenous concentrations inhibiting seedling growth in bioassays, suggesting that cyanogenesis by rhizobacteria in the rhizosphere can adversely affect plant growth. Growth inhibition of lettuce and barnyardgrass by volatile metabolites of the cyanogenic rhizobacteria confirmed that HCN was the major inhibitory compound produced. Our results suggest that HCN produced in the rhizospheres of seedlings by selected rhizobacteria is a potential and environmentally compatible mechanism for biological control of weeds</style></abstract><notes><style face="normal" font="default">JArticleSEPDiscipline: MICROBIOLOGY</style></notes><urls><web-urls><url ppv-ref="no">ISI:000169543900007</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0054-118437.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>49</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lerch,R.N.</style></author><author><style face="normal" font="default"> Li,Y.X.</style></author></authors></contributors><titles><title><style face="normal" font="default">Analysis of hydroxylated atrazine degradation products in soils</style></title><secondary-title><style face="normal" font="default">International Journal of Environmental Analytical Chemistry</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">International Journal of Environmental Analytical Chemistry</style></full-title></periodical><pages end="183" start="167">167-183</pages><volume><style face="normal" font="default">79</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">ADSORPTION</style></keyword><keyword><style face="normal" font="default"> atrazine</style></keyword><keyword><style face="normal" font="default"> atrazine degradation products</style></keyword><keyword><style face="normal" font="default"> atrazine metabolites</style></keyword><keyword><style face="normal" font="default"> BOUND RESIDUE</style></keyword><keyword><style face="normal" font="default"> DEETHYLATRAZINE</style></keyword><keyword><style face="normal" font="default"> deethylhydroxyatrazine</style></keyword><keyword><style face="normal" font="default"> degradation</style></keyword><keyword><style face="normal" font="default"> DEGRADATION-PRODUCTS</style></keyword><keyword><style face="normal" font="default"> deisopropylhydroxyatrazine</style></keyword><keyword><style face="normal" font="default"> determination</style></keyword><keyword><style face="normal" font="default"> DISAPPEARANCE</style></keyword><keyword><style face="normal" font="default"> extraction</style></keyword><keyword><style face="normal" font="default"> HYDROXYATRAZINE</style></keyword><keyword><style face="normal" font="default"> LC/MS/MS</style></keyword><keyword><style face="normal" font="default"> LC/UV</style></keyword><keyword><style face="normal" font="default"> LIQUID-CHROMATOGRAPHY</style></keyword><keyword><style face="normal" font="default"> metabolites</style></keyword><keyword><style face="normal" font="default"> methodology</style></keyword><keyword><style face="normal" font="default"> metolachlor</style></keyword><keyword><style face="normal" font="default"> Midwestern United States</style></keyword><keyword><style face="normal" font="default"> RESIDUES</style></keyword><keyword><style face="normal" font="default"> RESOLUTION MASS-SPECTROMETRY</style></keyword><keyword><style face="normal" font="default"> S-TRIAZINES</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> SOLID-PHASE EXTRACTION</style></keyword><keyword><style face="normal" font="default"> sorption</style></keyword><keyword><style face="normal" font="default"> STATES</style></keyword><keyword><style face="normal" font="default"> surface water</style></keyword><keyword><style face="normal" font="default"> SURFACE WATERS</style></keyword><keyword><style face="normal" font="default"> United States</style></keyword><keyword><style face="normal" font="default"> water</style></keyword></keywords><dates><year Day="0" Month="0" Year="2001">2001</year></dates><abstract><style face="normal" font="default">Hydroxylated atrazine degradation products (HADPs) have been shown to persist in soils and contaminate surface waters throughout the Midwestern United States, yet expedient analytical methods for their determination in soils are lacking. The developed method employs a mixed-mode extractant [3:1 0.5M KH2PO4, pH 7.5:CH3CN, v/v] designed to disrupt the two primary mechanisms of HADP sorption to soils: cation exchange and hydrophobic interactions. Strong anion exchange solid-phase extraction (SPE) is used for sample clean-up followed by isolation and concentration using strong cation exchange SPE. HADPs were quantitated by LC/MS/MS and LC/UV. Method recoveries were determined by spiking C-14-HADPs into three soils with lengthy atrazine use histories. Recoveries ranged from 74-81% for C-14-hydroxyatrazine (HA), 79-88% for C-14-deethylhydroxyatrazine (DEHA), and 64-77% for C-14-deisopropylhydroxyatrazine (DIHA). HADP soil concentrations ranged from 66.9-178 mug kg(-1) for HA, 8.99-40.9 mug kg(-1) for DEHA, and 5.27-16.2 mug kg(-1) for DIHA. Utilization of the mixed-mode procedure, in conjunction with existing methodologies for analysis of atrazine and its chlorinated metabolites, enables a more complete and accurate quantitation of all the major stable atrazine residues in soils. HADPs comprised an average of 91% of the total atrazine residues in three agricultural surface soils, with HA the major constituent present in all soils. These data indicate that repeated atrazine use results in HADPs as the predominant atrazine residues in surface soils</style></abstract><notes><style face="normal" font="default">JArticleDiscipline: CHEMISTRY, ANALYTICAL; ENVIRONMENTAL Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:000170583000001</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0049-109238.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>50</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Runes,H.B.</style></author><author><style face="normal" font="default"> Bottomley,P.J.</style></author><author><style face="normal" font="default"> Lerch,R.N.</style></author><author><style face="normal" font="default"> Jenkins,J.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Atrazine remediation in wetland microcosms</style></title><secondary-title><style face="normal" font="default">Environmental Toxicology and Chemistry</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Environmental Toxicology and Chemistry</style></full-title></periodical><pages end="1066" start="1059">1059-1066</pages><volume><style face="normal" font="default">20</style></volume><number><style face="normal" font="default">5</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">atrazine</style></keyword><keyword><style face="normal" font="default"> DEETHYLATRAZINE</style></keyword><keyword><style face="normal" font="default"> degradation</style></keyword><keyword><style face="normal" font="default"> DEGRADATION PRODUCTS</style></keyword><keyword><style face="normal" font="default"> DEISOPROPYLATRAZINE</style></keyword><keyword><style face="normal" font="default"> HYDROXYATRAZINE</style></keyword><keyword><style face="normal" font="default"> irrigation</style></keyword><keyword><style face="normal" font="default"> metabolites</style></keyword><keyword><style face="normal" font="default"> RESIDUES</style></keyword><keyword><style face="normal" font="default"> rhizosphere</style></keyword><keyword><style face="normal" font="default"> runoff</style></keyword><keyword><style face="normal" font="default"> SEDIMENT</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> sorption</style></keyword><keyword><style face="normal" font="default"> SURFACE-WATER</style></keyword><keyword><style face="normal" font="default"> transport</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> wetland</style></keyword></keywords><dates><year Day="0" Month="0" Year="2001">2001</year></dates><abstract><style face="normal" font="default">Laboratory wetland microcosms were used to study treatment of atrazine, in irrigation runoff by a field-scale-constructed wetland under controlled conditions. Three experiments, in which 1 ppm atrazine was added to the water column of three wetland, one soil control, and one water control microcosm, were conducted. Atrazine dissipation from the water column and degradate formation (deethylatrazine [DEA]; deisopropylatrazine [DIA]; and hydroxyatrazine [HA]) were monitored. Atrazine dissipation from the water column of wetland microcosms was biphasic. Less than 12% of the atrazine applied to wetland microcosms remained in the water column on day 56. Atrazine degradates were observed in water and sediment, with HA the predominant degradate. Analysis of day 56 sediment samples indicated that a significant portion of the initial application was detected as the parent compound and HA. Most probable number (MPN) assays demonstrated that atrazine degrader populations were small in wetland sediment. Wetland microcosms were able to reduce atrazine concentration in the water column via sorption and degradation. Based on results from this study, it is hypothesized that plant uptake contributed to atrazine dissipation from the water column</style></abstract><notes><style face="normal" font="default">JArticleMAYDiscipline: ENVIRONMENTAL Discipline: IENCES; TOXICOLOGY</style></notes><urls><web-urls><url ppv-ref="no">ISI:000170165800017</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0050-113803.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>47</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Stecker,J.A.</style></author><author><style face="normal" font="default"> Brown,J.R.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author></authors></contributors><titles><title><style face="normal" font="default">Residual phosphorus distribution and sorption in starter fertilizer bands applied in no-till culture</style></title><secondary-title><style face="normal" font="default">Soil Science Society of America Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil Science Society of America Journal</style></full-title></periodical><pages end="1183" start="1173">1173-1183</pages><volume><style face="normal" font="default">65</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">ADSORPTION</style></keyword><keyword><style face="normal" font="default"> area</style></keyword><keyword><style face="normal" font="default"> band application</style></keyword><keyword><style face="normal" font="default"> banding</style></keyword><keyword><style face="normal" font="default"> CLAY</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> fertilizer</style></keyword><keyword><style face="normal" font="default"> fields</style></keyword><keyword><style face="normal" font="default"> LOAM</style></keyword><keyword><style face="normal" font="default"> no-till</style></keyword><keyword><style face="normal" font="default"> PHOSPHATE</style></keyword><keyword><style face="normal" font="default"> phosphorus</style></keyword><keyword><style face="normal" font="default"> placement</style></keyword><keyword><style face="normal" font="default"> sampling</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> sorption</style></keyword><keyword><style face="normal" font="default"> spatial distribution</style></keyword><keyword><style face="normal" font="default"> WHEAT</style></keyword><keyword><style face="normal" font="default"> Zea mays</style></keyword><keyword><style face="normal" font="default"> ZEA-MAYS</style></keyword></keywords><dates><year Day="0" Month="0" Year="2001">2001</year></dates><abstract><style face="normal" font="default">Banding fertilizer P in no-till culture results in a heterogeneous soil P distribution for months to years. This study's objective was to quantify the spatial distribution and temporal dynamics of banded P to improve assessment of soil P availability. In three trials for no-till corn (Zea mays L.) and from four replicated plots each, we collected a grid of 1.3 by 1.3 cm samples around 10 and 20 kg P ha(-1) starter fertilizer bands at similar to6, 12, and 18 mo after application. Soils were Mexico silty clay loam (Mollic Epiaqualf), Putnam silty clay loam (Vertic Albaqualf), and Dockery silt loam (Aquic Udifluvent). Band affected soil was defined as having a Bray-1 P concentration of at least 1.5 times that of adjacent soil. Band dimensions varied from 5 to 8 cm (horizontal) and 5 to 12 cm (vertical), and tended to be largest at the 12-mo sampling. Cross-sectional area of bands ranged from 18 to 63 cm(2). Band P concentrations decreased logarithmically from the band center, and were largest at either 6 or 12 mo, and varied substantially along the direction of band application. Band P concentrations ranged from 100 to 313 mg P kg(-1) at 6 mo, 56 to 415 mg P kg(-1) at 12 mo, and 63 to 237 mg P kg(-1) at 18 mo (avg. of the six most concentrated samples of the 20 kg P ha(-1) bands). Soil in the band center was weakly buffered and appeared to be more easily extracted by the Bray-1 extractant than nonband affected soil. Inclusion of bands in soil samples would increase the risk to overestimate available P to a crop</style></abstract><notes><style face="normal" font="default">JArticleJUL-AUGDiscipline: AGRICULTURE, SOIL Discipline: IENCE</style></notes><urls><web-urls><url ppv-ref="no">ISI:000172918400019</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0047-117738.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>55</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Sudduth,K.A.</style></author><author><style face="normal" font="default"> Drummond,S.T.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author></authors></contributors><titles><title><style face="normal" font="default">Accuracy issues in electromagnetic induction sensing of soil electrical conductivity for precision agriculture</style></title><secondary-title><style face="normal" font="default">Computers and Electronics in Agriculture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Computers and Electronics in Agriculture</style></full-title></periodical><pages end="264" start="239">239-264</pages><volume><style face="normal" font="default">31</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">accuracy</style></keyword><keyword><style face="normal" font="default"> applications</style></keyword><keyword><style face="normal" font="default"> calibration</style></keyword><keyword><style face="normal" font="default"> CLASSIFICATION</style></keyword><keyword><style face="normal" font="default"> CLAY</style></keyword><keyword><style face="normal" font="default"> claypan soils</style></keyword><keyword><style face="normal" font="default"> data acquisition</style></keyword><keyword><style face="normal" font="default"> data collection</style></keyword><keyword><style face="normal" font="default"> depth</style></keyword><keyword><style face="normal" font="default"> electrical conductivity</style></keyword><keyword><style face="normal" font="default"> ELECTRICAL-CONDUCTIVITY</style></keyword><keyword><style face="normal" font="default"> electromagnetic induction</style></keyword><keyword><style face="normal" font="default"> EM38</style></keyword><keyword><style face="normal" font="default"> equations</style></keyword><keyword><style face="normal" font="default"> estimation</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> GPS</style></keyword><keyword><style face="normal" font="default"> maps</style></keyword><keyword><style face="normal" font="default"> measurement</style></keyword><keyword><style face="normal" font="default"> MOISTURE</style></keyword><keyword><style face="normal" font="default"> MULTIPLE LINEAR-REGRESSION</style></keyword><keyword><style face="normal" font="default"> precision agriculture</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> SALINITY</style></keyword><keyword><style face="normal" font="default"> sensing</style></keyword><keyword><style face="normal" font="default"> sensor</style></keyword><keyword><style face="normal" font="default"> sensors</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil electrical conductivity</style></keyword><keyword><style face="normal" font="default"> soil moisture</style></keyword><keyword><style face="normal" font="default"> soil properties</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> SPATIAL PREDICTION</style></keyword><keyword><style face="normal" font="default"> SPATIAL VARIABILITY</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> temperature</style></keyword><keyword><style face="normal" font="default"> TESTS</style></keyword><keyword><style face="normal" font="default"> topsoil</style></keyword><keyword><style face="normal" font="default"> topsoil depth</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword><keyword><style face="normal" font="default"> variation</style></keyword><keyword><style face="normal" font="default"> WATER-CONTENT</style></keyword></keywords><dates><year Day="0" Month="0" Year="2001">2001</year></dates><abstract><style face="normal" font="default">Soil apparent electrical conductivity (EC,) has been used as a surrogate measure for such soil properties as salinity, moisture content, topsoil depth (TD), and clay content. Measurements of ECa can be accomplished with commercially available sensors and can be used to efficiently and inexpensively develop the dense datasets desirable for describing within-field spatial variability in precision agriculture. The objective of this research was to investigate accuracy issues in the collection of soil ECa data. A mobile data acquisition system for ECa was developed using the Geonics EM38 (1) sensor. The sensor was mounted on a wooden cart pulled behind an all-terrain vehicle, which also carried a GPS receiver and data collection computer. Tests showed that drift of the EM38 could be a significant fraction of within-field ECa variation. Use of a calibration transect to document and adjust for this drift was recommended. A procedure was described and tested to evaluate positional offset of the mobile EM38 data. Positional offset was due to both the distance from the sensor to the GPS antenna and the data acquisition system time lags. Sensitivity of ECa to variations in sensor operating speed and height was relatively minor. Procedures were developed to estimate TD on claypan soils from ECa measurements. Linear equations of an inverse or power function transformation of ECa provided the best estimates of TD. Collection of individual calibration datasets within each surveyed field was necessary for best results. Multiple measurements of ECa on a field were similar if they were obtained at the same time of the year. Whole-field maps of ECa-determined TD from multiple surveys were similar but not identical. There was a significant effect of soil moisture and temperature differences across measurement dates. Classification of measurement dates as hot vs. cold and wet vs, dry provided TD estimations nearly as accurate as when individual point soil moisture and temperature data were included in the calibration equation. (C) 2001 Elsevier Science B.V. All rights reserved</style></abstract><notes><style face="normal" font="default">JArticleMAYSp. Iss. SIDiscipline: AGRICULTURE, MULTIDIDiscipline: IPLINARY; COMPUTER Discipline: IENCE, INTERDIDiscipline: IPLINARY APPLICATIONS</style></notes><urls><web-urls><url ppv-ref="no">ISI:000168064500003</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0055-105288.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>64</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Allen,J.R.</style></author><author><style face="normal" font="default"> Johnson,W.G.</style></author><author><style face="normal" font="default"> Smeda,R.J.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">ALS-resistant Helianthus annuus interference in Glycine max</style></title><secondary-title><style face="normal" font="default">Weed Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Science</style></full-title></periodical><pages end="466" start="461">461-466</pages><volume><style face="normal" font="default">48</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">biomass</style></keyword><keyword><style face="normal" font="default"> canopy</style></keyword><keyword><style face="normal" font="default"> carrying capacity</style></keyword><keyword><style face="normal" font="default"> critical weed-free period</style></keyword><keyword><style face="normal" font="default"> DENSITY</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> Glycine max</style></keyword><keyword><style face="normal" font="default"> Glycine max (L.) Merr 'Asgrow 3601',soybean</style></keyword><keyword><style face="normal" font="default"> GLYCINE-MAX</style></keyword><keyword><style face="normal" font="default"> glyphosate</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> Helianthus annuus L.HELAN,common sunflower</style></keyword><keyword><style face="normal" font="default"> INTERFERENCE</style></keyword><keyword><style face="normal" font="default"> losses</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> PLANTS</style></keyword><keyword><style face="normal" font="default"> removal</style></keyword><keyword><style face="normal" font="default"> weed competition</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> yield losses</style></keyword><keyword><style face="normal" font="default"> yields</style></keyword></keywords><dates><year Day="0" Month="0" Year="2000">2000</year></dates><abstract><style face="normal" font="default">Field studies were conducted to determine the effect of early-season and early- plus late-season acetolactate synthase-resistant Helianthus annuus interference on Glycine max and H. annuus growth and yield at two sites in Missouri. Helianthus annuus densities of 3 plants m(-2) were established shortly after G, max emergence in all plots except the weed-free check. To study early-season interference, H. annuus were removed with postemergence glyphosate (0.84 kg ae ha(-1)) 2, 4, 6, and 8 wk after planting (WAP) and kept weed-free for the rest of the growing season. Glycine max yields were not different with 2, 4, 6, or 8 wk of early-season interference at either location. To study early- plus late-season interference, H. annuus densities were established at 3 plants m(-2) They were then removed 2, 4, 6, or 8 WAP with glyphosate and subsequently reestablished at the same density within 2 wk after removal by newly emerging and transplanted H. annuus. These H, annuus were allowed to remain in the field for the remainder of the growing season. This provided a weed-free period of approximately 2 wk during the growing season beginning 2, 4, 6, or 8 WAP. Season-long interference and no-interference treatments were also included. Glycine max yields were reduced 47 to 72% with season-long interference. Helianthus annuus vegetative dry matter was approximately 56% lower at Columbia than at Miami. Glycine max yields tended to increase as the weed-free period was delayed into the growing season. Early-season weed-free periods (2 to 4 and 4 to 6 WAP) allowed H. annuus to become re-established before G. max formed a canopy and resulted in larger amounts of H. annuus biomass and seed production as well as G. max yield losses of 15 to 80%. Re-establishment of H. annuus in 6 to 8 WAP and 8 to 10 WAP weed-free treatments generally resulted in the planes surviving for only a few weeks after establishment and not producing seed or reducing G. max yield</style></abstract><notes><style face="normal" font="default">JArticleJUL-AUGDiscipline: AGRONOMY; PLANT Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:000088629700010</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0064-109741.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>63</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Blanchard,P.E.</style></author><author><style face="normal" font="default"> Lerch,R.N.</style></author></authors></contributors><titles><title><style face="normal" font="default">Watershed vulnerability to losses of agricultural chemicals: Interactions of chemistry, hydrology, and land-use</style></title><secondary-title><style face="normal" font="default">Environmental Science &amp; Technology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Environmental Science &amp; Technology</style></full-title></periodical><pages end="3322" start="3315">3315-3322</pages><volume><style face="normal" font="default">34</style></volume><number><style face="normal" font="default">16</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">area</style></keyword><keyword><style face="normal" font="default"> atrazine</style></keyword><keyword><style face="normal" font="default"> atrazine degradation products</style></keyword><keyword><style face="normal" font="default"> BASIN</style></keyword><keyword><style face="normal" font="default"> contamination</style></keyword><keyword><style face="normal" font="default"> groundwater</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> hydrology</style></keyword><keyword><style face="normal" font="default"> land use</style></keyword><keyword><style face="normal" font="default"> leaching</style></keyword><keyword><style face="normal" font="default"> losses</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> MISSISSIPPI RIVER</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> NITRATE</style></keyword><keyword><style face="normal" font="default"> NORTH-CENTRAL MISSOURI</style></keyword><keyword><style face="normal" font="default"> nutrients</style></keyword><keyword><style face="normal" font="default"> pesticides</style></keyword><keyword><style face="normal" font="default"> QUALITY</style></keyword><keyword><style face="normal" font="default"> RIVERS</style></keyword><keyword><style face="normal" font="default"> row cropping intensity</style></keyword><keyword><style face="normal" font="default"> runoff</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> streams</style></keyword><keyword><style face="normal" font="default"> SURFACE WATERS</style></keyword><keyword><style face="normal" font="default"> transport</style></keyword><keyword><style face="normal" font="default"> TRIBUTARIES</style></keyword><keyword><style face="normal" font="default"> variation</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> water quality</style></keyword><keyword><style face="normal" font="default"> WATER-QUALITY</style></keyword><keyword><style face="normal" font="default"> watershed</style></keyword><keyword><style face="normal" font="default"> watersheds</style></keyword></keywords><dates><year Day="0" Month="0" Year="2000">2000</year></dates><abstract><style face="normal" font="default">The objective of this study was to conduct a multibasin reconnaissance survey to determine the relative importance of chemical properties, land-use, and hydrology to agricultural chemical contamination of streams in northern Missouri. In 1994 and 1995, samples were collected from 140 sites on 95 different streams and rivers throughout northern Missouri. Samples were collected under preplant and postplant conditions and analyzed for common herbicides and dissolved nutrients. Atrazine, the most frequently detected herbicide was detected in all postplant samples and 99% and 99% of the preplant samples in 1994 and 1995, respectively. The study area has significant variations in soils, hydrology, and land-use (row-cropping intensity). The hydrology is largely determined by the soils, as reflected by soil hydrologic groups. Nitrate and herbicide concentrations showed opposite trends across the study region. Streams draining watersheds with runoff-prone soils had the highest herbicide concentrations, while streams draining watersheds with more groundwater recharge had low herbicide concentrations but the highest NO3-N concentrations. Current data are sufficient to develop a conceptual framework for assessing watershed vulnerability based on three key factors. The primary factor is the chemistry of the compound, which determines the potential hydrologic transport pathways for that chemical to be lost from the soil. Nitrate can potentially be leached or lost in runoff. Moderately sorbed compounds, such as atrazine, are more likely to be lost in runoff or degraded within the soil than leached. The hydrology of a region is the secondary factor, as it determines the relative importance of the leaching and runoff transport pathways. The third factor then is the land-use, which includes the percentage of a watershed that is cropped, the locations within the watershed that are cropped, and the chemicals applied. Management practices to improve water quality must be designed in accordance with the dominant problems and transport pathways of a watershed</style></abstract><notes><style face="normal" font="default">JArticleAUG 15Discipline: ENGINEERING, ENVIRONMENTAL; ENVIRONMENTAL Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:000088751000002</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0063-103541.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>58</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Timing and frequency of between-row mowing and band-applied herbicide for annual weed control in soybean</style></title><secondary-title><style face="normal" font="default">Agronomy Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Agronomy Journal</style></full-title></periodical><pages end="1019" start="1013">1013-1019</pages><volume><style face="normal" font="default">92</style></volume><number><style face="normal" font="default">5</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">area</style></keyword><keyword><style face="normal" font="default"> banding</style></keyword><keyword><style face="normal" font="default"> canopy</style></keyword><keyword><style face="normal" font="default"> COCKLEBUR XANTHIUM-STRUMARIUM</style></keyword><keyword><style face="normal" font="default"> competition</style></keyword><keyword><style face="normal" font="default"> contamination</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> crops</style></keyword><keyword><style face="normal" font="default"> EROSION</style></keyword><keyword><style face="normal" font="default"> EUTROPHICATION</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> frequency</style></keyword><keyword><style face="normal" font="default"> GLYCINE-MAX</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> Indiana</style></keyword><keyword><style face="normal" font="default"> INTERFERENCE</style></keyword><keyword><style face="normal" font="default"> losses</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> mowing</style></keyword><keyword><style face="normal" font="default"> runoff</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> species</style></keyword><keyword><style face="normal" font="default"> SURFACE</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> timing</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> weed control</style></keyword><keyword><style face="normal" font="default"> weed management</style></keyword><keyword><style face="normal" font="default"> WEEDS</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> yield losses</style></keyword></keywords><dates><year Day="0" Month="0" Year="2000">2000</year></dates><abstract><style face="normal" font="default">Alternative ways are needed to control weeds in field crops that reduce or prevent both herbicide contamination of surface and ground water and soil erosion. A new weed management system, which consisted of band-applied herbicides over the soybean [Glycine max (L.) Merr., 'Morsoy 9137'] row and two or more between-row (BR) mowings, was optimized in a soybean field near Columbia, MO. Between-row mowing very close to the soil surface twice with a mower killed or suppressed annual grass and broadleaf weeds, chiefly giant foxtail (Setaria faberi R. Herrm.), common ragweed (Ambrosia artemisiifolia L.), and waterhemp species (Amaranthus spp.), when properly timed. When band-applied herbicide controlled weeds within the crop row, annual weeds between rows could be mowed once when the tallest weeds were 8 to 24 cm tall and again just before crop canopy closure, without yield loss. No more than two BR mowings were needed to control annual weeds. Shading by crop canopy closure contributed to weed suppression in this BR-mowing weed management system. Soybean yield in the BR-mowing weed management system could not be statistically distinguished from heed, weed-free check plots or broadcast-herbicide treatments and was greater than the weedy check plots. Herbicide use was reduced 50% by banding because only 50% of the field area was sprayed. The BR-mowing weed management system may have use in environmentally sensitive areas to help reduce soil erosion and/or water contamination by herbicides</style></abstract><notes><style face="normal" font="default">JArticleSEP-OCTDiscipline: AGRONOMY</style></notes><urls><web-urls><url ppv-ref="no">ISI:000165307500031</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0058-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>65</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Between-row mowing plus in-row band-applied herbicide for weed control in Glycine max</style></title><secondary-title><style face="normal" font="default">Weed Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Science</style></full-title></periodical><pages end="500" start="487">487-500</pages><volume><style face="normal" font="default">48</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">Amaranthus spp.,waterhemp spp.</style></keyword><keyword><style face="normal" font="default"> area</style></keyword><keyword><style face="normal" font="default"> band application</style></keyword><keyword><style face="normal" font="default"> banding</style></keyword><keyword><style face="normal" font="default"> canopy</style></keyword><keyword><style face="normal" font="default"> COCKLEBUR XANTHIUM-STRUMARIUM</style></keyword><keyword><style face="normal" font="default"> common ragweed,Ambrosia artemisiifolia L.AMBEL</style></keyword><keyword><style face="normal" font="default"> competition</style></keyword><keyword><style face="normal" font="default"> contamination</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> crops</style></keyword><keyword><style face="normal" font="default"> cutting</style></keyword><keyword><style face="normal" font="default"> defoliation</style></keyword><keyword><style face="normal" font="default"> EROSION</style></keyword><keyword><style face="normal" font="default"> EUTROPHICATION</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> giant foxtail,Setaria faberi Herrm.SETFA</style></keyword><keyword><style face="normal" font="default"> Glycine max</style></keyword><keyword><style face="normal" font="default"> GLYCINE-MAX</style></keyword><keyword><style face="normal" font="default"> groundwater</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> Indiana</style></keyword><keyword><style face="normal" font="default"> INTERFERENCE</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> mowing</style></keyword><keyword><style face="normal" font="default"> nonchemical weed control</style></keyword><keyword><style face="normal" font="default"> reduced herbicide rate</style></keyword><keyword><style face="normal" font="default"> runoff</style></keyword><keyword><style face="normal" font="default"> SEED</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soybean,Glycine max (L.) Merr.'Morsoy 9137' and 'Pioneer 9381'</style></keyword><keyword><style face="normal" font="default"> soybeans</style></keyword><keyword><style face="normal" font="default"> SURFACE</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> trimming</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> weed control</style></keyword><keyword><style face="normal" font="default"> weed management</style></keyword><keyword><style face="normal" font="default"> WEEDS</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> yields</style></keyword></keywords><dates><year Day="0" Month="0" Year="2000">2000</year></dates><abstract><style face="normal" font="default">Most farmers now rely on herbicides and, to a lesser extent, cultivation to control weeds in Glycine max in the Midwest. However, the general public is concerned that widely used herbicides will contaminate surface and groundwater. Alternative ways to control weeds in field crops are needed to reduce or prevent herbicide contamination of surface and groundwater. A new between-row-mowing weed management system that consists of band-applied herbicides over crop rows + two or more between-row mowings was rested in G. max over 6 yr in Missouri. Mowing weeds close to the soil surface two or more rimes between crop rows killed or suppressed annual grass and broadleaf weeds, chiefly Setaria faberi, Ambrosia artemisiifolia, and Amaranthus spp., if properly timed. Shading by crop canopy closure contributed to weed suppression in this weed management system. G. max yield also could not be distinguished from weed-free check plots and was greater than the weedy check plots. Herbicide use was reduced 50% by banding because only 50% of the field area was sprayed. The between-row-mowing weed management system may have use in environmentally sensitive areas to help reduce soil erosion or water contamination by herbicides</style></abstract><notes><style face="normal" font="default">JArticleJUL-AUGDiscipline: AGRONOMY; PLANT Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:000088629700014</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0065-104946.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>68</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">A degree-day model of Cirsium arvense shoot emergence from adventitious root buds in spring</style></title><secondary-title><style face="normal" font="default">Weed Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Science</style></full-title></periodical><pages end="341" start="333">333-341</pages><volume><style face="normal" font="default">48</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">CANADA</style></keyword><keyword><style face="normal" font="default"> Canada thistle</style></keyword><keyword><style face="normal" font="default"> CIRAR</style></keyword><keyword><style face="normal" font="default"> Cirsium arvense (L.) Scop.CIRAR</style></keyword><keyword><style face="normal" font="default"> CONSERVATION-TILLAGE</style></keyword><keyword><style face="normal" font="default"> fallow</style></keyword><keyword><style face="normal" font="default"> GROWING DEGREE-DAYS</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> HALEPENSE L PERS</style></keyword><keyword><style face="normal" font="default"> heat sum</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> models</style></keyword><keyword><style face="normal" font="default"> monitoring</style></keyword><keyword><style face="normal" font="default"> no-till</style></keyword><keyword><style face="normal" font="default"> POPULATIONS</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> spring</style></keyword><keyword><style face="normal" font="default"> SYSTEMS</style></keyword><keyword><style face="normal" font="default"> temperature</style></keyword><keyword><style face="normal" font="default"> TIME</style></keyword><keyword><style face="normal" font="default"> Triticum aestivum</style></keyword><keyword><style face="normal" font="default"> Triticum aestivum L.wheat</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> weed management</style></keyword></keywords><dates><year Day="0" Month="0" Year="2000">2000</year></dates><abstract><style face="normal" font="default">If decision-aid software models of weed emergence and growth are ever to help producers better time weed management, these models must be able to predict perennial weed shoot emergence from vegetative propagules. In this research, Cirsium arvense shoot emergence from adventitious root buds in spring was modeled using degree-day heat sums. Fractional C. arvense shoot emergence was best modeled as a logistic dose-response function of degree-day heat sum as follows: Y = 1.108/(1 + [X/ 488.344](-5.161)) where Y = fractional C. arvense shoot emergence (0 to 1) and X = heat sum in degree-days above 0 C after day 91 of the year (April 1) with an upper limit of 800 degree (C) days (r(2) = 0.83). This empirical model was validated by graphing observed vs. model-predicted C. arvense shoot emergence using two independently gathered data sea, one of C. arvense emergence in autumn chisel-plowed Triticum aestivum (r(2) = 0.82) and the other in no-till fallow (r(2) = 0.63). The model slightly overestimated emergence at low fractional emergence (&lt; similar to 7% at 0.1 fractional emergence) and underestimated emergence at high fractional emergence (10 to 20% at 0.8 to 1.0 fractional emergence). Below an emergence fraction of 0.8, the model adequately estimated observed emergence to within about 10% of the predicted regression line. Using the model, about 1% and 80% of C. arvense shoots should emerge from adventitious root buds after a heat sum accumulates of about 197 and 587 C d, respectively, starting from day 91 of the year. Consequently, farmers should begin monitoring C. arvense patches for emergence and height growth after about 197 C d accumulate and expect to control C. arvense before about 587 C d accumulate, which is when about 80% of shoots have emerged</style></abstract><notes><style face="normal" font="default">JArticleMAY-JUNDiscipline: AGRONOMY; PLANT Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:000087829200011</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0068-106373.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>69</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Alternative ways to control weeds between rows in weeded check plots in corn (Zea mays) and soybean (Glycine max)</style></title><secondary-title><style face="normal" font="default">Weed Technology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Technology</style></full-title></periodical><pages end="44" start="36">36-44</pages><volume><style face="normal" font="default">14</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">competition</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> corn,Zea mays L.' Pioneer 3379 '</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> crop yield</style></keyword><keyword><style face="normal" font="default"> Glycine max</style></keyword><keyword><style face="normal" font="default"> GLYCINE-MAX</style></keyword><keyword><style face="normal" font="default"> GROUND COVER</style></keyword><keyword><style face="normal" font="default"> INTERFERENCE</style></keyword><keyword><style face="normal" font="default"> mowing</style></keyword><keyword><style face="normal" font="default"> no-tillage</style></keyword><keyword><style face="normal" font="default"> PANICUM</style></keyword><keyword><style face="normal" font="default"> patterns</style></keyword><keyword><style face="normal" font="default"> RAINFALL</style></keyword><keyword><style face="normal" font="default"> rototilling</style></keyword><keyword><style face="normal" font="default"> SETFA</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soybean,Glycine max (L.) Merr.' Pioneer 9381 '</style></keyword><keyword><style face="normal" font="default"> sustainable agriculture</style></keyword><keyword><style face="normal" font="default"> tillage</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> weed competition</style></keyword><keyword><style face="normal" font="default"> weed control</style></keyword><keyword><style face="normal" font="default"> WEEDS</style></keyword><keyword><style face="normal" font="default"> WINTER-WHEAT</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> Zea mays</style></keyword><keyword><style face="normal" font="default"> ZEA-MAYS</style></keyword></keywords><dates><year Day="0" Month="0" Year="2000">2000</year></dates><abstract><style face="normal" font="default">Weeded check plots are an integral part of most weed control experiments. They provide a measure of the maximum crop yield without weed competition in a given site-year environment. The traditional way to create weeded check plots is to hoc and pull weeds by hand in the row and hoe weeds between rows. But erratic heavy rainfall can prevent timely hoeing. The objective of this experiment was to compare faster, less-laborious mechanized ways to control weeds between crop rows as alternatives to hoeing in corn and soybean. Hoeing, the traditional method for controlling weeds between crop rows, was compared with either repeated mowing using a cord-mower or a string-trimmer or shallow tilling with a rototiller between rows. Weeds growing in rows were controlled by hand-pulling and hoeing because the focus of the experiment was on speeding weed control between rows. All four methods for controlling weeds between crop rows were equally effective when measured as either corn or soybean yield, visual rating of weed control, or weed ground cover in two rears under contrasting rainfall patterns. Cord-mowing or string-trimming between rows was possible when soil was dry enough to walk upon but too wet to hoe or rototill</style></abstract><notes><style face="normal" font="default">JArticleJAN-MARDiscipline: AGRONOMY; PLANT Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:000086220300006</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0069-102555.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>332</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Govindaraju,R.S.</style></author><author><style face="normal" font="default"> Rao,A.R.</style></author><author><style face="normal" font="default"> Leib,D.</style></author><author><style face="normal" font="default"> Najjar,Y.M.</style></author><author><style face="normal" font="default"> Gupta,H.V.</style></author><author><style face="normal" font="default"> Hjelmfelt,A.T.</style></author></authors></contributors><titles><title><style face="normal" font="default">Artificial neural networks in hydrology I: preliminary concepts</style></title><secondary-title><style face="normal" font="default">Journal of Hydraulic Engineering-Asce</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Hydraulic Engineering-Asce</style></full-title></periodical><pages end="123" start="115">115-123</pages><volume><style face="normal" font="default">5</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">hydrology</style></keyword><keyword><style face="normal" font="default"> NETWORK</style></keyword><keyword><style face="normal" font="default"> neural networks</style></keyword></keywords><dates><year Day="0" Month="0" Year="2000">2000</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0332-hjelmfelt.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>333</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Govindaraju,R.S.</style></author><author><style face="normal" font="default"> Rao,A.R.</style></author><author><style face="normal" font="default"> Leib,D.</style></author><author><style face="normal" font="default"> Najjar,Y.M.</style></author><author><style face="normal" font="default"> Gupta,H.V.</style></author><author><style face="normal" font="default"> Hjelmfelt,A.T.</style></author></authors></contributors><titles><title><style face="normal" font="default">Artificial neural networks in hydrology II: hydrologic applications</style></title><secondary-title><style face="normal" font="default">Journal of Hydraulic Engineering-Asce</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Hydraulic Engineering-Asce</style></full-title></periodical><pages end="137" start="124">124-137</pages><volume><style face="normal" font="default">5</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">applications</style></keyword><keyword><style face="normal" font="default"> hydrology</style></keyword><keyword><style face="normal" font="default"> NETWORK</style></keyword><keyword><style face="normal" font="default"> neural networks</style></keyword></keywords><dates><year Day="0" Month="0" Year="2000">2000</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0333-hjelmfelt.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>197</rec-number><ref-type name="Conference Proceeding">12</ref-type><contributors><authors><author><style face="normal" font="default">Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Growth Suppression of Annual Weeds by Deleterious Rhizobacteria Integrated with Cover Crops</style></title><secondary-title><style face="normal" font="default">Proceedings of the X International Symposium on Biological Control of Weeds</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Proceedings of the X International Symposium on Biological Control of Weeds</style></full-title></periodical><pages end="940" start="931">931-940</pages><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">cover crops</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> crops</style></keyword><keyword><style face="normal" font="default"> DELETERIOUS RHIZOBACTERIA</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> growth suppression</style></keyword><keyword><style face="normal" font="default"> RHIZOBACTERIA</style></keyword><keyword><style face="normal" font="default"> SUPPRESSION</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> WEEDS</style></keyword></keywords><dates><year Day="0" Month="0" Year="2000">2000</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0197-kremer.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>57</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Li,J.M.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Rhizobacteria associated with weed seedlings in different cropping systems</style></title><secondary-title><style face="normal" font="default">Weed Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Science</style></full-title></periodical><pages end="741" start="734">734-741</pages><volume><style face="normal" font="default">48</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">Amaranthus retroflexus L.AMARE,redroot pigweed</style></keyword><keyword><style face="normal" font="default"> BACTERIA</style></keyword><keyword><style face="normal" font="default"> BIOCONTROL AGENTS</style></keyword><keyword><style face="normal" font="default"> BIOLOGICAL-CONTROL</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> crop management</style></keyword><keyword><style face="normal" font="default"> crop production</style></keyword><keyword><style face="normal" font="default"> crop rotation</style></keyword><keyword><style face="normal" font="default"> cropping systems</style></keyword><keyword><style face="normal" font="default"> DELETERIOUS RHIZOBACTERIA</style></keyword><keyword><style face="normal" font="default"> ECOLOGY</style></keyword><keyword><style face="normal" font="default"> fertility management</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> Fragaria virginiana L.,strawberry</style></keyword><keyword><style face="normal" font="default"> Glycine max (L.) Merr.,soybean</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> INHIBITORY PSEUDOMONADS</style></keyword><keyword><style face="normal" font="default"> integrated weed management</style></keyword><keyword><style face="normal" font="default"> Ipomoea hederacea (L.) Jacq.IPOHE,ivyleaf morningglory</style></keyword><keyword><style face="normal" font="default"> L.sativa bioassay</style></keyword><keyword><style face="normal" font="default"> Lactuca sativa L.'Blackseeded simpson',lettuce</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> MICROBIAL BIOMASS</style></keyword><keyword><style face="normal" font="default"> MICROORGANISMS</style></keyword><keyword><style face="normal" font="default"> no-tillage</style></keyword><keyword><style face="normal" font="default"> organic matter</style></keyword><keyword><style face="normal" font="default"> ORGANIC-MATTER</style></keyword><keyword><style face="normal" font="default"> PHYTOTOXICITY</style></keyword><keyword><style face="normal" font="default"> PLANTS</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> RHIZOBACTERIA</style></keyword><keyword><style face="normal" font="default"> rhizosphere</style></keyword><keyword><style face="normal" font="default"> SEEDLINGS</style></keyword><keyword><style face="normal" font="default"> Setaria faberi Herrm.SETFA,giant foxtail</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil microorganisms</style></keyword><keyword><style face="normal" font="default"> soil organic matter</style></keyword><keyword><style face="normal" font="default"> species</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> tillage</style></keyword><keyword><style face="normal" font="default"> Triticum aestivum L.,wheat</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> weed management</style></keyword><keyword><style face="normal" font="default"> WINTER-WHEAT</style></keyword><keyword><style face="normal" font="default"> Zea mays L.,corn</style></keyword></keywords><dates><year Day="0" Month="0" Year="2000">2000</year></dates><abstract><style face="normal" font="default">Rhizobacteria isolated from the rhizospheres of dominant weed species in six representative cropping systems and one native prairie ecosystem in mid-Missouri were screened for phytotoxicity on Lactuca sativa seedlings and their host plants in the laboratory. The proportions of deleterious rhizobacteria (DRB) were compared among different cropping systems to determine possible effects of crop management practices on the occurrence of DRB. Phytotoxicity screening on L. sativa seedlings revealed that an integrated crop management system with a Zea mays-Glycine max-Triticum aestivum cover crop rotation under no-tillage had the highest proportion of DRB at 25.3%, followed by an organic farming system with continuous Fragaria virginiana (strawberry) and organic amendments under minimum tillage at 22.9%. A continuous cool-season grass-legume meadow with no agrochemical inputs had the lowest proportion of DRB at 13%. Crop management practices that maintained high soil organic matter had higher proportions of DRB compared to cropping systems with lower organic matter. Phytotoxicity screening on host plants greatly reduced the proportion of rhizobacteria characterized as DRB, likely because of the high sensitivity of L. sativa seedlings to phytotoxins. Although screening on L. sativa is an effective method to detect phytotoxic rhizobacteria, our research indicates that it is essential to test selected cultures on their host weed species for accurate assessment of their occurrence in the field. Using this approach, we found that crop management practices influence the occurrence of DRB naturally associated with weed seedlings. Results suggest that crop production systems can be developed to favor soil microorganisms such as DRB that affect weed growth and thereby become important considerations in overall weed management</style></abstract><notes><style face="normal" font="default">JArticleNOV-DECDiscipline: AGRONOMY; PLANT Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:000166182800015</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0057-111486.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>67</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Oehrle,N.W.</style></author><author><style face="normal" font="default"> Karr,D.B.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Emerich,D.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Enhanced attachment of Bradyrhizobium japonicum to soybean through reduced root colonization of internally seedborne microorganisms</style></title><secondary-title><style face="normal" font="default">Canadian Journal of Microbiology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Canadian Journal of Microbiology</style></full-title></periodical><pages end="606" start="600">600-606</pages><volume><style face="normal" font="default">46</style></volume><number><style face="normal" font="default">7</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">BACTERIA</style></keyword><keyword><style face="normal" font="default"> BIOLOGY</style></keyword><keyword><style face="normal" font="default"> Bradyrhizobium japonicum</style></keyword><keyword><style face="normal" font="default"> colonization</style></keyword><keyword><style face="normal" font="default"> competition</style></keyword><keyword><style face="normal" font="default"> CULTURES</style></keyword><keyword><style face="normal" font="default"> FIXATION</style></keyword><keyword><style face="normal" font="default"> GERMINATION</style></keyword><keyword><style face="normal" font="default"> Glycine max</style></keyword><keyword><style face="normal" font="default"> GLYCINE-MAX</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> internally seedborne microorganisms</style></keyword><keyword><style face="normal" font="default"> kinetics</style></keyword><keyword><style face="normal" font="default"> microbial attachment</style></keyword><keyword><style face="normal" font="default"> MICROORGANISMS</style></keyword><keyword><style face="normal" font="default"> mutants</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword><keyword><style face="normal" font="default"> NODULATION</style></keyword><keyword><style face="normal" font="default"> penicillin G</style></keyword><keyword><style face="normal" font="default"> plant development</style></keyword><keyword><style face="normal" font="default"> RATES</style></keyword><keyword><style face="normal" font="default"> RHIZOBIUM-JAPONICUM</style></keyword><keyword><style face="normal" font="default"> SEED</style></keyword><keyword><style face="normal" font="default"> SEEDLINGS</style></keyword><keyword><style face="normal" font="default"> SEEDS</style></keyword><keyword><style face="normal" font="default"> soybean (Glycine max)</style></keyword><keyword><style face="normal" font="default"> STRAINS</style></keyword><keyword><style face="normal" font="default"> SURFACE</style></keyword></keywords><dates><year Day="0" Month="0" Year="2000">2000</year></dates><abstract><style face="normal" font="default">Internally seedborne microorganisms are those surviving common surface sterilization procedures. Such microbes often colonize the radicle surface of a germinating soybean (Glycine max) seed, introducing an undefined parameter into studies on attachment and infection by Bradyrhizobium japonicum. Bacterial isolates from surface-sterilized soybean seed, cv. Williams 82 and cv. Maverick, used in our studies, were identified as Agrobacterium radiobacter, Aeromonas sp., Bacillus spp., Chryseomonas luteola, Flavimonas oryzihabitans, and Sphingomonas paucimobilis. Growth of these microbes during seed germination was reduced by treating germinating seeds with 500 mu g/mL penicillin G. The effects of this antibiotic on seedling development and on B. japonicum 2143 attachment, nodulation, and nitrogen fixation are reported here. Penicillin G treatment of seeds did not reduce seed germination or root tip growth, or affect seedling development. No differences in nodulation kinetics, nitrogen fixation onset or rates were observed. However, the number of B. japonicum attached to treated intact seedlings was enhanced 200-325%, demonstrating that other root-colonizing bacteria can interfere with rhizobial attachment. Penicillin G treatment of soybean seedlings can be used to reduce the root colonizing microbes, which introduce an undefined parameter into studies of attachment of B. japonicum to the soybean root, without affecting plant development</style></abstract><notes><style face="normal" font="default">JArticleJULDiscipline: BIOCHEMISTRY &amp; MOLECULAR BIOLOGY; BIOTECHNOLOGY &amp; APPLIED MICROBIOLOGY; IMMUNOLOGY; MICROBIOLOGY</style></notes><urls><web-urls><url ppv-ref="no">ISI:000088272400002</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0067-109744.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>138</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Wang,M.H.</style></author><author><style face="normal" font="default"> Hjelmfelt,A.T.</style></author><author><style face="normal" font="default"> Garbrecht,J.</style></author></authors></contributors><auth-address><style face="normal" font="default">Aqua Terra Consultants, Mt View, CA 94043 USAUSDA ARS, Cropping Syst &amp; Water Qual Res Unit, Columbia, MO 65211 USAUSDA ARS, Grazinglands Res Lab, El Reno, OK 73036 USA</style></auth-address><titles><title><style face="normal" font="default">DEM aggregation for watershed modeling</style></title><secondary-title><style face="normal" font="default">Journal of the American Water Resources Association</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of the American Water Resources Association</style></full-title></periodical><pages end="584" start="579">579-584</pages><volume><style face="normal" font="default">36</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">applications</style></keyword><keyword><style face="normal" font="default"> DEM</style></keyword><keyword><style face="normal" font="default"> DEM aggregation</style></keyword><keyword><style face="normal" font="default"> digital elevation model</style></keyword><keyword><style face="normal" font="default"> DIGITAL ELEVATION MODELS</style></keyword><keyword><style face="normal" font="default"> drainage</style></keyword><keyword><style face="normal" font="default"> DRAINAGE NETWORKS</style></keyword><keyword><style face="normal" font="default"> extraction</style></keyword><keyword><style face="normal" font="default"> FLOW</style></keyword><keyword><style face="normal" font="default"> flow direction</style></keyword><keyword><style face="normal" font="default"> information</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> models</style></keyword><keyword><style face="normal" font="default"> NETWORK</style></keyword><keyword><style face="normal" font="default"> PATTERN</style></keyword><keyword><style face="normal" font="default"> QUALITY</style></keyword><keyword><style face="normal" font="default"> size</style></keyword><keyword><style face="normal" font="default"> TIME</style></keyword><keyword><style face="normal" font="default"> topography</style></keyword><keyword><style face="normal" font="default"> USDA</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> water quality</style></keyword><keyword><style face="normal" font="default"> WATER-QUALITY</style></keyword><keyword><style face="normal" font="default"> watershed</style></keyword><keyword><style face="normal" font="default"> watershed properties</style></keyword></keywords><dates><year Day="0" Month="0" Year="2000">2000</year></dates><isbn><style face="normal" font="default">1093-474X</style></isbn><abstract><style face="normal" font="default">The widely available USGS 7.5-minute Digital Elevation Model (DEM) has a cell size of approximately 30 m x 30 m. This high resolution topographic information is impractical for many applications of distributed hydrologic and water quality models. In this study, cells were aggregated into coarse-resolution areal units, termed grids, and a method to approximate flow direction for coarse-resolution grids from 30 m DEM cells was developed. The method considers the flow path defined from the fine-resolution DEM in determining a grid's flow direction and makes flow directions for grids closely follow the flow pattern suggested by the DEM. The aggregation method was applied to a DEM of Goodwater Creek, a nearly flat watershed that is located in central Missouri. The drainage networks derived for different levels of cell aggregations showed that grid aggregates of the Goodwater Creek watershed provided an adequate representation of the landscape topography</style></abstract><notes><style face="normal" font="default">Times Cited: 2ArticleEnglishWang, M. HAqua Terra Consultants, 2685 Marine Way,Ste 1314 Mt View, Mt View, CA 94043 USACited References Count: 11328HLAMER WATER RESOURCES ASSOC4 WEST FEDERAL ST, PO BOX 1626, MIDDLEBURG, VA 20118-1626 USAMIDDLEBURG</style></notes><urls><web-urls><url ppv-ref="no">ISI:000087844600010</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0138-wang.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>80</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Begonia,M.F.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Chemotaxis of deleterious rhizobacteria to birdsfoot trefoil</style></title><secondary-title><style face="normal" font="default">Applied Soil Ecology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Applied Soil Ecology</style></full-title></periodical><pages end="42" start="35">35-42</pages><volume><style face="normal" font="default">11</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">AGROBACTERIUM-TUMEFACIENS</style></keyword><keyword><style face="normal" font="default"> BACTERIA</style></keyword><keyword><style face="normal" font="default"> birdsfoot trefoil</style></keyword><keyword><style face="normal" font="default"> chemotaxis</style></keyword><keyword><style face="normal" font="default"> colonization</style></keyword><keyword><style face="normal" font="default"> DELETERIOUS RHIZOBACTERIA</style></keyword><keyword><style face="normal" font="default"> FLUORESCENT PSEUDOMONADS</style></keyword><keyword><style face="normal" font="default"> genes</style></keyword><keyword><style face="normal" font="default"> Lotus corniculatus</style></keyword><keyword><style face="normal" font="default"> microbial ecology</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> RHIZOBACTERIA</style></keyword><keyword><style face="normal" font="default"> rhizosphere</style></keyword><keyword><style face="normal" font="default"> roots</style></keyword><keyword><style face="normal" font="default"> SEED</style></keyword><keyword><style face="normal" font="default"> SEEDS</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> spermosphere</style></keyword><keyword><style face="normal" font="default"> TI-PLASMID</style></keyword></keywords><dates><year Day="0" Month="0" Year="1999">1999</year></dates><abstract><style face="normal" font="default">Intact seeds and seed and seedling root exudates of birdsfoot trefoil (Lotus corniculatus L.) were used as chemoattractants in experiments to determine the relative importance of chemotaxis in spermosphere and rhizosphere colonization by selected rhizobacteria. Results for soft-agar, capillary tube and soil chemotaxis assays indicated that selected deleterious rhizobacteria were attracted to seed and seedling root exudates. Several sugars and phenolic fractions detected in exudates were chemoattractants for these rhizobacteria. Using soil-chemotaxis assemblies, migration of rhizobacterial isolates through 2 cm distances of soil toward birdsfoot trefoil seeds was detected within 24 h. Isolates were not detected at the same site in soils without seeds until 72 h after inoculation. These results suggest that attraction of deleterious rhizobacteria toward seeds and seedling roots mediated by exudates (chemotaxis) might be the first step in the establishment and subsequent colonization of bacteria involved in soilborne disease complexes of birdsfoot trefoil. (C) 1999 Elsevier Science B.V</style></abstract><notes><style face="normal" font="default">JArticleJANDiscipline: AGRICULTURE, SOIL Discipline: IENCE</style></notes><urls><web-urls><url ppv-ref="no">ISI:000078245400005</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0080-begonia.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>72</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Brinkman,M.A.</style></author><author><style face="normal" font="default"> Clay,S.A.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Influence of deleterious rhizobacteria on leafy spurge (Euphorbia esula) roots</style></title><secondary-title><style face="normal" font="default">Weed Technology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Technology</style></full-title></periodical><pages end="839" start="835">835-839</pages><volume><style face="normal" font="default">13</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">area</style></keyword><keyword><style face="normal" font="default"> BACTERIA</style></keyword><keyword><style face="normal" font="default"> DELETERIOUS RHIZOBACTERIA</style></keyword><keyword><style face="normal" font="default"> DOWNY BROME</style></keyword><keyword><style face="normal" font="default"> Euphorbia esula L-#(3) EPHES</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> leafy spurge</style></keyword><keyword><style face="normal" font="default"> NORTHERN PLAINS</style></keyword><keyword><style face="normal" font="default"> PATHOGENICITY</style></keyword><keyword><style face="normal" font="default"> Pseudomonas fluorescens [Trevisan (Migula)]</style></keyword><keyword><style face="normal" font="default"> PSEUDOMONAS-FLUORESCENS</style></keyword><keyword><style face="normal" font="default"> RHIZOBACTERIA</style></keyword><keyword><style face="normal" font="default"> roots</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> STRAIN</style></keyword><keyword><style face="normal" font="default"> STRAINS</style></keyword><keyword><style face="normal" font="default"> SUPPRESSION</style></keyword><keyword><style face="normal" font="default"> total nonstructural carbohydrates</style></keyword><keyword><style face="normal" font="default"> WEEDS</style></keyword></keywords><dates><year Day="0" Month="0" Year="1999">1999</year></dates><abstract><style face="normal" font="default">Rhizobacteria have been shown to be phytotoxic to leafy spurge in laboratory assays. This field study investigated the influence of two strains of Pseudomonas fluorescens [Trevisan, (Migula)], deleterious rhizobacteria (DRB), on root weight, root bud number, and root carbohydrate content of leafy spurge at three sites located in northeast and north-central South Dakota. Soils were inoculated with 2 g of starch-based granules containing no bacteria or starch granules containing 10(8) colony-forming units (cfu)/g of either bacterial strain LS102 (Montana origin) or LS174 (South Dakota origin). Bacterial strains were detected on root samples from treated areas. Root weight and root carbohydrate content were reduced about 20% compared to roots from control plots</style></abstract><notes><style face="normal" font="default">JArticleOCT-DECDiscipline: AGRONOMY; PLANT Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:000084922800026</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0072-kremer.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>77</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,P.A.</style></author><author><style face="normal" font="default"> Donald,W.W.</style></author><author><style face="normal" font="default"> Keaster,A.J.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Kendig,J.A.</style></author><author><style face="normal" font="default"> Sims,B.S.</style></author><author><style face="normal" font="default"> Mihail,J.D.</style></author></authors></contributors><titles><title><style face="normal" font="default">Changes in Heterodera glycines egg population density in continuous Glycine max over four years</style></title><secondary-title><style face="normal" font="default">Journal of Nematology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Nematology</style></full-title></periodical><pages end="53" start="45">45-53</pages><volume><style face="normal" font="default">31</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">area</style></keyword><keyword><style face="normal" font="default"> DENSITY</style></keyword><keyword><style face="normal" font="default"> detection</style></keyword><keyword><style face="normal" font="default"> distribution</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> fields</style></keyword><keyword><style face="normal" font="default"> geostatistics</style></keyword><keyword><style face="normal" font="default"> Glycine max</style></keyword><keyword><style face="normal" font="default"> GLYCINE-MAX</style></keyword><keyword><style face="normal" font="default"> Heterodera glycines</style></keyword><keyword><style face="normal" font="default"> kriging</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> maps</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> nematode management</style></keyword><keyword><style face="normal" font="default"> PLANT-PARASITIC NEMATODES</style></keyword><keyword><style face="normal" font="default"> PLOTS</style></keyword><keyword><style face="normal" font="default"> population density</style></keyword><keyword><style face="normal" font="default"> precision farming</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> semivariance</style></keyword><keyword><style face="normal" font="default"> soil properties</style></keyword><keyword><style face="normal" font="default"> soybean</style></keyword><keyword><style face="normal" font="default"> spatial statistics</style></keyword><keyword><style face="normal" font="default"> SPATIAL-ANALYSIS</style></keyword><keyword><style face="normal" font="default"> spring</style></keyword><keyword><style face="normal" font="default"> STATES</style></keyword><keyword><style face="normal" font="default"> TIME</style></keyword><keyword><style face="normal" font="default"> United States</style></keyword><keyword><style face="normal" font="default"> UNITED-STATES</style></keyword><keyword><style face="normal" font="default"> variable rate technology</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword></keywords><dates><year Day="0" Month="0" Year="1999">1999</year></dates><abstract><style face="normal" font="default">Soybean cyst nematode, Heterodera glycines, is found throughout soybean production areas of the United States, but the nematode's distribution is not uniform within states, counties, and individual fields. The goal of this research was to determine the spatial pattern of H. glycines population density in a field in southeastern Missouri and whether it changed over time in the absence of management practices. Geostatistical methods were used to describe and map the distribution of H. glycines over 4 years in a soybean (Glycine max) field in southeastern Missouri. Semivariograms and kriging, an interpolation method, were used to prepare isoarithmic contour maps and associated error maps. In the field studied, fall H. glycines population density (Pf) was poorly related to density the following spring (Pi). The distribution of peak H. glycines population density within the field changed from year to year, although high densities were often detected in the same general region of the field. The patchiness of H, glycines distribution within a field was verified, Yield was not related to H. glycines egg population density at planting, indicating that unmeasured variables were also reducing yield</style></abstract><notes><style face="normal" font="default">JArticleMARDiscipline: ZOOLOGY</style></notes><urls><web-urls><url ppv-ref="no">ISI:000081378300005</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0077-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>73</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Drummond,S.T.</style></author><author><style face="normal" font="default"> Fraisse,C.W.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Combine harvest area determination by vector processing of GPS position data</style></title><secondary-title><style face="normal" font="default">Transactions of the Asae</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the Asae</style></full-title></periodical><pages end="1227" start="1221">1221-1227</pages><volume><style face="normal" font="default">42</style></volume><number><style face="normal" font="default">5</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">accuracy</style></keyword><keyword><style face="normal" font="default"> agricultural engineering</style></keyword><keyword><style face="normal" font="default"> area</style></keyword><keyword><style face="normal" font="default"> COMBINE</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> crop yield</style></keyword><keyword><style face="normal" font="default"> crops</style></keyword><keyword><style face="normal" font="default"> determination</style></keyword><keyword><style face="normal" font="default"> GIS</style></keyword><keyword><style face="normal" font="default"> global positioning system</style></keyword><keyword><style face="normal" font="default"> GPS</style></keyword><keyword><style face="normal" font="default"> information</style></keyword><keyword><style face="normal" font="default"> maps</style></keyword><keyword><style face="normal" font="default"> measurement</style></keyword><keyword><style face="normal" font="default"> position</style></keyword><keyword><style face="normal" font="default"> precision farming</style></keyword><keyword><style face="normal" font="default"> swath width</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> TIME</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> yield map</style></keyword><keyword><style face="normal" font="default"> yield mapping</style></keyword><keyword><style face="normal" font="default"> yield monitor</style></keyword></keywords><dates><year Day="0" Month="0" Year="1999">1999</year></dates><abstract><style face="normal" font="default">The measurement of actual harvested area per unit time is an important component in the creation of accurate crop yield maps. For row crops, such as corn, these measurements can be made manually on most conventional yield monitors. However; in drilled or broadcast crops a more accurate and automated method is required In this study, a vector method was developed to determine actual combine harvest area at each time step of the harvest process from a global positioning system (GPS) trajectory. The algorithm was coded into a geographic information system (GIS), and modifications were made to increase computational efficiency. The method was compared with a previously reported raster method of harvest area determination on data collected during the 1997 drilled soybean harvest, using high accuracy real time kinematic GPS data. The vector method improved harvest area estimates by an average of 11% over the assumption of a constant, full swath width and provided a number of distinct advantages over the raster method</style></abstract><notes><style face="normal" font="default">JArticleSEP-OCTDiscipline: AGRICULTURAL ENGINEERING</style></notes><urls><web-urls><url ppv-ref="no">ISI:000083805700006</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0073-drummond.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>76</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Ghidey,F.</style></author><author><style face="normal" font="default"> Alberts,E.E.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author></authors></contributors><titles><title><style face="normal" font="default">Evaluation of the root zone water quality model using field-measured data from the Missouri MSEA</style></title><secondary-title><style face="normal" font="default">Agronomy Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Agronomy Journal</style></full-title></periodical><pages end="192" start="183">183-192</pages><volume><style face="normal" font="default">91</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">alachlor</style></keyword><keyword><style face="normal" font="default"> area</style></keyword><keyword><style face="normal" font="default"> atrazine</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> depth</style></keyword><keyword><style face="normal" font="default"> evaluation</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> losses</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> management systems</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> MOISTURE</style></keyword><keyword><style face="normal" font="default"> no-till</style></keyword><keyword><style face="normal" font="default"> performance</style></keyword><keyword><style face="normal" font="default"> prediction</style></keyword><keyword><style face="normal" font="default"> QUALITY</style></keyword><keyword><style face="normal" font="default"> runoff</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil depth</style></keyword><keyword><style face="normal" font="default"> soil moisture</style></keyword><keyword><style face="normal" font="default"> soil water</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> SURFACE</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> SYSTEMS</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> water quality</style></keyword><keyword><style face="normal" font="default"> WATER-QUALITY</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> Zea mays</style></keyword><keyword><style face="normal" font="default"> ZEA-MAYS</style></keyword><keyword><style face="normal" font="default"> ZONE</style></keyword></keywords><dates><year Day="0" Month="0" Year="1999">1999</year></dates><abstract><style face="normal" font="default">The USDA-ARS Root Zone Water Quality Model (RZWQM) is a comprehensive computer model developed to simulate water, chemical, and biological processes in the root zone of agricultural management systems. The model is capable of evaluating the effects of various cropping and management practices on surface and ground water quality. In this study, the performance of RZWQM Version 3.2 was evaluated for a claypan soil, particularly surface runoff and chemical loss to surface runoff predictions. The model was calibrated and evaluated using data collected from the Missouri Management Systems Evaluation Area (MSEA) and the Kingdom City runoff plots. Soil water predictions of the model compared well with those measured, particularly at the 15-, 60-, 75-, and 90-cm soil depths. In most cases, corn (Zea mays L.) and soybean [Glycine max (L.) Merr.] yield predictions were within 15 and 20%, respectively, of those measured. Using the macropore option (constant cracking) greatly improved the prediction of chemical losses to seepage. Annual runoff simulated for corn and soybean under conventional and no-till systems was adequately predicted. The model underpredicted large runoff events and overpredicted runoff events that occurred after long dry periods when soil cracking was a dominant factor. The model overpredicted NO3-N concentrations in runoff but underpredicted concentrations in near-surface soils. Predicted and measured atrazine [6-chloro-N-ethyl-N'-(1-methylethyl)-1,3,5-triazine- 2,4-diamine] and alachlor [2-chloro-N-(2,6-diethylphenyl)-N-(methoxymethyl)acetamide) concentrations in surface runoff compared well, particularly when the computed runoff was close to that measured. In this study, the model was run using the option of constant cracking in the soil. To improve the predictions of agrichemical losses to runoff and seepage, RZWQM should include the capability to predict variable soil cracking based on soil moisture</style></abstract><notes><style face="normal" font="default">JArticleMAR-APRDiscipline: AGRONOMY</style></notes><urls><web-urls><url ppv-ref="no">ISI:000081646800004</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0076-ghidey.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>78</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Ghidey,F.</style></author><author><style face="normal" font="default"> Alberts,E.E.</style></author></authors></contributors><titles><title><style face="normal" font="default">Temporal and spatial patterns of nitrate in a claypan soil</style></title><secondary-title><style face="normal" font="default">Journal of Environmental Quality</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Environmental Quality</style></full-title></periodical><pages end="594" start="584">584-594</pages><volume><style face="normal" font="default">28</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">applications</style></keyword><keyword><style face="normal" font="default"> CAPACITY</style></keyword><keyword><style face="normal" font="default"> cation exchange capacity</style></keyword><keyword><style face="normal" font="default"> DENITRIFICATION</style></keyword><keyword><style face="normal" font="default"> depth</style></keyword><keyword><style face="normal" font="default"> depth-to-claypan</style></keyword><keyword><style face="normal" font="default"> distribution</style></keyword><keyword><style face="normal" font="default"> fertilizer</style></keyword><keyword><style face="normal" font="default"> fertilizer application</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> groundwater</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> NITRATE</style></keyword><keyword><style face="normal" font="default"> NORTH-CENTRAL MISSOURI</style></keyword><keyword><style face="normal" font="default"> organic matter</style></keyword><keyword><style face="normal" font="default"> ORGANIC-MATTER</style></keyword><keyword><style face="normal" font="default"> patterns</style></keyword><keyword><style face="normal" font="default"> runoff</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil depth</style></keyword><keyword><style face="normal" font="default"> soil pH</style></keyword><keyword><style face="normal" font="default"> soil water</style></keyword><keyword><style face="normal" font="default"> soil water content</style></keyword><keyword><style face="normal" font="default"> spatial distribution</style></keyword><keyword><style face="normal" font="default"> SURFACE</style></keyword><keyword><style face="normal" font="default"> surface water</style></keyword><keyword><style face="normal" font="default"> SURFACE-WATER</style></keyword><keyword><style face="normal" font="default"> TIME</style></keyword><keyword><style face="normal" font="default"> topography</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> WATER-CONTENT</style></keyword></keywords><dates><year Day="0" Month="0" Year="1999">1999</year></dates><abstract><style face="normal" font="default">The temporal and spatial patterns of NO3-N were studied on a 35-ha field located in the claypan soil region of north-central Missouri. Soil samples were collected from the 0- to 5-, 5- to 10-, and 10- to 15-cm depths and were analyzed for NO3-N concentrations. Surface water samples from the field were collected for NO3-N and NH4-N analysis during each surface runoff event. Groundwater samples mere also taken from the field wells four times a year for 5 yr and analyzed for NO3-N concentrations. The effects of topography, depth to claypan, soil pH, organic matter (OM) content, cation exchange capacity (CEC), and soil water content on the spatial distribution of NO3-N concentration were also evaluated. Nitrate-N concentration in the 0- to 5-cm soil depth increased in the first few weeks following application, then decreased rapidly and was very low at harvest. During the study period, nitrate movement below the layer of fertilizer application was very low, and &lt;5% of the total N applied in the soil was lost to surface runoff Nitrate-N concentration in groundwater samples decreased by an average of 0.40 mg L-1 yr(-1) from 1992 to 1996, The semivariograms did not exhibit strong spatial dependency except for the samples collected 1 and 4 wk after fertilizer applications in 1993 and 1995, respectively. Nitrate-N concentration was poorly correlated to soil water content and depth to claypan and relatively strongly correlated to elevation and soil pH</style></abstract><notes><style face="normal" font="default">JArticleMAR-APRDiscipline: ENVIRONMENTAL Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:000079116500024</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0078-ghidey.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>334</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Hjelmfelt,A.T.</style></author><author><style face="normal" font="default"> Wang,M.</style></author></authors></contributors><titles><title><style face="normal" font="default">Modeling hydrologic and water quality responses to grass waterways</style></title><secondary-title><style face="normal" font="default">Journal of Hydrologic Engineering</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Hydrologic Engineering</style></full-title></periodical><pages end="256" start="251">251-256</pages><volume><style face="normal" font="default">4</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">grass waterways</style></keyword><keyword><style face="normal" font="default"> MODELING</style></keyword><keyword><style face="normal" font="default"> QUALITY</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> WATER-QUALITY</style></keyword><keyword><style face="normal" font="default"> water quality</style></keyword></keywords><dates><year Day="0" Month="0" Year="1999">1999</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0334-hjelmfelt.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>71</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kitchen,N.R.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Drummond,S.T.</style></author></authors></contributors><titles><title><style face="normal" font="default">Soil electrical conductivity as a crop productivity measure for claypan soils</style></title><secondary-title><style face="normal" font="default">Journal of Production Agriculture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Production Agriculture</style></full-title></periodical><pages end="617" start="607">607-617</pages><volume><style face="normal" font="default">12</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">BOUNDARY-LINE</style></keyword><keyword><style face="normal" font="default"> claypan soils</style></keyword><keyword><style face="normal" font="default"> COMBINE</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> crops</style></keyword><keyword><style face="normal" font="default"> DENITRIFICATION</style></keyword><keyword><style face="normal" font="default"> electrical conductivity</style></keyword><keyword><style face="normal" font="default"> ELECTRICAL-CONDUCTIVITY</style></keyword><keyword><style face="normal" font="default"> EROSION</style></keyword><keyword><style face="normal" font="default"> fertilizer application</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> fields</style></keyword><keyword><style face="normal" font="default"> GRAIN-YIELD</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> information</style></keyword><keyword><style face="normal" font="default"> LANDSCAPE POSITION</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> maps</style></keyword><keyword><style face="normal" font="default"> monitoring</style></keyword><keyword><style face="normal" font="default"> planning</style></keyword><keyword><style face="normal" font="default"> prediction</style></keyword><keyword><style face="normal" font="default"> site specific management</style></keyword><keyword><style face="normal" font="default"> site-specific</style></keyword><keyword><style face="normal" font="default"> site-specific management</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil electrical conductivity</style></keyword><keyword><style face="normal" font="default"> soil properties</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> topsoil</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword><keyword><style face="normal" font="default"> variation</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> WHEAT YIELD</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> yield map</style></keyword><keyword><style face="normal" font="default"> Zea mays</style></keyword><keyword><style face="normal" font="default"> ZEA-MAYS</style></keyword></keywords><dates><year Day="0" Month="0" Year="1999">1999</year></dates><abstract><style face="normal" font="default">Inexpensive and accurate methods for spatially measuring soil properties are needed that enhance interpretation of yield maps and improve planning for site-specific management. This study was conducted to investigate the relationship of apparent profile soil electrical conductivity (ECa) and grain yield on claypan soils (Udollic Ochraqualfs). Grain yield data were obtained by combine yield monitoring and ECa by a mobile, on-the-go electromagnetic (EM) induction meter. Investigations were made on four claypan fields between 1993 and 1997 for a total of 13 site-years. Crops included five site-years of corn (Zea mays L.), seven site-years of soybean [Glycine max (L.) Merr.], and one site-year of grain sorghum [Sorghum bicolor (L) Moench]. Transformed ECa (1/ECa) was regressed to topsoil thickness giving r(2) values > 0.75 for three of the four fields. The relationship between grain yield and ECa was examined for each site-year in scatter plots. A boundary line using a log-normal function was fit to the upper edge of data in the scatter plots. A significant relationship between grain yield and ECa (boundary lines with r(2) > 0.25 in nine out of 13 site-years) was apparent, but climate, crop type, and specific field information was needed to explain the shape of the potential yield by ECa interaction. Boundary line data of each site-year fell into one of four condition categories: Condition 1-site-years where yield increased with decreasing ECa; Condition 2-site-years where yield decreased with decreasing ECa; Condition 3-where yield was less at low and high ECa values and highest at some mid-range values of ECa; and Condition 4-site-years where yield variation was mostly unrelated to ECa. Soil ECa provided a measure of the within-field soil differences associated with topsoil thickness, which for these claypan soils is a measure of root-zone suitability for crop growth and yield</style></abstract><notes><style face="normal" font="default">JArticleOCT-DECDiscipline: AGRONOMY</style></notes><urls><web-urls><url ppv-ref="no">ISI:000084993900010</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0071-kitchen.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>208</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Growth Suppression of Annual Weeds by Deleterious Rhizobacteria Integrated with Cover Crops</style></title><secondary-title><style face="normal" font="default">Proceedings of the X International Symposium on Biological Control of Weeds</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Proceedings of the X International Symposium on Biological Control of Weeds</style></full-title></periodical><pages end="940" start="931">931-940</pages><volume><style face="normal" font="default">4</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">growth</style></keyword><keyword><style face="normal" font="default"> growth suppression</style></keyword><keyword><style face="normal" font="default"> SUPPRESSION</style></keyword><keyword><style face="normal" font="default"> WEEDS</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> DELETERIOUS RHIZOBACTERIA</style></keyword><keyword><style face="normal" font="default"> RHIZOBACTERIA</style></keyword><keyword><style face="normal" font="default"> cover crops</style></keyword><keyword><style face="normal" font="default"> crops</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword></keywords><dates><year Day="0" Month="0" Year="1999">1999</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0208-kremer.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>75</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lerch,R.N.</style></author><author><style face="normal" font="default"> Thurman,E.M.</style></author><author><style face="normal" font="default"> Blanchard,P.E.</style></author></authors></contributors><titles><title><style face="normal" font="default">Hydroxyatrazine in soils and sediments</style></title><secondary-title><style face="normal" font="default">Environmental Toxicology and Chemistry</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Environmental Toxicology and Chemistry</style></full-title></periodical><pages end="2168" start="2161">2161-2168</pages><volume><style face="normal" font="default">18</style></volume><number><style face="normal" font="default">10</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">2 SOILS</style></keyword><keyword><style face="normal" font="default"> ADSORPTION</style></keyword><keyword><style face="normal" font="default"> atrazine</style></keyword><keyword><style face="normal" font="default"> atrazine degradation products</style></keyword><keyword><style face="normal" font="default"> BOUND RESIDUE FORMATION</style></keyword><keyword><style face="normal" font="default"> CAPACITY</style></keyword><keyword><style face="normal" font="default"> cation exchange capacity</style></keyword><keyword><style face="normal" font="default"> chromatography</style></keyword><keyword><style face="normal" font="default"> CLAY</style></keyword><keyword><style face="normal" font="default"> contamination</style></keyword><keyword><style face="normal" font="default"> correlation</style></keyword><keyword><style face="normal" font="default"> DEETHYLATRAZINE</style></keyword><keyword><style face="normal" font="default"> DEISOPROPYLATRAZINE</style></keyword><keyword><style face="normal" font="default"> DESORPTION</style></keyword><keyword><style face="normal" font="default"> high performance liquid chromatography</style></keyword><keyword><style face="normal" font="default"> HYDROLYSIS</style></keyword><keyword><style face="normal" font="default"> HYDROXYATRAZINE</style></keyword><keyword><style face="normal" font="default"> LIQUID-CHROMATOGRAPHY</style></keyword><keyword><style face="normal" font="default"> mixed-mode sorption</style></keyword><keyword><style face="normal" font="default"> organic matter</style></keyword><keyword><style face="normal" font="default"> ORGANIC-CARBON</style></keyword><keyword><style face="normal" font="default"> ORGANIC-MATTER</style></keyword><keyword><style face="normal" font="default"> performance</style></keyword><keyword><style face="normal" font="default"> persistence</style></keyword><keyword><style face="normal" font="default"> runoff</style></keyword><keyword><style face="normal" font="default"> S-TRIAZINE HERBICIDES</style></keyword><keyword><style face="normal" font="default"> SEDIMENT</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil properties</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> sorption</style></keyword><keyword><style face="normal" font="default"> stream sediments</style></keyword><keyword><style face="normal" font="default"> SURFACE</style></keyword><keyword><style face="normal" font="default"> transport</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> watershed</style></keyword><keyword><style face="normal" font="default"> WESTERN TENNESSEE SOIL</style></keyword></keywords><dates><year Day="0" Month="0" Year="1999">1999</year></dates><abstract><style face="normal" font="default">Hydroxyatrazine (HA) is the major metabolite of atrazine in most surface soils. Knowledge of HA sorption to soils, and its pattern of stream water contamination suggest that it is persistent in the environment. Soils with different atrazine use histories were collected from four sites, and sediments were collected from an agricultural watershed. Samples were exhaustively extracted with a mixed-mode extractant, and HA was quantitated using high performance liquid chromatography with UV detection. Atrazine, deethylatrazine (DEA), and deisopropylatrazine (DIA) were also measured in all samples. Concentrations of HA were considerably greater than concentrations of atrazine, DEA, and DIA in all soils and sediments studied. Soil concentrations of HA ranged from 14 to 640 mu g/kg with a median concentration of 84 mu g/kg. Sediment concentrations of HA ranged from 11 to 96 mu g/kg, with a median concentration of 14 mu g/kg. Correlations of HA and atrazine concentrations to soil properties indicated that HA levels in soils were controlled by sorption of atrazine. Because atrazine hydrolysis is known to be enhanced by sorption and pH extremes, soils with high organic matter (OM) and clay content and low pH will result in greater atrazine sorption and subsequent hydrolysis. Significant correlation of HA concentrations to OM, pH, and cation exchange capacity of sediments indicated that mixed-mode sorption (i.e., binding by cation exchange and hydrophobic interactions) was the mechanism controlling HA levels in sediment. The presence of HA in soils and stream sediments at the levels observed support existing hypotheses regarding its transport in surface runoff. These results also indicated that persistence of HA in terrestrial and aquatic ecosystems is an additional risk factor associated with atrazine usage</style></abstract><notes><style face="normal" font="default">JArticleOCTDiscipline: ENVIRONMENTAL Discipline: IENCES; TOXICOLOGY</style></notes><urls><web-urls><url ppv-ref="no">ISI:000082814500007</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0075-lerch.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>258</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Carlson,S.J.</style></author><author><style face="normal" font="default"> Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Fall-applied glyphosate for Canada thistle (Cirsium arvense) control in spring wheat (Triticum aestivum)</style></title><secondary-title><style face="normal" font="default">Weed Technology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Technology</style></full-title></periodical><pages end="455" start="445">445-455</pages><volume><style face="normal" font="default">2</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">CANADA</style></keyword><keyword><style face="normal" font="default"> Canada thistle</style></keyword><keyword><style face="normal" font="default"> glyphosate</style></keyword><keyword><style face="normal" font="default"> spring</style></keyword><keyword><style face="normal" font="default"> TRITICUM-AESTIVUM</style></keyword><keyword><style face="normal" font="default"> Triticum aestivum</style></keyword><keyword><style face="normal" font="default"> WHEAT</style></keyword></keywords><dates><year Day="0" Month="0" Year="1998">1998</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0258-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>79</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Estimating relative crop yield loss resulting from herbicide damage using crop ground cover or rated stunting, with maize and sethoxydim as a case study</style></title><secondary-title><style face="normal" font="default">Weed Research</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Research</style></full-title></periodical><pages end="431" start="425">425-431</pages><volume><style face="normal" font="default">38</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">atrazine</style></keyword><keyword><style face="normal" font="default"> case studies</style></keyword><keyword><style face="normal" font="default"> CORN ZEA-MAYS</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> crop yield</style></keyword><keyword><style face="normal" font="default"> GROUND COVER</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> INJURY</style></keyword><keyword><style face="normal" font="default"> losses</style></keyword><keyword><style face="normal" font="default"> maize</style></keyword><keyword><style face="normal" font="default"> measurement</style></keyword><keyword><style face="normal" font="default"> models</style></keyword><keyword><style face="normal" font="default"> RATES</style></keyword><keyword><style face="normal" font="default"> REGRESSION-MODELS</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> SURFACE</style></keyword><keyword><style face="normal" font="default"> SYMPTOMS</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> yield losses</style></keyword><keyword><style face="normal" font="default"> Zea mays</style></keyword><keyword><style face="normal" font="default"> ZEA-MAYS</style></keyword></keywords><dates><year Day="0" Month="0" Year="1998">1998</year></dates><abstract><style face="normal" font="default">The research goal was to determine whether crop damage from herbicides measured early in the growing season soon after treatment could be used to estimate relative crop yield loss. Percentage stunting was rated visually and percentage crop ground cover (i.e. percentage of the ground surface covered by vegetation) was determined from video photographs taken 2-4 weeks after sethoxydim-susceptible maize (Zea mays L.) was sprayed with sethoxydim at various rates plus crop oil concentrate. Averaged over 3 years, relative percentage maize yield was a negative sigmoidal function of relative sethoxydim rates from 0.065x to 0.5x, where the Ix rate was 420 g a.i. ha(-1) (r(2) = 0.80). Relative maize yield was positively linearly related to percentage crop ground cover and negatively linearly related to rated percentage stunting averaged over 3 years. Linear regression models of relative maize yield vs. percentage maize ground cover explained only slightly more data variability (r(2) = 0.86) than did rated stunting (r(2) = 0.82) over 3 years. The advantages and disadvantages of rated stunting and crop ground cover as scientific measurements are discussed</style></abstract><notes><style face="normal" font="default">JArticleDECDiscipline: AGRONOMY; PLANT Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:000078334300004</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0079-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>85</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Estimated soybean (Glycine max) yield loss from herbicide damage using ground cover or rated stunting</style></title><secondary-title><style face="normal" font="default">Weed Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Science</style></full-title></periodical><pages end="458" start="454">454-458</pages><volume><style face="normal" font="default">46</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">atrazine</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> crop yield</style></keyword><keyword><style face="normal" font="default"> DRIFT</style></keyword><keyword><style face="normal" font="default"> Glycine max</style></keyword><keyword><style face="normal" font="default"> GLYCINE-MAX</style></keyword><keyword><style face="normal" font="default"> GROUND COVER</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> image analysis</style></keyword><keyword><style face="normal" font="default"> losses</style></keyword><keyword><style face="normal" font="default"> models</style></keyword><keyword><style face="normal" font="default"> PHYTOTOXICITY</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> RAINFALL</style></keyword><keyword><style face="normal" font="default"> RATES</style></keyword><keyword><style face="normal" font="default"> REGRESSION-MODELS</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> sethoxydim</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soybean</style></keyword><keyword><style face="normal" font="default"> soybean,Glycine max (L.) Merr.'Pioneer 9381'</style></keyword><keyword><style face="normal" font="default"> soybeans</style></keyword><keyword><style face="normal" font="default"> spraying</style></keyword><keyword><style face="normal" font="default"> thifensulfuron</style></keyword><keyword><style face="normal" font="default"> tolerance</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword><keyword><style face="normal" font="default"> video photography</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> yield losses</style></keyword></keywords><dates><year Day="0" Month="0" Year="1998">1998</year></dates><abstract><style face="normal" font="default">The primary goal of this research was to determine whether crop damage from herbicides measured soon after treatment could estimate relative crop yield loss. Two to 4 wk after spraying soybeans with an unregistered mixture of thifensulfuron pins sethoxydim at various rates plus crop oil concentrate, percent stunting was visually rated and percent projected ground cover of soybeans was determined from photographs. In each of 3 yr, relative percent soybean yield was a negative linear function of relative herbicide rate from 0.25X to 2X the registered (IX) rate. The IX rate of thifensulfuron and sethoxydim was 17.5 and 420 g ai ha(-1), respectively, Relative soybean yield was also negatively related linearly to stunting bur positively related linearly to soybean ground cover over 3 yr. Linear regression equation models of relative soybean yield versus percent soybean ground cover explained more model variability, more consistently (R-2 greater than or equal to 0.60 in two of 3 yr) than did either stunting (R-2 greater than or equal to 0.60 in one of 3 yr) or relative herbicide rate (R-2 = 0.37 to 0.48 over 3 yr). However, linear regression models for each independent variable differed from year to year and were related to differences in rainfall following treatment. Ways are suggested to increase regression model precision and between-year reproducibility</style></abstract><notes><style face="normal" font="default">JArticleJUL-AUGDiscipline: AGRONOMY; PLANT Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:000075808400013</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0085-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>257</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Established foxtail barley, Hordeum jubatum, control with glyphosate plus ammonium sulfate</style></title><secondary-title><style face="normal" font="default">Weed Technology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Technology</style></full-title></periodical><pages end="368" start="364">364-368</pages><volume><style face="normal" font="default">2</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">AMMONIA</style></keyword><keyword><style face="normal" font="default"> barley</style></keyword><keyword><style face="normal" font="default"> glyphosate</style></keyword></keywords><dates><year Day="0" Month="0" Year="1998">1998</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0257-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>84</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author><author><style face="normal" font="default"> Hjelmfelt,A.T.</style></author><author><style face="normal" font="default"> Alberts,E.E.</style></author></authors></contributors><titles><title><style face="normal" font="default">Herbicide distribution and variability across Goodwater Creek Watershed in North Central Missouri</style></title><secondary-title><style face="normal" font="default">Journal of Environmental Quality</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Environmental Quality</style></full-title></periodical><pages end="1009" start="999">999-1009</pages><volume><style face="normal" font="default">27</style></volume><number><style face="normal" font="default">5</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">alachlor</style></keyword><keyword><style face="normal" font="default"> area</style></keyword><keyword><style face="normal" font="default"> atrazine</style></keyword><keyword><style face="normal" font="default"> CONSERVATION TILLAGE</style></keyword><keyword><style face="normal" font="default"> contamination</style></keyword><keyword><style face="normal" font="default"> CORN PRODUCTION</style></keyword><keyword><style face="normal" font="default"> DEETHYLATRAZINE</style></keyword><keyword><style face="normal" font="default"> DEISOPROPYLATRAZINE</style></keyword><keyword><style face="normal" font="default"> distribution</style></keyword><keyword><style face="normal" font="default"> evaluation</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> infiltration</style></keyword><keyword><style face="normal" font="default"> LAKE ERIE BASIN</style></keyword><keyword><style face="normal" font="default"> LOAM</style></keyword><keyword><style face="normal" font="default"> loam soils</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> management systems</style></keyword><keyword><style face="normal" font="default"> MANAGEMENT-PRACTICES</style></keyword><keyword><style face="normal" font="default"> maps</style></keyword><keyword><style face="normal" font="default"> metolachlor</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> PESTICIDE RUNOFF</style></keyword><keyword><style face="normal" font="default"> PLOTS</style></keyword><keyword><style face="normal" font="default"> QUALITY</style></keyword><keyword><style face="normal" font="default"> RIVER</style></keyword><keyword><style face="normal" font="default"> runoff</style></keyword><keyword><style face="normal" font="default"> silt loam soils</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> spraying</style></keyword><keyword><style face="normal" font="default"> streams</style></keyword><keyword><style face="normal" font="default"> SURFACE</style></keyword><keyword><style face="normal" font="default"> surface water</style></keyword><keyword><style face="normal" font="default"> SURFACE-WATER</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> SYSTEMS</style></keyword><keyword><style face="normal" font="default"> TIME</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> water quality</style></keyword><keyword><style face="normal" font="default"> WATER-QUALITY</style></keyword><keyword><style face="normal" font="default"> watershed</style></keyword></keywords><dates><year Day="0" Month="0" Year="1998">1998</year></dates><abstract><style face="normal" font="default">One objective of the Missouri Management Systems Evaluation Area was to monitor and assess surface water quality, including spatial and temporal variability in herbicide concentrations within the 7250 ha Goodwater Creek Watershed. Stream water was sampled at all stream-road intersections across the watershed on 10 occasions in 1993 and 1994. Maps of herbicide distribution established that widespread, seasonal contamination of streams in Goodwater Creek Watershed was due to nonpoint sources (e.g., widespread, but normal farm use) rather than from point sources. Box plots documented concentration variability over time. Concentrations of atrazine (2-chloro-4-ethylamino-6-isopropylamino-s-triazine) deethylatrazine [2,4-diamino-6-chloro-N-(l-methylethyl)-1,3,5-tria deisopropylatrazine [2,4-diamino-6-chloro-N-ethyl-1,3,5-triazine], and metolachlor [2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamid e] were also monitored at least weekly from 1993 to 1994 at three V-notch webs through which 16.7, 43.4, and 100% of the watershed drained. Atrazine, deethylatrazine, and metolachlor were detected year round at concentrations above 0.1 mu g/L. Atrazine concentrations observed at webs were occasionally >100 mu g/L and were similar to edge-of-field concentrations observed elsewhere shortly after spraying in May to June, probably because the watershed's poorly drained, silt loam soils contain a restrictive claypan horizon that limits infiltration and encourages surface runoff</style></abstract><notes><style face="normal" font="default">JArticleSEP-OCTDiscipline: ENVIRONMENTAL Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:000076059600003</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0084-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>89</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Ghidey,F.</style></author><author><style face="normal" font="default"> Alberts,E.E.</style></author></authors></contributors><titles><title><style face="normal" font="default">Runoff and soil losses as affected by corn and soybean tillage systems</style></title><secondary-title><style face="normal" font="default">Journal of Soil and Water Conservation</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Soil and Water Conservation</style></full-title></periodical><pages end="70" start="64">64-70</pages><volume><style face="normal" font="default">53</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">corn</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> cropping system</style></keyword><keyword><style face="normal" font="default"> ECOLOGY</style></keyword><keyword><style face="normal" font="default"> EROSION</style></keyword><keyword><style face="normal" font="default"> fallow</style></keyword><keyword><style face="normal" font="default"> LOAM</style></keyword><keyword><style face="normal" font="default"> losses</style></keyword><keyword><style face="normal" font="default"> no-till</style></keyword><keyword><style face="normal" font="default"> PLOTS</style></keyword><keyword><style face="normal" font="default"> RAINFALL</style></keyword><keyword><style face="normal" font="default"> RESIDUE</style></keyword><keyword><style face="normal" font="default"> runoff</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SOIL LOSS</style></keyword><keyword><style face="normal" font="default"> soybean</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> SYSTEMS</style></keyword><keyword><style face="normal" font="default"> tillage</style></keyword><keyword><style face="normal" font="default"> TILLAGE SYSTEMS</style></keyword><keyword><style face="normal" font="default"> TIME</style></keyword><keyword><style face="normal" font="default"> water</style></keyword></keywords><dates><year Day="0" Month="0" Year="1998">1998</year></dates><abstract><style face="normal" font="default">Runoff and soil loss data were collected from seven cropping and tillage treatments over a 12-year period (1983-1994) from 28 (3.2 m wide by 27.4 m long) natural rainfall erosion plots located an a silt loam soil (Udollic Ochraqualf) near Kingdom City, MO. The treatments were continuous corn and soybean cropping under conventional, chisel and no-till tillage methods, and continuous cultivated fallow. Although cropping slightly influenced runoff and soil loss, the differences were not statistically significant (p less-than-or-equal-to 0.05). When averaged over tillage, mean annual runoff and soil loss from soybean were 3 and 12% higher than those from corn, respectively. Cropping effect on runoff was only significant (p less-than-or-equal-to 0.05) during the residue (P4) crop stage period. Most of the soil loss (approx 80% of the annual loss) occurred during the rough fallow (F) and seedbed (SB) periods. For these periods, cropping had no significant effect (p less-than-or-equal-to 0.05) on soil loss. Mean annual runoff and soil loss from continuous fallow were substantially greater compared to there from corn or soybean. Tillage, particularly no-till, had significant effects (p less-than-or-equal-to 0.05) on runoff and soil loss. When averaged over crop, no-till increased mean annual runoff by 14 and 20% compared to conventional and chisel, respectively. On the other hand, chisel decreased runoff by 5% compared to conventional. Soil loss from no-till method was 7 times lower than conventional and 5 times lower than chisel. Chisel lowered soil loss by 31% compared to conventional. The effects of tillage on runoff and soil loss were substantially greater during the F and SB cropstage periods. Overall, the study showed that (1) cropping had little effect on runoff and soil loss, and (2) no-till significantly increased runoff and substantially reduced soil loss when compared to the conventional method</style></abstract><notes><style face="normal" font="default">JArticleDiscipline: AGRICULTURE, SOIL Discipline: IENCE; ECOLOGY; WATER RESOURCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:000072528000015</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0089-ghidey.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>82</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kitchen,N.R.</style></author><author><style face="normal" font="default"> Hughes,D.E.</style></author><author><style face="normal" font="default"> Donald,W.W.</style></author><author><style face="normal" font="default"> Alberts,E.E.</style></author></authors></contributors><titles><title><style face="normal" font="default">Agrichemical movement in the root-zone of claypan soils: ridge- and mulch-tillage systems compared</style></title><secondary-title><style face="normal" font="default">Soil &amp; Tillage Research</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil &amp; Tillage Research</style></full-title></periodical><pages end="193" start="179">179-193</pages><volume><style face="normal" font="default">48</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">alachlor</style></keyword><keyword><style face="normal" font="default"> applications</style></keyword><keyword><style face="normal" font="default"> atrazine</style></keyword><keyword><style face="normal" font="default"> banding</style></keyword><keyword><style face="normal" font="default"> claypan soils</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> CORN ZEA-MAYS</style></keyword><keyword><style face="normal" font="default"> drainage</style></keyword><keyword><style face="normal" font="default"> farming systems</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> grain production</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> herbicide banding</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> hydrology</style></keyword><keyword><style face="normal" font="default"> leachate</style></keyword><keyword><style face="normal" font="default"> leaching</style></keyword><keyword><style face="normal" font="default"> losses</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> mass</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> NITRATE</style></keyword><keyword><style face="normal" font="default"> NITRATE MOVEMENT</style></keyword><keyword><style face="normal" font="default"> nitrate nitrogen</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword><keyword><style face="normal" font="default"> no-tillage</style></keyword><keyword><style face="normal" font="default"> pan lysimeter</style></keyword><keyword><style face="normal" font="default"> pans</style></keyword><keyword><style face="normal" font="default"> PLOTS</style></keyword><keyword><style face="normal" font="default"> QUALITY</style></keyword><keyword><style face="normal" font="default"> RAINFALL</style></keyword><keyword><style face="normal" font="default"> site-specific</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> SYSTEMS</style></keyword><keyword><style face="normal" font="default"> TIME</style></keyword><keyword><style face="normal" font="default"> timing</style></keyword><keyword><style face="normal" font="default"> Triticum aestivum</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword><keyword><style face="normal" font="default"> variation</style></keyword><keyword><style face="normal" font="default"> volume</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> water quality</style></keyword><keyword><style face="normal" font="default"> WATER-QUALITY</style></keyword><keyword><style face="normal" font="default"> yield losses</style></keyword><keyword><style face="normal" font="default"> Zea mays</style></keyword><keyword><style face="normal" font="default"> ZEA-MAYS</style></keyword></keywords><dates><year Day="0" Month="0" Year="1998">1998</year></dates><abstract><style face="normal" font="default">Climate, poor internal drainage in claypan soils, and cultural factors make it difficult to control agrichemical movement in the southern fringe of the Corn Belt, USA. Ridge- and mulch-tillage systems were evaluated for root-zone water quality and grain production on a claypan soil. In northcentral Missouri the Mexico silt lam (fine, montmorillonitic, mesic Udollic Ochraqualfs; FAO-Mollic Planosols) has a pronounced B-t horizon. Zero-tension pan lysimeters at 91 cm were used to monitor nitrate-nitrogen (NO3-N) and herbicide concentrations in three fanning systems: (I) a high chemical input mulch-tillage in a corn (Zea mays L.)-soybean [Glycine max (L.) Merr.] rotation (MTH); (2) a reduced chemical input with mulch-tillage in a corn-soybean-wheat (Triticum aestivum L.) rotation (MTR); (3) a reduced chemical input with ridge-tillage in a corn-soybean rotation (RTR). Farming system treatments were replicated three times with lysimeters placed in two replications. By band-applying herbicide over rows, herbicide mass applied to the MTR and RTR system was 50% less than applied to MTH, where herbicides were broadcast. Only marginal benefits to root-zone water quality could be attributed to this reduced herbicide input. Leachate water how volume and chemical concentration intercepted by the pans were influenced more by intrinsic, site-specific soil hydrology and year-to-year variation of rainfall intensity and timing than by the management. Root-zone leachate in both MTH and RTR farming systems in 1992 were below USEPA maximum contaminant levels (MCL) of 10 mg l(-1) for NO3-N and 3 mu g l(-1) for atrazine used for drinking water. Rainfall after herbicide application was more frequent and intense in 1993, but the extent of leaching was site-specific with significant variation among plots within all treatments. For example, maximum NO3-N and atrazine concentrations in leachate were 42 mg l(-1) and 100 mu g l(-1), respectively, in one MTH plot, and in second plot they were below 7 mg l(-1) and 2 mu g l(-1), respectively. High concentration variability also occurred between RTR plots. Nitrate-N and atrazine were consistently below their MCL on MTR plots. While herbicide movement and loss may be slightly reduced with banding, this management will have low adoption on claypan soils because of the yield-loss risks associated with the small time window allowed for field operations. The same risk is associated with split N applications. (C) 1998 Elsevier Science B.V. All rights reserved</style></abstract><notes><style face="normal" font="default">JArticleOCT 2Discipline: AGRICULTURE, SOIL Discipline: IENCE</style></notes><urls><web-urls><url ppv-ref="no">ISI:000076645500005</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0082-kitchen.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>198</rec-number><ref-type name="Book Chapter">3</ref-type><contributors><authors><author><style face="normal" font="default">Kremer,R.J.</style></author></authors><secondary-authors><author><style face="normal" font="default">Hatfield,J.L.</style></author><author><style face="normal" font="default"> Buhler,D.D.</style></author><author><style face="normal" font="default"> Stewart,B.A.</style></author></secondary-authors></contributors><titles><title><style face="normal" font="default">Microbial Interactions with Weed Seeds and Seedlings and Its Potential for Weed Management</style></title><alt-title><style face="normal" font="default">Integrated weed and soil management</style></alt-title></titles><periodical/><pages end="179" start="161">161-179</pages><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">management</style></keyword><keyword><style face="normal" font="default"> SEED</style></keyword><keyword><style face="normal" font="default"> SEEDLINGS</style></keyword><keyword><style face="normal" font="default"> SEEDS</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> weed management</style></keyword><keyword><style face="normal" font="default"> weed seeds</style></keyword><keyword><style face="normal" font="default"> WEED SEEDS AND SEEDLINGS</style></keyword></keywords><dates><year Day="0" Month="0" Year="1998">1998</year></dates><pub-location><style face="normal" font="default">Ann Arbor</style></pub-location><publisher><style face="normal" font="default">Ann Arbor Press</style></publisher><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0198-kremer.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>91</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lerch,R.N.</style></author><author><style face="normal" font="default"> Blanchard,P.E.</style></author><author><style face="normal" font="default"> Thurman,E.M.</style></author></authors></contributors><titles><title><style face="normal" font="default">Contribution of hydroxylated atrazine degradation products to the total atrazine load in midwestern streams</style></title><secondary-title><style face="normal" font="default">Environmental Science &amp; Technology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Environmental Science &amp; Technology</style></full-title></periodical><pages end="48" start="40">40-48</pages><volume><style face="normal" font="default">32</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">atrazine</style></keyword><keyword><style face="normal" font="default"> atrazine degradation products</style></keyword><keyword><style face="normal" font="default"> atrazine metabolites</style></keyword><keyword><style face="normal" font="default"> C-14 ATRAZINE</style></keyword><keyword><style face="normal" font="default"> CHROMATOGRAPHY MASS-SPECTROMETRY</style></keyword><keyword><style face="normal" font="default"> contamination</style></keyword><keyword><style face="normal" font="default"> DEETHYLATRAZINE</style></keyword><keyword><style face="normal" font="default"> deethylhydroxyatrazine</style></keyword><keyword><style face="normal" font="default"> degradation</style></keyword><keyword><style face="normal" font="default"> DEGRADATION PRODUCTS</style></keyword><keyword><style face="normal" font="default"> DEGRADATION-PRODUCTS</style></keyword><keyword><style face="normal" font="default"> DEISOPROPYLATRAZINE</style></keyword><keyword><style face="normal" font="default"> deisopropylhydroxyatrazine</style></keyword><keyword><style face="normal" font="default"> DESORPTION</style></keyword><keyword><style face="normal" font="default"> detection</style></keyword><keyword><style face="normal" font="default"> frequency</style></keyword><keyword><style face="normal" font="default"> HYDROXYATRAZINE</style></keyword><keyword><style face="normal" font="default"> LIQUID-CHROMATOGRAPHY</style></keyword><keyword><style face="normal" font="default"> metabolites</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> monitoring</style></keyword><keyword><style face="normal" font="default"> NEAR-SURFACE AQUIFERS</style></keyword><keyword><style face="normal" font="default"> SEDIMENT</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SOLID-PHASE EXTRACTION</style></keyword><keyword><style face="normal" font="default"> STATES</style></keyword><keyword><style face="normal" font="default"> stream sediments</style></keyword><keyword><style face="normal" font="default"> streams</style></keyword><keyword><style face="normal" font="default"> SUPERCRITICAL-FLUID EXTRACTION</style></keyword><keyword><style face="normal" font="default"> transport</style></keyword><keyword><style face="normal" font="default"> TRIAZINE HERBICIDES</style></keyword><keyword><style face="normal" font="default"> UNITED-STATES</style></keyword><keyword><style face="normal" font="default"> water</style></keyword></keywords><dates><year Day="0" Month="0" Year="1998">1998</year></dates><abstract><style face="normal" font="default">The contribution of hydroxylated atrazine degradation products (HADPs) to the total atrazine load (i.e., atrazine plus stable metabolites) in streams needs to be determined in order to fully assess the impact of atrazine contamination on stream ecosystems and human health. The objectives of this study were (1) to determine the contribution of HAD Ps to the total atrazine load in streams of nine midwestern states and (2) to discuss the mechanisms controlling the concentrations of HADPs in streams. Stream samples were collected from 95 streams in northern Missouri at preplant and postplant of 1994 and 1995, and an additional 46 streams were sampled in eight midwestern states at postplant of 1995. Samples were analyzed for atrazine, deethylatrazine (DEA), deisopropylatrazine (DIA), and three HADPs. Overall, HADP prevalence (i.e., frequency of detection) ranged from 87 to 100% for hydroxyatrazine (HA), 0 to 58% for deethylhydroxyatrazine (DEHA), and 0% for deisopropylhydroxyatrazine (DIHA) with method detection limits of 0.04-0.10 mu g L-1. Atrazine metabolites accounted for nearly 60% of the atrazine load in northern Missouri streams at preplant, with HA the predominant metabolite present. Data presented in this study and a continuous monitoring study are used to support the hypothesis that a combination of desorption from stream sediments and dissolved-phase transport control HADP concentrations in streams</style></abstract><notes><style face="normal" font="default">JArticleJAN 1Discipline: ENGINEERING, ENVIRONMENTAL; ENVIRONMENTAL Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:000071284200028</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0091-lerch.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>88</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Souissi,T.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">A rapid microplate callus bioassay for assessment of rhizobacteria for biocontrol of leafy spurge (Euphorbia esula L.)</style></title><secondary-title><style face="normal" font="default">Biocontrol Science and Technology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Biocontrol Science and Technology</style></full-title></periodical><pages end="92" start="83">83-92</pages><volume><style face="normal" font="default">8</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">biological weed control</style></keyword><keyword><style face="normal" font="default"> BIOLOGICAL-CONTROL</style></keyword><keyword><style face="normal" font="default"> callus tissue culture</style></keyword><keyword><style face="normal" font="default"> CULTURE</style></keyword><keyword><style face="normal" font="default"> Euphorbia esula</style></keyword><keyword><style face="normal" font="default"> GERMINATION</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> leafy spurge</style></keyword><keyword><style face="normal" font="default"> MICROORGANISMS</style></keyword><keyword><style face="normal" font="default"> PHYTOTOXICITY</style></keyword><keyword><style face="normal" font="default"> PLANT-GROWTH</style></keyword><keyword><style face="normal" font="default"> RHIZOBACTERIA</style></keyword><keyword><style face="normal" font="default"> rhizosphere bacteria</style></keyword><keyword><style face="normal" font="default"> SEED</style></keyword><keyword><style face="normal" font="default"> SEEDLINGS</style></keyword><keyword><style face="normal" font="default"> SEEDS</style></keyword><keyword><style face="normal" font="default"> species</style></keyword><keyword><style face="normal" font="default"> SYMPTOMS</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> weed management</style></keyword><keyword><style face="normal" font="default"> WEEDS</style></keyword></keywords><dates><year Day="0" Month="0" Year="1998">1998</year></dates><abstract><style face="normal" font="default">Screening large collections of microorganisms for potential biological control activity on economically important weeds is often difficult. Seeds required as indicator species are often not available in large supply and are highly variable in viability and germination, resulting in uneven seedling development. A bioassay system for rapidly assessing the phytotoxic effects of rhizobacteria was developed based on leafy spurge (Euphorbia esula L.) callus tissue culture in multiple-well plates. Callus pieces (0.5 g) were placed in 24-well plates containing Gamborg's B5 medium, inoculated with rhizobacterial suspension and incubated at 27 degrees C for 48 h. By rating inoculated callus for cellular damage, about 30% of rhizobacteria isolated from weedy Euophorbia spp. collected in Europe and North America were identified as being highly phytotoxic. Symptoms of phytotoxicity included growth reduction, discoloration and extensive cellular leakage. A high proportion of isolates found to be phytotoxic in tissue culture bioassays were similarly effective in standard leafy spurge seedling bioassays. The method is rapid, host specific and more uniform compared with assays using seedlings, and should be adaptable to other weed species for screening microorganisms for potential biocontrol activity</style></abstract><notes><style face="normal" font="default">JArticleMARDiscipline: BIOTECHNOLOGY &amp; APPLIED MICROBIOLOGY; ENTOMOLOGY</style></notes><urls><web-urls><url ppv-ref="no">ISI:000073227200008</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0088-souissi.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>335</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Wang,M.</style></author><author><style face="normal" font="default"> Hjelmfelt,A.T.</style></author></authors></contributors><titles><title><style face="normal" font="default">DEM based overland flow routing model</style></title><secondary-title><style face="normal" font="default">Journal of Hydrologic Engineering</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Hydrologic Engineering</style></full-title></periodical><pages end="8" start="1">1-8</pages><volume><style face="normal" font="default">3</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">DEM</style></keyword><keyword><style face="normal" font="default"> FLOW</style></keyword><keyword><style face="normal" font="default"> MODEL</style></keyword></keywords><dates><year Day="0" Month="0" Year="1998">1998</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0335-wang.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>93</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Blanchard,P.E.</style></author><author><style face="normal" font="default"> Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Herbicide contamination of groundwater beneath claypan soils in North-Central Missouri</style></title><secondary-title><style face="normal" font="default">Journal of Environmental Quality</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Environmental Quality</style></full-title></periodical><pages end="1621" start="1612">1612-1621</pages><volume><style face="normal" font="default">26</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">alachlor</style></keyword><keyword><style face="normal" font="default"> application rate</style></keyword><keyword><style face="normal" font="default"> atrazine</style></keyword><keyword><style face="normal" font="default"> claypan soils</style></keyword><keyword><style face="normal" font="default"> contamination</style></keyword><keyword><style face="normal" font="default"> DEETHYLATRAZINE</style></keyword><keyword><style face="normal" font="default"> degradation</style></keyword><keyword><style face="normal" font="default"> detection</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> FIELD EXPERIMENTS</style></keyword><keyword><style face="normal" font="default"> fields</style></keyword><keyword><style face="normal" font="default"> GLACIAL TILL</style></keyword><keyword><style face="normal" font="default"> groundwater</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> HYDRAULIC CONDUCTIVITY</style></keyword><keyword><style face="normal" font="default"> hydrology</style></keyword><keyword><style face="normal" font="default"> leaching</style></keyword><keyword><style face="normal" font="default"> LINKED-IMMUNOSORBENT-ASSAY</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> metabolites</style></keyword><keyword><style face="normal" font="default"> MIDWESTERN UNITED-STATES</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> NEAR-SURFACE AQUIFERS</style></keyword><keyword><style face="normal" font="default"> NORTH-CENTRAL MISSOURI</style></keyword><keyword><style face="normal" font="default"> RATES</style></keyword><keyword><style face="normal" font="default"> site-specific</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> SOLID-PHASE EXTRACTION</style></keyword><keyword><style face="normal" font="default"> timing</style></keyword><keyword><style face="normal" font="default"> TRIAZINE HERBICIDES</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword><keyword><style face="normal" font="default"> WATER-QUALITY</style></keyword><keyword><style face="normal" font="default"> watershed</style></keyword><keyword><style face="normal" font="default"> WELL WATER</style></keyword></keywords><dates><year Day="0" Month="0" Year="1997">1997</year></dates><abstract><style face="normal" font="default">The impact of hydrology and site-specific soil stratigraphy on herbicide leaching are not well understood for claypan soils. The claypan is a naturally-occurring argillic soil horizon that limits percolation to groundwater. The primary objective of this study was io determine the extent of nonpoint source herbicide contamination of shallow groundwater beneath claypan soils. The secondary objective was to determine the relative importance of hydrology and land management to observed herbicide contamination of groundwater during a 5-year period. The study site was the 7250 ha Goodwater Creek Watershed in north-central Missouri. Three cropped fields with 10 yr of similar management were instrumented with 20 to 25 monitor wells each in 1991. The three fields were treated with different rates of atrazine [2-chloro-(4-ethylamino)-6-(isopropylamino)-s-triazine] and alachlor [2-chloro-2',6'-diethyl-N-(methoxymethyl)acetanilide] and the wells were sampled quarterly from 1991 to 1996. Atrazine was detected in 7.2% of samples, with a maximum concentration of 0.12 mu g L-1 (limit of detection, LOD = 0.02 mu g L-1). Alachlor was detected in 0.4% of samples with a maximum concentration of 0.14 mu g L-1 (LOD = 0.11 mu g L-1). Site to site variability in hydrology was more important than differences in herbicide application rates, as the field treated with the least atrazine and alachlor had the most frequent detections of atrazine, the atrazine metabolite deethylatrazine [2-chloro-(4-amino)-6- (isopropylamino)-s-triazine; DEA], and the alachlor metabolite [2-[(2,6-diethylphenyl) (methoxymethyl)amino]-2-oxoethanesulfonic acid; ESA]. Groundwater recharge occurred primarily during the nongrowing season. Therefore, herbicide and metabolite leaching were limited by the extent of their degradation in the soil during the growing season. The study results demonstrate the importance of hydrologic variability, recharge timing, and chemical properties with respect to the leaching of herbicides and herbicide metabolites</style></abstract><notes><style face="normal" font="default">JArticleNOV-DECDiscipline: ENVIRONMENTAL Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:000071145600021</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0093-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>102</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Forcella,F.</style></author><author><style face="normal" font="default"> Wilson,R.G.</style></author><author><style face="normal" font="default"> Dekker,J.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Cardina,J.</style></author><author><style face="normal" font="default"> Anderson,R.L.</style></author><author><style face="normal" font="default"> Alm,D.</style></author><author><style face="normal" font="default"> Renner,K.A.</style></author><author><style face="normal" font="default"> Harvey,R.G.</style></author><author><style face="normal" font="default"> Clay,S.</style></author><author><style face="normal" font="default"> Buhler,D.D.</style></author></authors></contributors><titles><title><style face="normal" font="default">Weed seed bank emergence across the corn belt</style></title><secondary-title><style face="normal" font="default">Weed Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Science</style></full-title></periodical><pages end="76" start="67">67-76</pages><volume><style face="normal" font="default">45</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">Colorado</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> DATE</style></keyword><keyword><style face="normal" font="default"> DENSITY</style></keyword><keyword><style face="normal" font="default"> depth</style></keyword><keyword><style face="normal" font="default"> emergence prediction</style></keyword><keyword><style face="normal" font="default"> extraction</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> FIELD EXPERIMENTS</style></keyword><keyword><style face="normal" font="default"> GERMINATION</style></keyword><keyword><style face="normal" font="default"> HETEROGENEITY</style></keyword><keyword><style face="normal" font="default"> information</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> Minnesota</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> models</style></keyword><keyword><style face="normal" font="default"> Pennsylvania</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> POPULATION-DYNAMICS</style></keyword><keyword><style face="normal" font="default"> SEED</style></keyword><keyword><style face="normal" font="default"> seed dormancy</style></keyword><keyword><style face="normal" font="default"> SEEDLINGS</style></keyword><keyword><style face="normal" font="default"> SEEDS</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil depth</style></keyword><keyword><style face="normal" font="default"> species</style></keyword><keyword><style face="normal" font="default"> spring</style></keyword><keyword><style face="normal" font="default"> temperature</style></keyword><keyword><style face="normal" font="default"> tillage</style></keyword><keyword><style face="normal" font="default"> variation</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> weed seedlings</style></keyword><keyword><style face="normal" font="default"> weed seeds</style></keyword></keywords><dates><year Day="0" Month="0" Year="1997">1997</year></dates><abstract><style face="normal" font="default">Field experiments, conducted from 1991 to 1994, generated information on weed seedbank emergence for 22 site-years from Ohio to Colorado and Minnesota to Missouri. Early spring seedbank densities were estimated through direct extraction of viable seeds from soil cores. Emerged seedlings were recorded periodically, as were daily Values for air and soil temperature, and precipitation. Percentages of weed seedbanks that emerged as seedlings were calculated from seedbank and seedling data for each species, and relationships between seedbank emergence and microclimatic variables were sought. Fifteen species were found in 3 or more site-years. Average emergence percentages (and coefficients of variation) of these species were as follows: giant foxtail, 31.2 (84%); velvetleaf, 28.2 (66); kochia, 25.7 (79); Pennsylvania smartweed, 25.1 (65); common purslane, 15.4 (135); common ragweed, 15.0 (110); green foxtail, 8.5 (72); wild prose miller, 6.6 (104); hairy nightshade, 5.2 (62); common sunflower, 5.0 (26); yellow foxtail, 3.4 (67); pigweed species, 3.3 (103); common lambsquarters, 2.7 (111); wild buckwheat, 2.5 (63), and prostrate knot-weed, 0.6 (79). Variation among site-years, for some species, could be attributed to microclimate variables thought to induce secondary dormancy in spring. For example, total seasonal emergence percentage of giant foxtail was related positively to the Ist date at which average daily soil temperature at 5 to 10 cm soil depth reached 16 C. Thus, if soil warmed before mid April, secondary dormancy was induced and few seedlings emerged, whereas many seedlings emerged if soil remained cool until June</style></abstract><notes><style face="normal" font="default">JArticleJAN-FEBDiscipline: AGRONOMY; PLANT Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1997WT49100010</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0102-kremer.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>92</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Ghidey,F.</style></author><author><style face="normal" font="default"> Alberts,E.E.</style></author><author><style face="normal" font="default"> Lerch,R.N.</style></author></authors></contributors><titles><title><style face="normal" font="default">Spatial and temporal variability of herbicides in a claypan soil watershed</style></title><secondary-title><style face="normal" font="default">Journal of Environmental Quality</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Environmental Quality</style></full-title></periodical><pages end="1563" start="1555">1555-1563</pages><volume><style face="normal" font="default">26</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">alachlor</style></keyword><keyword><style face="normal" font="default"> atrazine</style></keyword><keyword><style face="normal" font="default"> CAPACITY</style></keyword><keyword><style face="normal" font="default"> cation exchange capacity</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> crop management</style></keyword><keyword><style face="normal" font="default"> depth</style></keyword><keyword><style face="normal" font="default"> distribution</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> losses</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> NORTH-CENTRAL MISSOURI</style></keyword><keyword><style face="normal" font="default"> organic matter</style></keyword><keyword><style face="normal" font="default"> ORGANIC-MATTER</style></keyword><keyword><style face="normal" font="default"> RAINFALL</style></keyword><keyword><style face="normal" font="default"> runoff</style></keyword><keyword><style face="normal" font="default"> sampling</style></keyword><keyword><style face="normal" font="default"> site-specific</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil depth</style></keyword><keyword><style face="normal" font="default"> soil pH</style></keyword><keyword><style face="normal" font="default"> spatial distribution</style></keyword><keyword><style face="normal" font="default"> SURFACE</style></keyword><keyword><style face="normal" font="default"> topography</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword><keyword><style face="normal" font="default"> watershed</style></keyword></keywords><dates><year Day="0" Month="0" Year="1997">1997</year></dates><abstract><style face="normal" font="default">The spatial and temporal variability of herbicides during the growing season were studied on a 35-ha watershed located in the claypan soil region of north-central Missouri, Soil samples were collected from the 0- to 5-cm soil depth in 1993, and 0- to 5-, 5- to 10-, and 10- to 15-cm soil depths in 1995 and analyzed for atrazine (2-chloro-4-ethylamino-6-isopropylamino-s-triazine and alachlor (2-chloro-N-(2,6-diethl-N-(methoxymethyl) acetanilide) concentrations, The effects of rainfall, topography, soil pH, cation exchange capacity (CEC), and organic matter (OM) content on the spatial distribution of herbicides were evaluated, There was no spatial dependency between samples taken immediately after herbicide application; however, spatial dependency was observed in the following sampling periods, During the year, &lt;2.5% of atrazine and 2.0% of alachlor applied to the soil was lost in runoff, and the movement of herbicides below the layer of application was also very low throughout the sampling period, Atrazine and alachlor concentrations in the soil decreased rapidly during the growing season, Concentrations measured 4 and 8 wk after application were &lt;20 and 5% for atrazine, and &lt;10 and 3% for alachlor, respectively, of those measured immediately after application, The study showed that the spatial and temporal variability of herbicide concentration was a function of the interaction between soil pH and the sorptive capacity of the soil (CEC and OM content), These findings are useful for site-specific crop management to increase the efficiency of herbicide application and also to reduce the loss of excess herbicides to surface runoff</style></abstract><notes><style face="normal" font="default">JArticleNOV-DECDiscipline: ENVIRONMENTAL Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:000071145600014</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0092-ghidey.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>104</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Ghidey,F.</style></author><author><style face="normal" font="default"> Alberts,E.E.</style></author></authors></contributors><titles><title><style face="normal" font="default">Plant root effects on soil erodibility, splash detachment, soil strength, and aggregate stability</style></title><secondary-title><style face="normal" font="default">Transactions of the Asae</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the Asae</style></full-title></periodical><pages end="135" start="129">129-135</pages><volume><style face="normal" font="default">40</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">agricultural engineering</style></keyword><keyword><style face="normal" font="default"> ALFALFA</style></keyword><keyword><style face="normal" font="default"> CANADA</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> crops</style></keyword><keyword><style face="normal" font="default"> depth</style></keyword><keyword><style face="normal" font="default"> EROSION</style></keyword><keyword><style face="normal" font="default"> IMPACT</style></keyword><keyword><style face="normal" font="default"> INTERRILL ERODIBILITY</style></keyword><keyword><style face="normal" font="default"> interrill erosion</style></keyword><keyword><style face="normal" font="default"> LOAM</style></keyword><keyword><style face="normal" font="default"> losses</style></keyword><keyword><style face="normal" font="default"> mass</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> RAINFALL</style></keyword><keyword><style face="normal" font="default"> rainfall simulator</style></keyword><keyword><style face="normal" font="default"> RESIDUE</style></keyword><keyword><style face="normal" font="default"> roots</style></keyword><keyword><style face="normal" font="default"> runoff</style></keyword><keyword><style face="normal" font="default"> SEDIMENT</style></keyword><keyword><style face="normal" font="default"> sediment concentration</style></keyword><keyword><style face="normal" font="default"> simulation</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SOIL LOSS</style></keyword><keyword><style face="normal" font="default"> soil properties</style></keyword><keyword><style face="normal" font="default"> soil strength</style></keyword><keyword><style face="normal" font="default"> soybean</style></keyword><keyword><style face="normal" font="default"> soybeans</style></keyword><keyword><style face="normal" font="default"> STEEPNESS</style></keyword><keyword><style face="normal" font="default"> stems</style></keyword><keyword><style face="normal" font="default"> strength</style></keyword></keywords><dates><year Day="0" Month="0" Year="1997">1997</year></dates><abstract><style face="normal" font="default">The influence of dead roots on soil erodibility, splash detachment, and aggregate stability was studied in the laboratory using a rainfall simulator on a Mexico silt loam (fine, montmorillnitic, mesic, Udollic Ochraqualf). Soil was collected from four cropping treatments including alfalfa, Canada bluegrass, corn, and soybeans. Rainfall of 64 mm h(-1) intensity was applied for 1 h during the first day. On the second day, a 30-min run of constant intensity (64 mm h(-1)) was applied which was followed by four 15-min stems at intensities of 25, 100, 50, and 75 mm h(-1). Dead root mass and dead root length in the 0- to 0.15-m depth from the perennial crops (alfalfa and bluegrass) were much higher than those from annual row crops (cent and soybean). There was almost a five-fold difference in root mass and root length between alfalfa and soybeans. The study showed that dead roots did not affect runoff but had significant effect (p &lt; 0.05) on soil loss and sediment concentrations. However the differences in soil loss and sediment concentrations were small relative to the differences in dead root mass and dead root length. Interrill erodibility (K-i) decreased as dead root mass and dead root length increased There were exponential relationships between K-i and dead root mass, and K-i and dead root length. Dead roots had significant effects (p &lt; 0.05) on soil shear strength, aggregate index, and dispersion ratio. Soil shear strength and aggregate index from alfalfa and Canada bluegrass were approximately 20 and 50%, respectively, higher than those from corn and soybean. Dispersion ratios from alfalfa and bluegrass were about 30% lower than those from corn and soybean. There was no significant difference (p &lt; 0.05) in soil splash among the crops. Splash detachment was highest during the initial 10 min of the simulation and then decreased exponentially</style></abstract><notes><style face="normal" font="default">JArticleJAN-FEBDiscipline: AGRICULTURAL ENGINEERING</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1997WP50700016</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0104-ghidey.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>97</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kitchen,N.R.</style></author><author><style face="normal" font="default"> Blanchard,P.E.</style></author><author><style face="normal" font="default"> Hughes,D.F.</style></author><author><style face="normal" font="default"> Lerch,R.N.</style></author></authors></contributors><titles><title><style face="normal" font="default">Impact of historical and current farming systems on groundwater nitrate in northern Missouri</style></title><secondary-title><style face="normal" font="default">Journal of Soil and Water Conservation</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Soil and Water Conservation</style></full-title></periodical><pages end="277" start="272">272-277</pages><volume><style face="normal" font="default">52</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">aquifers</style></keyword><keyword><style face="normal" font="default"> area</style></keyword><keyword><style face="normal" font="default"> ECOLOGY</style></keyword><keyword><style face="normal" font="default"> evaluation</style></keyword><keyword><style face="normal" font="default"> evaluation areas</style></keyword><keyword><style face="normal" font="default"> farming systems</style></keyword><keyword><style face="normal" font="default"> fertilizer</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> fields</style></keyword><keyword><style face="normal" font="default"> GLACIAL TILL</style></keyword><keyword><style face="normal" font="default"> groundwater</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> management systems</style></keyword><keyword><style face="normal" font="default"> Management Systems Evaluation Areas</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> N-fertilizer</style></keyword><keyword><style face="normal" font="default"> NITRATE</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword><keyword><style face="normal" font="default"> QUALITY</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> spring</style></keyword><keyword><style face="normal" font="default"> storage</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> SYSTEMS</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> WATER-QUALITY</style></keyword></keywords><dates><year Day="0" Month="0" Year="1997">1997</year></dates><abstract><style face="normal" font="default">A major objective of the Management Systems Evaluation Areas (MSEA) Project has been to assess farming system impact on NO3-N concentrations in shallow aquifers. In Missouri our interest was to assess farming systems on the claypan soil/glacial aquifer. Three fields were selected and instrumented with groundwater welts in the spring of 1991. Wells were sampled quarterly and analyzed for NO3-N. Average NO3-N concentration since 1991 was 7 mg l(-1), but 25% of the wells had NO3-N in excess of 10 mg l(-1). In one field, NO3 concentrations were much higher and are still decreasing after apparently receiving excess nitrogen (N) from manure and N fertilizer before 1980. Long-term N management has long-term impacts on groundwater quality in this aquifer. Current farming systems are probably affecting groundwater quality: but, because of the glacial till's apparent buffer for NO3 storage, groundwater NO3 concentration changes are slow</style></abstract><notes><style face="normal" font="default">JArticleJUL-AUGDiscipline: AGRICULTURE, SOIL Discipline: IENCE; ECOLOGY; WATER RESOURCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1997XN13600011</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0097-kitchen.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>101</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lerch,R.N.</style></author><author><style face="normal" font="default"> Thurman,E.M.</style></author><author><style face="normal" font="default"> Kruger,E.L.</style></author></authors></contributors><titles><title><style face="normal" font="default">Mixed-mode sorption of hydroxylated atrazine degradation products to soil: A mechanism for bound residue</style></title><secondary-title><style face="normal" font="default">Environmental Science &amp; Technology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Environmental Science &amp; Technology</style></full-title></periodical><pages end="1546" start="1539">1539-1546</pages><volume><style face="normal" font="default">31</style></volume><number><style face="normal" font="default">5</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">atrazine</style></keyword><keyword><style face="normal" font="default"> atrazine degradation products</style></keyword><keyword><style face="normal" font="default"> BOUND RESIDUE</style></keyword><keyword><style face="normal" font="default"> chromatography</style></keyword><keyword><style face="normal" font="default"> deethylhydroxyatrazine</style></keyword><keyword><style face="normal" font="default"> degradation</style></keyword><keyword><style face="normal" font="default"> DEGRADATION PRODUCTS</style></keyword><keyword><style face="normal" font="default"> DEGRADATION-PRODUCTS</style></keyword><keyword><style face="normal" font="default"> deisopropylhydroxyatrazine</style></keyword><keyword><style face="normal" font="default"> extraction</style></keyword><keyword><style face="normal" font="default"> HERBICIDE ATRAZINE</style></keyword><keyword><style face="normal" font="default"> high performance liquid chromatography</style></keyword><keyword><style face="normal" font="default"> HYDROXYATRAZINE</style></keyword><keyword><style face="normal" font="default"> LIQUID-CHROMATOGRAPHY</style></keyword><keyword><style face="normal" font="default"> metolachlor</style></keyword><keyword><style face="normal" font="default"> mixed-mode sorption</style></keyword><keyword><style face="normal" font="default"> PERFORMANCE LIQUID-CHROMATOGRAPHY</style></keyword><keyword><style face="normal" font="default"> PESTICIDE-RESIDUES</style></keyword><keyword><style face="normal" font="default"> RESIDUE</style></keyword><keyword><style face="normal" font="default"> RESIDUES</style></keyword><keyword><style face="normal" font="default"> S-TRIAZINES</style></keyword><keyword><style face="normal" font="default"> SAMPLES</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> SOLID-PHASE EXTRACTION</style></keyword><keyword><style face="normal" font="default"> sorption</style></keyword></keywords><dates><year Day="0" Month="0" Year="1997">1997</year></dates><abstract><style face="normal" font="default">This study tested the hypothesis that sorption of hydroxylated atrazine degradation products (HADPs: hydroxyatrazine, HA; deethylhydroxyatrazine, DEHA; and deisopropylhydroxyatrazine, DIHA) to soils occurs by mixed-mode binding resulting from two simultaneous mechanisms: (1) cation exchange and (2) hydrophobic interaction. The objective was to use liquid chromatography and soil extraction experiments to show that mixed-mode binding is the mechanism controlling HADP sorption to soils and is also a mechanism for bound residue. Overall, HADP binding to solid-phase extraction (SPE) sorbents occurred in the order: cation exchange much greater than octadecyl (C-18) much greater than cyanopropyl. Binding to cation exchange SPE and to a high-performance liquid chromatography octyl (C-8) column showed evidence for mixed-mode binding. Comparison of soil extracted by 0.5 M KH2PO4, pH 7.5, or 25% aqueous CH3CN showed that, for HA and DIHA, cation exchange was a more important binding mechanism to soils than hydrophobic interaction. Based on differences between several extractants, the extent of HADP mixed-mode binding to soil occurred in the following order: HA > DIHA > DEHA. Mixed-mode extraction recovered 42.8% of bound atrazine residues from aged soil, and 88% of this fraction was identified as HADPs. Thus, a significant portion of bound atrazine residues in soils is sorbed by the mixed-mode binding mechanisms</style></abstract><notes><style face="normal" font="default">JArticleMAYDiscipline: ENGINEERING, ENVIRONMENTAL; ENVIRONMENTAL Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1997WW94800057</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0101-lerch.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>223</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Souissi,T.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> White,J.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Scanning and transmission electron microscopy of root colonization of leafy spurge (euphorbia esula l.) seedlings by rhizobacteria</style></title><secondary-title><style face="normal" font="default">Phytomorphology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Phytomorphology</style></full-title></periodical><pages end="193" start="177">177-193</pages><volume><style face="normal" font="default">47</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">electron microscopy</style></keyword><keyword><style face="normal" font="default"> ROOT</style></keyword><keyword><style face="normal" font="default"> colonization</style></keyword><keyword><style face="normal" font="default"> leafy spurge</style></keyword><keyword><style face="normal" font="default"> Euphorbia esula</style></keyword><keyword><style face="normal" font="default"> EUPHORBIA-ESULA</style></keyword><keyword><style face="normal" font="default"> SEEDLINGS</style></keyword><keyword><style face="normal" font="default"> RHIZOBACTERIA</style></keyword></keywords><dates><year Day="0" Month="0" Year="1997">1997</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0223-kremer.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>267</rec-number><ref-type name="Book Chapter">3</ref-type><contributors><authors><author><style face="normal" font="default">Sudduth,K.A.</style></author><author><style face="normal" font="default"> Hummel,J.W.</style></author><author><style face="normal" font="default"> Birrell,S.J.</style></author></authors><secondary-authors><author><style face="normal" font="default">Pierce,F.J.</style></author><author><style face="normal" font="default"> Sadler,E.J.</style></author></secondary-authors></contributors><titles><title><style face="normal" font="default">Sensors for site-specific management</style></title><alt-title><style face="normal" font="default">The State of Site-Specific Management for Agriculture</style></alt-title></titles><periodical/><pages end="210" start="183">183-210</pages><number><style face="normal" font="default">10</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">sensors</style></keyword><keyword><style face="normal" font="default"> sensor</style></keyword><keyword><style face="normal" font="default"> site-specific</style></keyword><keyword><style face="normal" font="default"> site-specific management</style></keyword><keyword><style face="normal" font="default"> site specific management</style></keyword><keyword><style face="normal" font="default"> management</style></keyword></keywords><dates><year Day="0" Month="0" Year="1997">1997</year></dates><pub-location><style face="normal" font="default">Madison, WI</style></pub-location><publisher><style face="normal" font="default">ASA-CSSA-SSSA</style></publisher><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0267-sudduth.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>118</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Birrell,S.J.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Borgelt,S.C.</style></author></authors></contributors><titles><title><style face="normal" font="default">Comparison of sensors and techniques for crop yield mapping</style></title><secondary-title><style face="normal" font="default">Computers and Electronics in Agriculture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Computers and Electronics in Agriculture</style></full-title></periodical><pages end="233" start="215">215-233</pages><volume><style face="normal" font="default">14</style></volume><number><style face="normal" font="default">2-3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">accuracy</style></keyword><keyword><style face="normal" font="default"> applications</style></keyword><keyword><style face="normal" font="default"> COMBINE</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> crop management</style></keyword><keyword><style face="normal" font="default"> crop yield</style></keyword><keyword><style face="normal" font="default"> evaluation</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> FLOW</style></keyword><keyword><style face="normal" font="default"> kriging</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> mapping</style></keyword><keyword><style face="normal" font="default"> maps</style></keyword><keyword><style face="normal" font="default"> models</style></keyword><keyword><style face="normal" font="default"> precision agriculture</style></keyword><keyword><style face="normal" font="default"> sensor</style></keyword><keyword><style face="normal" font="default"> sensors</style></keyword><keyword><style face="normal" font="default"> site-specific</style></keyword><keyword><style face="normal" font="default"> TIME</style></keyword><keyword><style face="normal" font="default"> variation</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> yield map</style></keyword><keyword><style face="normal" font="default"> yield mapping</style></keyword><keyword><style face="normal" font="default"> yield monitor</style></keyword><keyword><style face="normal" font="default"> yields</style></keyword></keywords><dates><year Day="0" Month="0" Year="1996">1996</year></dates><abstract><style face="normal" font="default">The implementation of site-specific crop management is dependent on the variations in yield and yield potential within a field. Crop yield maps are important for both the implementation and evaluation of site-specific crop management strategies. Management decisions and evaluations based on yield maps must take into consideration the accuracy and resolution of the maps. An impact-based yield monitor and a volumetric yield monitor were compared. The effect of different dynamic models of combine grain flow on the calculated instantaneous yields were investigated. Both simple time delay models and first order models could be used to model the grain flow. In general, a simple time delay model with minimal smoothing provided the best yield maps. Yield maps developed using different methods of Kriging and other mapping techniques were compared. The maps showed the same general trends. However, localized yield features were represented differently due to the methods used for developing the maps and the degree of smoothing</style></abstract><notes><style face="normal" font="default">JArticleFEBDiscipline: AGRICULTURE, MULTIDIDiscipline: IPLINARY; COMPUTER Discipline: IENCE, INTERDIDiscipline: IPLINARY APPLICATIONS</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1996TY15800009</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0118-birrell.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>271</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Borgelt,S.C.</style></author><author><style face="normal" font="default"> Harrison,J.D.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Birrell,S.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Evaluation of GPS for Applications in Precision Agriculture</style></title><secondary-title><style face="normal" font="default">Applied Engineering in Agriculture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Applied Engineering in Agriculture</style></full-title></periodical><pages end="638" start="633">633-638</pages><volume><style face="normal" font="default">12</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">evaluation</style></keyword><keyword><style face="normal" font="default"> GPS</style></keyword><keyword><style face="normal" font="default"> applications</style></keyword><keyword><style face="normal" font="default"> precision agriculture</style></keyword></keywords><dates><year Day="0" Month="0" Year="1996">1996</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0271-borgelt.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>116</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author><author><style face="normal" font="default"> Khan,M.</style></author></authors></contributors><titles><title><style face="normal" font="default">Canada thistle (Cirsium arvense) effects on yield components of spring wheat (Triticum aestivum)</style></title><secondary-title><style face="normal" font="default">Weed Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Science</style></full-title></periodical><pages end="121" start="114">114-121</pages><volume><style face="normal" font="default">44</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">BROME</style></keyword><keyword><style face="normal" font="default"> CANADA</style></keyword><keyword><style face="normal" font="default"> Canada thistle</style></keyword><keyword><style face="normal" font="default"> Cirsium arvense (L) CIRAR wheat</style></keyword><keyword><style face="normal" font="default"> competition</style></keyword><keyword><style face="normal" font="default"> correlation</style></keyword><keyword><style face="normal" font="default"> crop yield</style></keyword><keyword><style face="normal" font="default"> DENSITY</style></keyword><keyword><style face="normal" font="default"> efficacy</style></keyword><keyword><style face="normal" font="default"> EMERGENCE</style></keyword><keyword><style face="normal" font="default"> INTERFERENCE</style></keyword><keyword><style face="normal" font="default"> path correlation analysis</style></keyword><keyword><style face="normal" font="default"> PATH-ANALYSIS</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> RELATIVE-TIME</style></keyword><keyword><style face="normal" font="default"> SEED</style></keyword><keyword><style face="normal" font="default"> seed weight</style></keyword><keyword><style face="normal" font="default"> spring</style></keyword><keyword><style face="normal" font="default"> tillering</style></keyword><keyword><style face="normal" font="default"> Triticum aestivum</style></keyword><keyword><style face="normal" font="default"> Triticum aestivum L</style></keyword><keyword><style face="normal" font="default"> WEED DENSITY</style></keyword><keyword><style face="normal" font="default"> WHEAT</style></keyword><keyword><style face="normal" font="default"> WHEAT YIELD</style></keyword><keyword><style face="normal" font="default"> WINTER-WHEAT</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> yield components</style></keyword></keywords><dates><year Day="0" Month="0" Year="1996">1996</year></dates><abstract><style face="normal" font="default">The effect of Canada thistle on major yield components of spring wheat was characterized using path coefficient analysis, which provides insight concerning which yield components are most sensitive to Canada thistle competition. Increasing Canada thistle density decreased wheat stand in each of three years. Canada thistle also reduced spikes per plant and seed per spike to varying extents depending on year, but Canada thistle had comparatively little effect on wheat seed weight per 1000 seed. In the path coefficient model proposed, Canada thistle was assumed to reduce yield by directly reducing wheat yield components and through them, indirectly reducing yield. Path coefficient correlation analysis showed that Canada thistle reduced spring wheat yield chiefly by indirect effects of decreasing wheat density, the earliest formed yield component. Canada thistle reduced wheat density which, in turn, reduced wheat yield. These data suggest that Canada thistle must be controlled either before or shortly after wheat emergence if detrimental effects on wheat yield are to be minimized</style></abstract><notes><style face="normal" font="default">JArticleJAN-MARDiscipline: AGRONOMY; PLANT Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1996UA33100018</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0116-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>108</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Ghidey,F.</style></author><author><style face="normal" font="default"> Alberts,E.E.</style></author></authors></contributors><titles><title><style face="normal" font="default">Comparison of measured and WEPP predicted runoff and soil loss for midwest claypan soil</style></title><secondary-title><style face="normal" font="default">Transactions of the Asae</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the Asae</style></full-title></periodical><pages end="1402" start="1395">1395-1402</pages><volume><style face="normal" font="default">39</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">agricultural engineering</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> cropping system</style></keyword><keyword><style face="normal" font="default"> cropping systems</style></keyword><keyword><style face="normal" font="default"> EROSION</style></keyword><keyword><style face="normal" font="default"> fallow</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> losses</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> no-till</style></keyword><keyword><style face="normal" font="default"> PLOTS</style></keyword><keyword><style face="normal" font="default"> prediction</style></keyword><keyword><style face="normal" font="default"> RAINFALL</style></keyword><keyword><style face="normal" font="default"> RESIDUE</style></keyword><keyword><style face="normal" font="default"> runoff</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SOIL LOSS</style></keyword><keyword><style face="normal" font="default"> soybean</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> SYSTEMS</style></keyword><keyword><style face="normal" font="default"> tillage</style></keyword><keyword><style face="normal" font="default"> TILLAGE SYSTEMS</style></keyword><keyword><style face="normal" font="default"> water</style></keyword></keywords><dates><year Day="0" Month="0" Year="1996">1996</year></dates><abstract><style face="normal" font="default">Runoff and soil loss predictions from the Water Erosion Prediction Project (WEPP) Hillslope model were compared to measured losses from continuous cultivated fallow and continuous corn and soybean cropping systems under conventional, chisel, and no-till tillage methods. Runoff and soil loss data were collected over an 11-yr period (1983-1993) from the study plots on Mexico claypan soil near Kingdom City, Missouri. For all treatments, the model predicted runoff and soil loss reasonably well for the wet years with annual runoff >200 mm but greatly underpredicted for the dry years with annual runoff &lt;100 mm. During the dry seasons, most of the rainfall events occurred after a long dry period and the model overestimated runoff from several events when little or no runoff was measured. When averaged by tillage treatment, mean annual runoff predictions for continuous corn and continuous soybean were within 15% of those measured. The model overpredicted soil losses from continuous corn and continuous soybean by 22 and 87%, respectively. Both measured and predicted runoff and soil losses from continuous soybean were higher than from continuous corn. When averaged over crop, the model slightly overpredicted mean annual runoff for conventional, chisel, and no-till systems. The model did not show appreciable difference in annual runoff prediction for the different tillage systems. Predicted soil losses for conventional, chisel, and no-till tillage systems were 50, 67, and 29% higher, respectively, than those measured. Runoff and soil loss data were also analyzed by cropstage periods. A tillage year was divided into rough fallow (F), seedbed (SE), rapid growth (P12), reproduction and maturation (P3), and residue (P4) periods. Runoff predictions for the F and SE period were reasonable. The model overpredicted runoff for the P12 and P3 periods and underpredicted for the P4 period. The model overpredicted soil loss from all periods except for the F period For continuous corn and soybean cropping systems, more than 50% of the total measured and predicted tillage year soil loss occurred during the SE period. The model was also tested for seven large events that occurred during the study period Predicted runoff and soil loss for these events compared well to those measured</style></abstract><notes><style face="normal" font="default">JArticleJUL-AUGDiscipline: AGRICULTURAL ENGINEERING</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1996VF22300016</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0108-ghidey.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>117</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Hummel,J.W.</style></author><author><style face="normal" font="default"> Gaultney,L.D.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Soil property sensing for site-specific crop management</style></title><secondary-title><style face="normal" font="default">Computers and Electronics in Agriculture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Computers and Electronics in Agriculture</style></full-title></periodical><pages end="136" start="121">121-136</pages><volume><style face="normal" font="default">14</style></volume><number><style face="normal" font="default">2-3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">agrochemicals</style></keyword><keyword><style face="normal" font="default"> applications</style></keyword><keyword><style face="normal" font="default"> calibration</style></keyword><keyword><style face="normal" font="default"> CAPACITY</style></keyword><keyword><style face="normal" font="default"> carbon</style></keyword><keyword><style face="normal" font="default"> cation exchange capacity</style></keyword><keyword><style face="normal" font="default"> color</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> crop management</style></keyword><keyword><style face="normal" font="default"> depth</style></keyword><keyword><style face="normal" font="default"> depth-to-claypan</style></keyword><keyword><style face="normal" font="default"> fertilizer</style></keyword><keyword><style face="normal" font="default"> fertilizers</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> LANDSCAPE POSITION</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> MOISTURE</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword><keyword><style face="normal" font="default"> organic matter</style></keyword><keyword><style face="normal" font="default"> ORGANIC-MATTER</style></keyword><keyword><style face="normal" font="default"> ORGANIC-MATTER CONTENT</style></keyword><keyword><style face="normal" font="default"> position</style></keyword><keyword><style face="normal" font="default"> pressure</style></keyword><keyword><style face="normal" font="default"> reflectance</style></keyword><keyword><style face="normal" font="default"> sensing</style></keyword><keyword><style face="normal" font="default"> sensor</style></keyword><keyword><style face="normal" font="default"> sensors</style></keyword><keyword><style face="normal" font="default"> site-specific</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil moisture</style></keyword><keyword><style face="normal" font="default"> soil nitrate</style></keyword><keyword><style face="normal" font="default"> soil organic matter</style></keyword><keyword><style face="normal" font="default"> soil properties</style></keyword><keyword><style face="normal" font="default"> soil types</style></keyword><keyword><style face="normal" font="default"> SOIL-MOISTURE</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> technology</style></keyword><keyword><style face="normal" font="default"> TIME</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> yields</style></keyword></keywords><dates><year Day="0" Month="0" Year="1996">1996</year></dates><abstract><style face="normal" font="default">Site-specific crop management (SSCM) aims to improve production efficiency by adjusting crop inputs, especially fertilizers and agro-chemicals, to varying local conditions within a field. Sensors are needed to obtain site-specific data on factors affecting crop growth and yields, such as nutrient status, weed pressure, soil moisture status, landscape position, soil organic matter (SOM) content, soil acidity, and depth to a restrictive layer. Two SOM sensors have been licensed for commercial development: (1) a single-wavelength sensor that must be recalibrated for the soils and moisture conditions that prevail at the time of use, and (2) a multiple-wavelength sensor which can utilize a single calibration to predict SOM over a range of soil moistures and a range of soil types that occur within a geographical range of several hundreds of kilometers. The single-wavelength sensor requires operator acceptance of the need for frequent recalibration, but is relatively inexpensive and rugged. The multiple-wavelength sensor uses a single calibration applicable over a broader range of soil types and soil moistures, and can also be used to sense soil moisture and cation exchange capacity (CEC), but uses complex technology. A simple inexpensive sensor that can classify soils according to soil moisture has also been developed. Sensors for other soil parameters are being sought, and progress has been reported on nutrient and depth-to-claypan sensing</style></abstract><notes><style face="normal" font="default">JArticleFEBDiscipline: AGRICULTURE, MULTIDIDiscipline: IPLINARY; COMPUTER Discipline: IENCE, INTERDIDiscipline: IPLINARY APPLICATIONS</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1996TY15800003</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0117-hummel.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>114</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Khan,M.</style></author><author><style face="normal" font="default"> Donald,W.W.</style></author><author><style face="normal" font="default"> Prato,T.</style></author></authors></contributors><titles><title><style face="normal" font="default">Spring wheat (Triticum aestivum) management can substitute for diclofop for foxtail (Setaria spp) control</style></title><secondary-title><style face="normal" font="default">Weed Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Science</style></full-title></periodical><pages end="372" start="362">362-372</pages><volume><style face="normal" font="default">44</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">competition</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> crop management</style></keyword><keyword><style face="normal" font="default"> crop yield</style></keyword><keyword><style face="normal" font="default"> DATE</style></keyword><keyword><style face="normal" font="default"> diclofop</style></keyword><keyword><style face="normal" font="default"> economics</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> GREEN</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> MANAGEMENT-PRACTICES</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> planting</style></keyword><keyword><style face="normal" font="default"> POPULATIONS</style></keyword><keyword><style face="normal" font="default"> RATES</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> seeding date</style></keyword><keyword><style face="normal" font="default"> seeding rate</style></keyword><keyword><style face="normal" font="default"> SOIL-MOISTURE</style></keyword><keyword><style face="normal" font="default"> spring</style></keyword><keyword><style face="normal" font="default"> stochastic dominance</style></keyword><keyword><style face="normal" font="default"> STOCHASTIC-DOMINANCE ANALYSIS</style></keyword><keyword><style face="normal" font="default"> sustainable agriculture</style></keyword><keyword><style face="normal" font="default"> tillage</style></keyword><keyword><style face="normal" font="default"> Triticum aestivum</style></keyword><keyword><style face="normal" font="default"> VIRIDIS</style></keyword><keyword><style face="normal" font="default"> WHEAT</style></keyword><keyword><style face="normal" font="default"> WHEAT YIELD</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> yields</style></keyword></keywords><dates><year Day="0" Month="0" Year="1996">1996</year></dates><abstract><style face="normal" font="default">The goal of this research was to determine whether crop management practices could substitute for a herbicide for managing mixed populations of green and yellow foxtail in hard red spring wheat. Crop yield and foxtail growth were measured in two years of field research in North Dakota. Spring wheat yields were as great or greater when early seeding date or 2x seeding rate were substituted for POST diclofop(3) at 0.75 kg al ha(-1) for managing foxtail in spring wheat, Yield of spring wheat competing with foxtails was greater for the high seeding rate (2x = 270 kg ha(-1)) than both the normal (Ix = 130 kg ha(-1)) and low (0,5x = 70 k ha(-1)) seeding rates for early or middle seeding dates, but not for the late seeding date, For both early and middle seeding dates, wheat yield at the 2x seeding rate without diclofop was equal to or greater than that of the Ix seeding rate with diclofop, Late-seeded wheat did not yield well in competition with dense foxtail stands for any treatment combination, Early and middle seeding dates favored the relative increase of green foxtail over yellow foxtail in wheat, whereas late seeding favored yellow foxtail over green foxtail, Economic analysis demonstrated that early seeding date was the most critical factor in determining the stochastic dominance of treatments without diclofop over treatments with diclofop. Seeding rate was much less important than seeding date in determining the ranking of treatments in stochastic dominance analysis</style></abstract><notes><style face="normal" font="default">JArticleAPR-JUNDiscipline: AGRONOMY; PLANT Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1996UL53900023</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0114-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>111</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kitchen,N.R.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Drummond,S.T.</style></author></authors></contributors><titles><title><style face="normal" font="default">Mapping of sand deposition from 1993 midwest floods with electromagnetic induction measurements</style></title><secondary-title><style face="normal" font="default">Journal of Soil and Water Conservation</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Soil and Water Conservation</style></full-title></periodical><pages end="340" start="336">336-340</pages><volume><style face="normal" font="default">51</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">calibration</style></keyword><keyword><style face="normal" font="default"> depth</style></keyword><keyword><style face="normal" font="default"> ECOLOGY</style></keyword><keyword><style face="normal" font="default"> ELECTRICAL-CONDUCTIVITY</style></keyword><keyword><style face="normal" font="default"> electromagnetic induction</style></keyword><keyword><style face="normal" font="default"> floods</style></keyword><keyword><style face="normal" font="default"> global positioning system</style></keyword><keyword><style face="normal" font="default"> GPS</style></keyword><keyword><style face="normal" font="default"> information</style></keyword><keyword><style face="normal" font="default"> mapping</style></keyword><keyword><style face="normal" font="default"> maps</style></keyword><keyword><style face="normal" font="default"> measurement</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> RIVER</style></keyword><keyword><style face="normal" font="default"> sand</style></keyword><keyword><style face="normal" font="default"> sensing</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> water</style></keyword></keywords><dates><year Day="0" Month="0" Year="1996">1996</year></dates><abstract><style face="normal" font="default">Sand deposition on river-bottom farmland was extensive from the 1993 Midwest floods. A technique coupling electromagnetic induction (EM) ground conductivity sensing and Global Positioning System (GPS) location data was wed to map sand deposition depth at four sites in Missouri along the Missouri River. A strong relationship between EM redding and probe-measured depth of sand deposition (r(2) values between 0.73-0.94) was found. This relationship differed significantly between sites, so calibration by ground-truthing was required for each sand deposition survey. An example of the sand deposition mapping wing the EM/GPS system is shown for two 50-60 ha (125-150 ac) sites. Such maps can provide valuable detailed information for developing restoration plans for land affected by 1993 Midwest floods</style></abstract><notes><style face="normal" font="default">JArticleJUL-AUGDiscipline: AGRICULTURE, SOIL Discipline: IENCE; ECOLOGY; WATER RESOURCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1996UV35100017</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0111-kitchen.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>113</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kremer,R.J.</style></author><author><style face="normal" font="default"> Sasseville,D.N.</style></author><author><style face="normal" font="default"> Mills,H.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Promotion of phytotoxic bacteria in rhizospheres of leatherleaf fern by Benlate DF</style></title><secondary-title><style face="normal" font="default">Journal of Plant Nutrition</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Plant Nutrition</style></full-title></periodical><pages end="953" start="939">939-953</pages><volume><style face="normal" font="default">19</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">BACTERIA</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> FLUORESCENT PSEUDOMONADS</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> PATHOGENS</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> PLANT-GROWTH</style></keyword><keyword><style face="normal" font="default"> pseudomonads</style></keyword><keyword><style face="normal" font="default"> RHIZOBACTERIA</style></keyword><keyword><style face="normal" font="default"> rhizosphere</style></keyword><keyword><style face="normal" font="default"> rhizosphere bacteria</style></keyword><keyword><style face="normal" font="default"> roots</style></keyword><keyword><style face="normal" font="default"> SEEDLINGS</style></keyword><keyword><style face="normal" font="default"> SYMPTOMS</style></keyword></keywords><dates><year Day="0" Month="0" Year="1996">1996</year></dates><abstract><style face="normal" font="default">Foliar damage symptoms to leatherleaf fern (Rumohra adiantiformis [Forst.] Ching) in Florida during widespread use of the fungicide Benlate DF could not be attributed to nutrition, cultural practices, environmental conditions, or new pathogens developing on the crop. The objective of this study was to assess the involvement of rhizosphere bacteria in the damage symptoms using bioassays to detect phytotoxic activity. Rhizosphere bacteria were cultured from rhizospheres of leatherleaf ferns sampled from ferneries where Benlate DF was routinely applied and from check ferneries not receiving the fungicide. Using a lettuce seedling bioassay, the proportion of rhizosphere bacteria that was plant growth-inhibitory ranged from 7.5% and 11% for isolates from two check ferneries to 70% for those from a fernery previously treated with Benlate DF. Rhizosphere bacteria originating from Benlate DF-treated leatherleaf ferns caused most severe damage on seedlings with some isolates reducing root growth 70% compared to control seedlings. Other symptoms induced by these bacteria, which were mainly fluorescent and nonfluorescent pseudomonads, included necroses and inhibition of root hair development. Results suggested that Benlate DF affected the composition of bacteria in leatherleaf fern rhizospheres by promoting a bacterial component with phytotoxic properties toward plant growth</style></abstract><notes><style face="normal" font="default">JArticleDiscipline: PLANT Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1996UU95900009</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0113-kremer.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>109</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kremer,R.J.</style></author><author><style face="normal" font="default"> Kennedy,A.C.</style></author></authors></contributors><titles><title><style face="normal" font="default">Rhizobacteria as biocontrol agents of weeds</style></title><secondary-title><style face="normal" font="default">Weed Technology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Technology</style></full-title></periodical><pages end="609" start="601">601-609</pages><volume><style face="normal" font="default">10</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">BACTERIA</style></keyword><keyword><style face="normal" font="default"> BIOCONTROL AGENTS</style></keyword><keyword><style face="normal" font="default"> biological control</style></keyword><keyword><style face="normal" font="default"> BIOLOGICAL-CONTROL</style></keyword><keyword><style face="normal" font="default"> biomass</style></keyword><keyword><style face="normal" font="default"> characterization</style></keyword><keyword><style face="normal" font="default"> competition</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> crops</style></keyword><keyword><style face="normal" font="default"> DELETERIOUS RHIZOBACTERIA</style></keyword><keyword><style face="normal" font="default"> DENSITY</style></keyword><keyword><style face="normal" font="default"> DOWNY BROME</style></keyword><keyword><style face="normal" font="default"> ECOLOGY</style></keyword><keyword><style face="normal" font="default"> efficacy</style></keyword><keyword><style face="normal" font="default"> EUPHORBIA-ESULA</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> formulations</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> growth suppression</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> INHIBITORY PSEUDOMONADS</style></keyword><keyword><style face="normal" font="default"> integrated weed management</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> MANAGEMENT-PRACTICES</style></keyword><keyword><style face="normal" font="default"> microbial ecology</style></keyword><keyword><style face="normal" font="default"> MICROORGANISMS</style></keyword><keyword><style face="normal" font="default"> phytotoxins</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> PLANT-GROWTH</style></keyword><keyword><style face="normal" font="default"> Pseudomonas spp</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> RESIDUE</style></keyword><keyword><style face="normal" font="default"> RHIZOBACTERIA</style></keyword><keyword><style face="normal" font="default"> SEED</style></keyword><keyword><style face="normal" font="default"> SEEDLINGS</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SUPPRESSION</style></keyword><keyword><style face="normal" font="default"> SURFACE</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> weed control</style></keyword><keyword><style face="normal" font="default"> weed management</style></keyword><keyword><style face="normal" font="default"> weed seedlings</style></keyword><keyword><style face="normal" font="default"> WEEDS</style></keyword></keywords><dates><year Day="0" Month="0" Year="1996">1996</year></dates><abstract><style face="normal" font="default">There is a current need to develop alternative weed management techniques in response to demands for reduction in herbicide use due mainly to health and environmental concerns. Therefore, all possible nonchemical strategies for weed control should be considered, including biological control. Deleterious rhizobacteria (DRB), largely overlooked as potential biological control agents for weeds until recently, are able to colonize root surfaces of weed seedlings and suppress plant growth, Limited field studies indicate that DRB suppressed weed growth, and reduced weed density, biomass, and seed production. In this manner, crops out-compete the suppressed weeds for growth requirements, eliminating the necessity for eradication of weeds in the crop. Establishment of DRB as a viable biological control strategy initially will require integration with other weed control approaches including other biocontrol agents, agrichemicals, and cultural and residue management practices. To achieve success, more in-depth research is needed on ecology of bacteria-plant relationships, mechanisms of action (including characterization of phytotoxins), inocula formulations, and methods to enhance crop competition</style></abstract><notes><style face="normal" font="default">JArticleJUL-SEPDiscipline: AGRONOMY; PLANT Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1996VB91300025</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0109-kremer.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>125</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lerch,R.N.</style></author><author><style face="normal" font="default"> Donald,W.W.</style></author><author><style face="normal" font="default"> Li,Y.X.</style></author><author><style face="normal" font="default"> Alberts,E.E.</style></author></authors></contributors><titles><title><style face="normal" font="default">Hydroxylated atrazine degradation products in a small Missouri stream</style></title><secondary-title><style face="normal" font="default">Abstracts of Papers of the American Chemical Society</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Abstracts of Papers of the American Chemical Society</style></full-title></periodical><pages end="ENVR" start="60">60-ENVR</pages><volume><style face="normal" font="default">209</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">atrazine</style></keyword><keyword><style face="normal" font="default"> atrazine degradation products</style></keyword><keyword><style face="normal" font="default"> degradation</style></keyword><keyword><style face="normal" font="default"> DEGRADATION PRODUCTS</style></keyword><keyword><style face="normal" font="default"> DEGRADATION-PRODUCTS</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword></keywords><dates><year Day="0" Month="0" Year="1996">1996</year></dates><notes><style face="normal" font="default">JMeeting AbstractAPR 2Part 1Discipline: CHEMISTRY, MULTIDIDiscipline: IPLINARY</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1995QP23202006</url><url ppv-ref="no">ISI:A1996BF94W00019</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0125-lerch.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>98</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Souissi,T.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> White,J.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Interaction of rhizobacteria with leafy spurge (Euphorbia esula L) callus tissue cells</style></title><secondary-title><style face="normal" font="default">Plant Cell Tissue and Organ Culture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Plant Cell Tissue and Organ Culture</style></full-title></periodical><pages end="287" start="279">279-287</pages><volume><style face="normal" font="default">47</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">ANTENNARIA-MICROPHYLLA</style></keyword><keyword><style face="normal" font="default"> BACTERIA</style></keyword><keyword><style face="normal" font="default"> BIOCONTROL AGENTS</style></keyword><keyword><style face="normal" font="default"> biological control</style></keyword><keyword><style face="normal" font="default"> CULTURES</style></keyword><keyword><style face="normal" font="default"> degradation</style></keyword><keyword><style face="normal" font="default"> electron microscopy</style></keyword><keyword><style face="normal" font="default"> Euphorbia esula</style></keyword><keyword><style face="normal" font="default"> leafy spurge</style></keyword><keyword><style face="normal" font="default"> MODE</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> PLANTS</style></keyword><keyword><style face="normal" font="default"> RHIZOBACTERIA</style></keyword><keyword><style face="normal" font="default"> SURFACE</style></keyword><keyword><style face="normal" font="default"> tissue culture</style></keyword><keyword><style face="normal" font="default"> TOMATO</style></keyword></keywords><dates><year Day="0" Month="0" Year="1996">1996</year></dates><abstract><style face="normal" font="default">The interaction of two rhizobacterial isolates,Pseudomonas fluorescens isolate LS102 and Flavobacterium balustinum isolate LS105, with leafy spurge cells at the cellular level was studied using scanning and electron microscopy. Leafy spurge callus tissue inoculated with either isolate showed considerable changes compared to non-inoculated tissue. The attachment of rhizobacteria to cell surfaces was associated with the elaboration of fibrillar material which may anchor bacteria to surfaces and contribute to mediation of the phytotoxic effect caused by rhizobacteria. At the ultracellular level, inoculated callus tissue showed numerous cell alterations including vesiculation and convolution of the plasmalemma, cell wall degradation and disorganization of the cytoplasm, similar to those detected in the whole plant. It is concluded that callus tissue may provide an excellent working model to investigate the mode and/or mechanism of action of potential biocontrol agents on their host plants</style></abstract><notes><style face="normal" font="default">JArticleDiscipline: BIOTECHNOLOGY &amp; APPLIED MICROBIOLOGY; PLANT Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1996XB53500011</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0098-kremer.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>107</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Sudduth,K.A.</style></author><author><style face="normal" font="default"> Hummel,J.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Geographic operating range evaluation of a NIR soil sensor</style></title><secondary-title><style face="normal" font="default">Transactions of the Asae</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the Asae</style></full-title></periodical><pages end="1604" start="1599">1599-1604</pages><volume><style face="normal" font="default">39</style></volume><number><style face="normal" font="default">5</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">accuracy</style></keyword><keyword><style face="normal" font="default"> agricultural engineering</style></keyword><keyword><style face="normal" font="default"> area</style></keyword><keyword><style face="normal" font="default"> calibration</style></keyword><keyword><style face="normal" font="default"> CAPACITY</style></keyword><keyword><style face="normal" font="default"> carbon</style></keyword><keyword><style face="normal" font="default"> cation exchange capacity</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> evaluation</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> Illinois</style></keyword><keyword><style face="normal" font="default"> Indiana</style></keyword><keyword><style face="normal" font="default"> instrumentation</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> MOISTURE</style></keyword><keyword><style face="normal" font="default"> near infrared</style></keyword><keyword><style face="normal" font="default"> near-infrared</style></keyword><keyword><style face="normal" font="default"> organic matter</style></keyword><keyword><style face="normal" font="default"> ORGANIC-CARBON</style></keyword><keyword><style face="normal" font="default"> ORGANIC-MATTER CONTENT</style></keyword><keyword><style face="normal" font="default"> precision agriculture</style></keyword><keyword><style face="normal" font="default"> prediction</style></keyword><keyword><style face="normal" font="default"> reflectance</style></keyword><keyword><style face="normal" font="default"> SAMPLES</style></keyword><keyword><style face="normal" font="default"> sensor</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil moisture</style></keyword><keyword><style face="normal" font="default"> soil organic carbon</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> SPECTROPHOTOMETER</style></keyword><keyword><style face="normal" font="default"> spectrophotometry</style></keyword><keyword><style face="normal" font="default"> STATES</style></keyword></keywords><dates><year Day="0" Month="0" Year="1996">1996</year></dates><abstract><style face="normal" font="default">A previously developed prototype soil sensor which used near infrared (NIR) reflectance techniques was tested in the laboratory. The test set of soils included 30 Illinois soils and another 33 soils collected from across the continental U.S., all prepared at soil moisture tensions ranging from 1.5 MPa (wilting point) to 0.033 MPa (field capacity). As the geographic range represented by the included samples was increased, the predictions of organic carbon, cation exchange capacity and soil moisture became less accurate. Calibrations obtained with soils from several states of the lower Corn Belt (Illinois, Missouri, Indiana, and Ohio) were only slightly less predictive of soil organic carbon than calibrations developed for the Illinois soils alone. Extension of the geographic range westward or northward from this area reduced the organic carbon prediction accuracy to an unacceptable level</style></abstract><notes><style face="normal" font="default">JArticleSEP-OCTDiscipline: AGRICULTURAL ENGINEERING</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1996VQ59100002</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0107-sudduth.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>380</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Alberts,E.E.</style></author><author><style face="normal" font="default"> Wendt,R.C.</style></author><author><style face="normal" font="default"> Burwell,R.E.</style></author></authors></contributors><titles><title><style face="normal" font="default">Corn and soybean cropping effects on soil losses and </style><style face="italic" font="default">C </style><style face="normal" font="default">factors</style></title><secondary-title><style face="normal" font="default">Soil Science Society of America Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil Science Society of America Journal</style></full-title></periodical><pages end="728" start="721">721-728</pages><volume><style face="normal" font="default">49</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">corn</style></keyword><keyword><style face="normal" font="default"> soybean</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SOIL LOSS</style></keyword><keyword><style face="normal" font="default"> losses</style></keyword></keywords><dates><year Day="0" Month="0" Year="1995">1995</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0380-alberts.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>122</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Benhammouda,M.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Minor,H.C.</style></author></authors></contributors><titles><title><style face="normal" font="default">Phytotoxicity of Extracts from Sorghum Plant-Components on Wheat Seedlings</style></title><secondary-title><style face="normal" font="default">Crop Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Crop Science</style></full-title></periodical><pages end="1656" start="1652">1652-1656</pages><volume><style face="normal" font="default">35</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">ALLELOPATHY</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> EXTRACTS</style></keyword><keyword><style face="normal" font="default"> GERMINATION</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> LEAF</style></keyword><keyword><style face="normal" font="default"> leaves</style></keyword><keyword><style face="normal" font="default"> PHYTOTOXICITY</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> RESIDUE</style></keyword><keyword><style face="normal" font="default"> RESIDUES</style></keyword><keyword><style face="normal" font="default"> roots</style></keyword><keyword><style face="normal" font="default"> SEED</style></keyword><keyword><style face="normal" font="default"> SEEDLINGS</style></keyword><keyword><style face="normal" font="default"> SEEDS</style></keyword><keyword><style face="normal" font="default"> species</style></keyword><keyword><style face="normal" font="default"> stems</style></keyword><keyword><style face="normal" font="default"> STRAW</style></keyword><keyword><style face="normal" font="default"> Triticum aestivum</style></keyword><keyword><style face="normal" font="default"> Triticum aestivum L</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> WEEDS</style></keyword><keyword><style face="normal" font="default"> WHEAT</style></keyword><keyword><style face="normal" font="default"> WHEAT YIELD</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> yields</style></keyword></keywords><dates><year Day="0" Month="0" Year="1995">1995</year></dates><abstract><style face="normal" font="default">Wheat (Triticum aestivum L.) yield Is depressed when the crop is grown after gain sorghum [Sorghum bicolor (L.) Moench], a known allelopathic species. Since little is known about the variability of allelopathic potential among sorghum hybrids on wheat, six sorghum hybrids were selected from a 1989-1990 sorghum-wheat sequence for further study. The range in yield depression observed was 16%. The sis hybrids were grown in 1991 and separated into plant parts at maturity. A bioassay using wheat seedlings to detect allelopathic potential was developed. Bioassays of water extracts From mature seeds, glumes, leaves, sterns, and roots of sorghum were conducted to (i) quantify the allelopathic potential of sorghum on wheat; (ii) compare allelopathic potential of individual sorghum hybrids; and (iii) identify the plant parts that are the most important sources of allelopathic substances. Wheat radicle growth response to water extracts revealed a highly allelopathic hybrid and two hybrids with low allelopathic potential, These were retained for study in 1992. All plant parts, regardless of hybrid, contained water-soluble materials inhibitory to wheat seedling growth. Stems, iea fes, and toots were the most inhibitory components of a sorghum plant, reducing wheat radicle elongation by 74.7, 68.5, 64.0%, respectively, Within a sorghum hybrid, an individual giant part was not consistently allelopathic at the same level across years, Bioassays can rapidly detect the differences In allelopathic potential that may occur within and among hybrids. These results have implications for using sorghum-wheat rotations where residues of certain sorghum hybrids might negatively influence growth and development of wheat, possibly resulting in decreased wheat yields</style></abstract><notes><style face="normal" font="default">JArticleNOV-DECDiscipline: AGRONOMY</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1995TD27900023</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0122-kremer.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>128</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Benhammouda,M.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Minor,H.C.</style></author><author><style face="normal" font="default"> Sarwar,M.</style></author></authors></contributors><titles><title><style face="normal" font="default">A Chemical Basis for Differential Allelopathic Potential of Sorghum Hybrids on Wheat</style></title><secondary-title><style face="normal" font="default">Journal of Chemical Ecology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Chemical Ecology</style></full-title></periodical><pages end="786" start="775">775-786</pages><volume><style face="normal" font="default">21</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">ACIDS</style></keyword><keyword><style face="normal" font="default"> ALFALFA</style></keyword><keyword><style face="normal" font="default"> BICOLOR</style></keyword><keyword><style face="normal" font="default"> BIOASSAYS</style></keyword><keyword><style face="normal" font="default"> BIOLOGY</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword><keyword><style face="normal" font="default"> cultivars</style></keyword><keyword><style face="normal" font="default"> ECOLOGY</style></keyword><keyword><style face="normal" font="default"> EXTRACTS</style></keyword><keyword><style face="normal" font="default"> FIBER</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> PHENOLIC ACIDS</style></keyword><keyword><style face="normal" font="default"> PHYTOTOXICITY</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> planting</style></keyword><keyword><style face="normal" font="default"> PLANTS</style></keyword><keyword><style face="normal" font="default"> RESIDUE</style></keyword><keyword><style face="normal" font="default"> RESIDUES</style></keyword><keyword><style face="normal" font="default"> roots</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> Sorghum bicolor</style></keyword><keyword><style face="normal" font="default"> SORGHUM-BICOLOR</style></keyword><keyword><style face="normal" font="default"> SORGHUM-BICOLOR L MOENCH</style></keyword><keyword><style face="normal" font="default"> SURFACE</style></keyword><keyword><style face="normal" font="default"> Triticum aestivum</style></keyword><keyword><style face="normal" font="default"> Triticum aestivum L</style></keyword><keyword><style face="normal" font="default"> WHEAT</style></keyword></keywords><dates><year Day="0" Month="0" Year="1995">1995</year></dates><abstract><style face="normal" font="default">The basis for differential allelopathic potentials among sorghum (Sorghum bicolor L. Moench) hybrids was investigated by conducting quantitative and qualitative studies of their phenolic contents. Total phenolic content in sorghum plant parts varied within hybrids, among hybrids, and between growing seasons. Inhibition of wheat (Triticum aestivum L.) radicle growth was positively associated (r = 0.66) with concentrations of total phenolics contained in plant parts. Extracts from culms contributed the highest proportion of toxicity from sorghum plants, inhibiting radicle growth up to 74.7$%. Concentrations of five phenolic acids, p-hydroxybenzoic (POH), vanillic (VAN), syringic (SYR), p-coumaric (PCO), and ferulic (FER), differed in all plant parts of the three sorghum hybrids. Concentrations of POH, VAN, and SYR were consistently higher than PCO and FER. PCO and FER were absent from some plant parts, with FER being the most frequently missing. Inhibition of wheat radicle growth was found to be positively associated with the concentration of each phenolic acid. Vanillic acid was most highly associated (r = 0.44) with inhibition. Thus, above-ground sorghum tissues contained phenolic acids that contributed to allelopatic potential. Additionally, sorghum roots exuded POH, VAN, and SYR that may enhance the overall allelopathic potential of sorghum during growth and after harvest when residues remain on the soil surface or are incorporated prior to planting a subsequent crop</style></abstract><notes><style face="normal" font="default">JArticleJUNDiscipline: BIOCHEMISTRY &amp; MOLECULAR BIOLOGY; ECOLOGY</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1995RE39900007</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0128-benhammouda.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>124</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Buyanovsky,G.A.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Gajda,A.M.</style></author><author><style face="normal" font="default"> Kazemi,H.V.</style></author></authors></contributors><titles><title><style face="normal" font="default">Effect of Corn Plants and Rhizosphere Populations on Pesticide Degradation</style></title><secondary-title><style face="normal" font="default">Bulletin of Environmental Contamination and Toxicology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Bulletin of Environmental Contamination and Toxicology</style></full-title></periodical><pages end="696" start="689">689-696</pages><volume><style face="normal" font="default">55</style></volume><number><style face="normal" font="default">5</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">corn</style></keyword><keyword><style face="normal" font="default"> degradation</style></keyword><keyword><style face="normal" font="default"> maize</style></keyword><keyword><style face="normal" font="default"> MICROORGANISMS</style></keyword><keyword><style face="normal" font="default"> pesticide</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> PLANTS</style></keyword><keyword><style face="normal" font="default"> POPULATIONS</style></keyword><keyword><style face="normal" font="default"> rhizosphere</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> TURNOVER</style></keyword></keywords><dates><year Day="0" Month="0" Year="1995">1995</year></dates><notes><style face="normal" font="default">JArticleNOVDiscipline: ENVIRONMENTAL Discipline: IENCES; TOXICOLOGY</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1995RU62900008</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0124-kremer.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>126</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author><author><style face="normal" font="default"> Schwartz,P.H.</style></author></authors></contributors><titles><title><style face="normal" font="default">Standard operating procedures (SOPs) for research in weed science</style></title><secondary-title><style face="normal" font="default">Weed Technology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Technology</style></full-title></periodical><pages end="401" start="397">397-401</pages><volume><style face="normal" font="default">9</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">accuracy</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> METHODS</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> QUALITY</style></keyword><keyword><style face="normal" font="default"> QUALITY CONTROL</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> TIME</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword></keywords><dates><year Day="0" Month="0" Year="1995">1995</year></dates><abstract><style face="normal" font="default">Standard operating procedures (SOPs) were developed for repetitive field research tasks to help ensure that instructions were complete and to provide consistency and continuity in the senior author's field research program. SOPs are explicit step-by-step instructions for carrying out experimental tasks that are components of experimental plans. SOPs are not the same as protocols for unique, new experimental plans. However, protocols may incorporate sequences of SOPs, if desired. SOPs are most useful for new workers and when research tasks need to be repeated infrequently in time (e.g., once every 6 mo or less per year). SOPs may help researchers enhance data accuracy, precision, and reproducibility as part of their own statistical quality control procedures. The authors' field-tested SOPs are available on diskette(3) for critical review, modification, and use by interested weed scientists</style></abstract><notes><style face="normal" font="default">JNoteAPR-JUNDiscipline: AGRONOMY; PLANT Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1995RJ47300031</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0126-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>298</rec-number><ref-type name="Book Chapter">3</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author><author><style face="normal" font="default"> Eastin,E.F.</style></author></authors><secondary-authors><author><style face="normal" font="default">Smith,A.L.</style></author></secondary-authors></contributors><titles><title><style face="normal" font="default">Weed management systems for grain crops</style></title><alt-title><style face="normal" font="default">Handbook of Weed Management Systems</style></alt-title></titles><periodical/><pages end="476" start="401">401-476</pages><number><style face="normal" font="default">11</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">weed</style></keyword><keyword><style face="normal" font="default"> weed management</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> management systems</style></keyword><keyword><style face="normal" font="default"> SYSTEMS</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> GRAIN</style></keyword><keyword><style face="normal" font="default"> crops</style></keyword><keyword><style face="normal" font="default"> CROP</style></keyword></keywords><dates><year Day="0" Month="0" Year="1995">1995</year></dates><pub-location><style face="normal" font="default">New York</style></pub-location><publisher><style face="normal" font="default">Marcel Dekker</style></publisher><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0298-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>131</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Jordan,D.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author><author><style face="normal" font="default"> Bergfield,W.A.</style></author><author><style face="normal" font="default"> Kim,K.Y.</style></author><author><style face="normal" font="default"> Cacnio,V.N.</style></author></authors></contributors><titles><title><style face="normal" font="default">Evaluation of Microbial Methods As Potential Indicators of Soil Quality in Historical Agricultural Fields</style></title><secondary-title><style face="normal" font="default">Biology and Fertility of Soils</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Biology and Fertility of Soils</style></full-title></periodical><pages end="302" start="297">297-302</pages><volume><style face="normal" font="default">19</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">area</style></keyword><keyword><style face="normal" font="default"> biomass</style></keyword><keyword><style face="normal" font="default"> carbon</style></keyword><keyword><style face="normal" font="default"> cropping systems</style></keyword><keyword><style face="normal" font="default"> ENZYME-ACTIVITIES</style></keyword><keyword><style face="normal" font="default"> evaluation</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> fields</style></keyword><keyword><style face="normal" font="default"> LONG-TERM EXPERIMENTS PRAIRIE</style></keyword><keyword><style face="normal" font="default"> management</style></keyword><keyword><style face="normal" font="default"> MANAGEMENT-PRACTICES</style></keyword><keyword><style face="normal" font="default"> METHODS</style></keyword><keyword><style face="normal" font="default"> MICROBIAL BIOMASS</style></keyword><keyword><style face="normal" font="default"> organic matter</style></keyword><keyword><style face="normal" font="default"> ORGANIC-MATTER</style></keyword><keyword><style face="normal" font="default"> PHOSPHATASE</style></keyword><keyword><style face="normal" font="default"> PHOSPHOLIPIDS</style></keyword><keyword><style face="normal" font="default"> PLOTS</style></keyword><keyword><style face="normal" font="default"> POPULATIONS</style></keyword><keyword><style face="normal" font="default"> QUALITY</style></keyword><keyword><style face="normal" font="default"> ROTATION</style></keyword><keyword><style face="normal" font="default"> SAMPLES</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil organic matter</style></keyword><keyword><style face="normal" font="default"> soil pH</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> tillage</style></keyword></keywords><dates><year Day="0" Month="0" Year="1995">1995</year></dates><abstract><style face="normal" font="default">In agricultural ecosystems that have had consistent cropping histories, standard microbial methods may be used to evaluate past and present practices. Our objective was to evaluate several microbial methods that best indicate cropping histories and soil quality on long-term plots. We selected soil microbial carbon (C), phospholipid analyses, direct counts of total fungal and bacterial biomass, and soil enzymes (phosphatases) to measure direct and indirect microbial activity on the Sanborn Field and Tucker Prairie. The Sanborn Field has been under various cropping and management practices since 1888 and the Tucker Prairie is an uncultivated site. Seven different plots were chosen on the Sanborn Field and random samples were taken in the summit area on the Tucker Prairie, which represented a reference site. Soil microbial biomass C, phospholipids, and enzyme activity were reflective of the cropping and management histories observed on the Sanborn Field. Enzymatic activity was highly correlated to soil organic matter. The direct counts of fungal and bacterial biomass showed that fungal populations dominated these soils, which may be attributed to soil pH. Soil microbial biomass C and enzyme assays seemed to be better potential indicators of cropping histories than the other methods tested in the long-term plots</style></abstract><notes><style face="normal" font="default">JArticleMARDiscipline: AGRICULTURE, SOIL Discipline: IENCE</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1995QM33500005</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0131-jordan.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>130</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Sarwar,M.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Determination of Bacterially Derived Auxins Using A Microplate Method</style></title><secondary-title><style face="normal" font="default">Letters in Applied Microbiology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Letters in Applied Microbiology</style></full-title></periodical><pages end="285" start="282">282-285</pages><volume><style face="normal" font="default">20</style></volume><number><style face="normal" font="default">5</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">accuracy</style></keyword><keyword><style face="normal" font="default"> AUXINS</style></keyword><keyword><style face="normal" font="default"> BACTERIA</style></keyword><keyword><style face="normal" font="default"> determination</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> metabolites</style></keyword><keyword><style face="normal" font="default"> METHODS</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> PLANT-GROWTH</style></keyword><keyword><style face="normal" font="default"> REAGENTS</style></keyword><keyword><style face="normal" font="default"> rhizosphere</style></keyword><keyword><style face="normal" font="default"> rhizosphere bacteria</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SUPPRESSION</style></keyword><keyword><style face="normal" font="default"> TIME</style></keyword></keywords><dates><year Day="0" Month="0" Year="1995">1995</year></dates><abstract><style face="normal" font="default">Rapid and efficient methods for determining the ability of soil and rhizosphere bacteria to produce key metabolites which are useful in growth promotion or suppression of plant growth are needed. A microplate method was developed and compared to a standard method for assays of auxin compounds produced by bacteria. The microplate method was similar to the standard method in accuracy of determination, required less chemical reagents, and considerably reduced the time required for analyses</style></abstract><notes><style face="normal" font="default">JArticleMAYDiscipline: BIOTECHNOLOGY &amp; APPLIED MICROBIOLOGY; MICROBIOLOGY</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1995QX12700005</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0130-kremer.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>127</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Sarwar,M.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Enhanced Suppression of Plant-Growth Through Production of L-Tryptophan-Derived Compounds by Deleterious Rhizobacteria</style></title><secondary-title><style face="normal" font="default">Plant and Soil</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Plant and Soil</style></full-title></periodical><pages end="269" start="261">261-269</pages><volume><style face="normal" font="default">172</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">AUXINS</style></keyword><keyword><style face="normal" font="default"> BACTERIA</style></keyword><keyword><style face="normal" font="default"> biological control</style></keyword><keyword><style face="normal" font="default"> biological weed control</style></keyword><keyword><style face="normal" font="default"> BIOLOGICAL-CONTROL</style></keyword><keyword><style face="normal" font="default"> chromatography</style></keyword><keyword><style face="normal" font="default"> CULTURE</style></keyword><keyword><style face="normal" font="default"> CYANIDE PRODUCTION</style></keyword><keyword><style face="normal" font="default"> DELETERIOUS RHIZOBACTERIA</style></keyword><keyword><style face="normal" font="default"> derivatives</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> high performance liquid chromatography</style></keyword><keyword><style face="normal" font="default"> HORMONES</style></keyword><keyword><style face="normal" font="default"> LIQUID-CHROMATOGRAPHY</style></keyword><keyword><style face="normal" font="default"> metabolites</style></keyword><keyword><style face="normal" font="default"> PATHOGENS</style></keyword><keyword><style face="normal" font="default"> performance</style></keyword><keyword><style face="normal" font="default"> PHYTOTOXICITY</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> PLANT-GROWTH</style></keyword><keyword><style face="normal" font="default"> RHIZOBACTERIA</style></keyword><keyword><style face="normal" font="default"> rhizosphere</style></keyword><keyword><style face="normal" font="default"> roots</style></keyword><keyword><style face="normal" font="default"> SEEDLINGS</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SUPPRESSION</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> weed seedlings</style></keyword><keyword><style face="normal" font="default"> WEEDS</style></keyword></keywords><dates><year Day="0" Month="0" Year="1995">1995</year></dates><abstract><style face="normal" font="default">Plant-growth-suppressive activity of deleterious rhizobacteria (DRB) may be due to production of metabolites absorbed through roots. Auxins produced in high concentrations in the rhizosphere by DRB contribute to reduced root growth. Selected DRB able to produce excessive amounts of auxin compounds for suppression of weed seedling growth may be effective for biological control of weeds. The objectives to this study were to assess the ability of DRB originating from weed seedlings to synthesize auxins from L-tryptophan (L-TRP), determine effects of DRB with or without L-TRP on seedling root growth, and characterize auxins produced from L-TRP using high performance liquid chromatography (HPLC). Auxins expressed as indole-3-acetic acid (IAA)-equivalents were produced by 22.8% of the DRB tested based on a colorimetric method. Under laboratory conditions, a DRB isolate classified as Enterobacter taylorae with high auxin-producing potential (72 mg L(-1) IAA-equivalents) inhibited root growth of field bindweed (Convolvulus arvensis L.) by 90.5% when combined with 10(-5) M L-TRP compared with non-treated control. Auxin derivatives produced by E. taylorae from L-TRP in broth culture after 24 h incubation identified by HPLC included IAA (102 mu g L(-1)), indole-3-aldehyde (IALD; 0.4 mu g L(-1)), and indole-3-lactic acid (ILA; 7.6 mu g L(-1)). Results suggest that providing L-TRP with selected auxin-producing DRB to increase phytotoxic activity against emerging weed seedlings may be a practical biological control strategy</style></abstract><notes><style face="normal" font="default">JArticleMAYDiscipline: AGRICULTURE, SOIL Discipline: IENCE; AGRONOMY; PLANT Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1995RJ24400011</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0127-kremer.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>272</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Sudduth,K.A.</style></author><author><style face="normal" font="default"> Borgelt,S.C.</style></author><author><style face="normal" font="default"> Hou,J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Performance of a chemical injection sprayer system</style></title><secondary-title><style face="normal" font="default">Applied Engineering in Agriculture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Applied Engineering in Agriculture</style></full-title></periodical><pages end="348" start="345">345-348</pages><volume><style face="normal" font="default">11</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">performance</style></keyword><keyword><style face="normal" font="default"> injection</style></keyword><keyword><style face="normal" font="default"> sprayer</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword></keywords><dates><year Day="0" Month="0" Year="1995">1995</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0272-sudduth.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>134</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Zhu,J.C.</style></author><author><style face="normal" font="default"> Gantzer,C.J.</style></author><author><style face="normal" font="default"> Peyton,R.L.</style></author><author><style face="normal" font="default"> Alberts,E.E.</style></author><author><style face="normal" font="default"> Anderson,S.H.</style></author></authors></contributors><titles><title><style face="normal" font="default">Simulated Small-Channel Bed Scour and Head Cut Erosion Rates Compared</style></title><secondary-title><style face="normal" font="default">Soil Science Society of America Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil Science Society of America Journal</style></full-title></periodical><pages end="218" start="211">211-218</pages><volume><style face="normal" font="default">59</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">characterization</style></keyword><keyword><style face="normal" font="default"> CONCENTRATED FLOW</style></keyword><keyword><style face="normal" font="default"> cutting</style></keyword><keyword><style face="normal" font="default"> EROSION</style></keyword><keyword><style face="normal" font="default"> FLOW</style></keyword><keyword><style face="normal" font="default"> HYDRAULIC FLUME</style></keyword><keyword><style face="normal" font="default"> losses</style></keyword><keyword><style face="normal" font="default"> PREDICTION TECHNOLOGY</style></keyword><keyword><style face="normal" font="default"> RATES</style></keyword><keyword><style face="normal" font="default"> RILL EROSION</style></keyword><keyword><style face="normal" font="default"> SHEAR STRESS</style></keyword><keyword><style face="normal" font="default"> slope</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SOIL LOSS</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> STRESS</style></keyword><keyword><style face="normal" font="default"> TIME</style></keyword><keyword><style face="normal" font="default"> WEPP</style></keyword></keywords><dates><year Day="0" Month="0" Year="1995">1995</year></dates><abstract><style face="normal" font="default">Concentrated-flow erosion is often a major part of cropland erosion. The concentrated-Bow processes of bed scour and head cut need improved characterization to better predict and prevent erosion. This study was conducted to compare the erosion rates due to simulated small-scale bed-scour (Db) and head-cut (Db) processes. A 6.4-m-long by 0.15-m-wide hydraulic flume was used to simulate concentrated-flaw erosion on five Midwestern soils: Barnes (fine-Loamy, mixed Udic Haploboroll), Forman (fine-loamy, mixed Udic Argiboroll), Mexico (fine, montmorillonitic, mesic Udollic Ochraqualf), Sharpsburg (fine, montmorillonitic, mesic Typic Argiudoll), and Sverdrup (sandy, mixed Udic Haploboroll). For slopes of 1.5, 3.5, and 5.0%, Bow rates of 3.78, 5.67, 7.65, 11.34, and 15.12 L min(-1) were used to provide a range from low (0.5 Pa) to moderate (2.5 Pa) shear stresses (tau). Soil detachment rates are functions of slope, flow rate, and shear stress. Slope, how, their squares, and the slope X flow interaction were highly significant predictors of Db. Only flow, its square, and its interaction with slope were significant predictors of Dh. Nonlinear power regressions using tau as an independent variable were better predictors of detachment than simple linear regressions. Erodibility for the soils from this study does not relate well with soil erodibility calculated using the Universal Soil Loss Equation. Differences in the slope and intercept of detachment vs. tau exist among soils. The value of D-h was at least four times greater than D-b for all soils at equal slope and flow rate, indicating that head cutting is the main process of detachment for the conditions tested</style></abstract><notes><style face="normal" font="default">JArticleJAN-FEBDiscipline: AGRICULTURE, SOIL Discipline: IENCE</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1995QD33600032</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0134-zhu.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>135</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Begonia,M.F.T.</style></author><author><style face="normal" font="default"> Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Chemotaxis of Deleterious Rhizobacteria to Velvetleaf (Abutilon-Theophrasti Medik) Seeds and Seedlings</style></title><secondary-title><style face="normal" font="default">Fems Microbiology Ecology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Fems Microbiology Ecology</style></full-title></periodical><pages end="235" start="227">227-235</pages><volume><style face="normal" font="default">15</style></volume><number><style face="normal" font="default">3-4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">ABUTILON THEOPHRASTI MEDIK</style></keyword><keyword><style face="normal" font="default"> ACIDS</style></keyword><keyword><style face="normal" font="default"> BACTERIA</style></keyword><keyword><style face="normal" font="default"> biological control</style></keyword><keyword><style face="normal" font="default"> BIOLOGICAL-CONTROL</style></keyword><keyword><style face="normal" font="default"> chemotaxis</style></keyword><keyword><style face="normal" font="default"> colonization</style></keyword><keyword><style face="normal" font="default"> DELETERIOUS RHIZOBACTERIA</style></keyword><keyword><style face="normal" font="default"> DOWNY BROME</style></keyword><keyword><style face="normal" font="default"> FLUORESCENT PSEUDOMONADS</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> RHIZOBACTERIA</style></keyword><keyword><style face="normal" font="default"> rhizosphere</style></keyword><keyword><style face="normal" font="default"> roots</style></keyword><keyword><style face="normal" font="default"> SEED</style></keyword><keyword><style face="normal" font="default"> SEEDLINGS</style></keyword><keyword><style face="normal" font="default"> SEEDS</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> spermosphere</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> weed seeds</style></keyword><keyword><style face="normal" font="default"> WEED SEEDS AND SEEDLINGS</style></keyword></keywords><dates><year Day="0" Month="0" Year="1994">1994</year></dates><abstract><style face="normal" font="default">Intact seeds and seed and seedling root exudates of velvetleaf (Abutilon theophrasti Medik.) were used as chemoattractants in experiments to determine the relative importance of chemotaxis in spermosphere and rhizosphere colonization by selected rhizobacteria. Results for soft-agar, capillary tube and soil chemotaxis assays indicated that selected deleterious rhizobacteria were specifically attracted to seed and seedling root exudates. Several amino acids and sugars detected in exudates were chemoattractants for these rhizobacteria. Using soil-chemotaxis assemblies, migration of rhizobacterial isolates through 2-cm distances of soil toward velvetleaf seeds or exudates was detected within 24 h. Isolates were not detected at the same site in soils without seeds or exudates until 72 h after inoculation. These results suggest that attraction of deleterious rhizobacteria toward seeds and seedling roots mediated by exudates (chemotaxis) might be the first step in establishment and subsequent colonization of biological control bacteria on weed seeds and seedling roots in soil</style></abstract><notes><style face="normal" font="default">JArticleDECDiscipline: MICROBIOLOGY</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1994QA11600001</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0131-kremer.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>255</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">A method of validating the tetrazolium assay for testing viability of dormant jointed goatgrass (aegilops cylindrica) seed</style></title><secondary-title><style face="normal" font="default">Weed Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Science</style></full-title></periodical><pages end="508" start="502">502-508</pages><volume><style face="normal" font="default">42</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">SEED</style></keyword></keywords><dates><year Day="0" Month="0" Year="1994">1994</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0255-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>193</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">The biology of Canada thistle (Cirsium arvense L.)</style></title><secondary-title><style face="normal" font="default">Reviews of Weed Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Reviews of Weed Science</style></full-title></periodical><pages end="101" start="77">77-101</pages><volume><style face="normal" font="default">6</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">BIOLOGY</style></keyword><keyword><style face="normal" font="default"> CANADA</style></keyword><keyword><style face="normal" font="default"> Canada thistle</style></keyword></keywords><dates><year Day="0" Month="0" Year="1994">1994</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0193-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>136</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Geostatistics for Mapping Weeds, with A Canada Thistle (Cirsium arvense) Patch As A Case-Study</style></title><secondary-title><style face="normal" font="default">Weed Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Science</style></full-title></periodical><pages end="657" start="648">648-657</pages><volume><style face="normal" font="default">42</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">ADVENTITIOUS ROOT BUDS</style></keyword><keyword><style face="normal" font="default"> biomass</style></keyword><keyword><style face="normal" font="default"> CANADA</style></keyword><keyword><style face="normal" font="default"> Canada thistle</style></keyword><keyword><style face="normal" font="default"> case studies</style></keyword><keyword><style face="normal" font="default"> DENSITY</style></keyword><keyword><style face="normal" font="default"> distribution</style></keyword><keyword><style face="normal" font="default"> economics</style></keyword><keyword><style face="normal" font="default"> estimation</style></keyword><keyword><style face="normal" font="default"> geostatistics</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> kriging</style></keyword><keyword><style face="normal" font="default"> L SCOP</style></keyword><keyword><style face="normal" font="default"> mapping</style></keyword><keyword><style face="normal" font="default"> maps</style></keyword><keyword><style face="normal" font="default"> METHODS</style></keyword><keyword><style face="normal" font="default"> PATCH</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> ROOT</style></keyword><keyword><style face="normal" font="default"> semivariance</style></keyword><keyword><style face="normal" font="default"> SHOOTS</style></keyword><keyword><style face="normal" font="default"> soil properties</style></keyword><keyword><style face="normal" font="default"> SPATIAL DEPENDENCE</style></keyword><keyword><style face="normal" font="default"> spatial statistics</style></keyword><keyword><style face="normal" font="default"> TILL SPRING WHEAT</style></keyword><keyword><style face="normal" font="default"> TRITICUM-AESTIVUM</style></keyword><keyword><style face="normal" font="default"> variation</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> WEED DENSITY</style></keyword><keyword><style face="normal" font="default"> WEEDS</style></keyword></keywords><dates><year Day="0" Month="0" Year="1994">1994</year></dates><abstract><style face="normal" font="default">Geostatistical methods were used to describe and map nonrandom distribution and variation (standard deviation) of shoot density and root growth across a well-established patch of Canada thistle, a perennial weed. Semivariogram functions and kriging, an interpolation method, were used to prepare isoarithmic contour maps and associated error maps. Maps consisted of interpolated contours of uniform weed density and other measured or calculated regionalized variables between measured X-Y control points, as well as maps of error (standard deviation) associated with contour estimation. Mapped regions of greatest shoot density across a patch not only had the greatest underlying root biomass and, often, greatest density of adventitious root buds, but also had more deeply growing root biomass. Nomenclature: Canada thistle, Cirsium arvense (L.) Scop. # CIRAR3</style></abstract><notes><style face="normal" font="default">JArticleOCT-DECDiscipline: AGRONOMY; PLANT Discipline: IENCES</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1994PY82000024</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0136-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>270</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Doolittle,J.A.</style></author><author><style face="normal" font="default"> Sudduth,K.A.</style></author><author><style face="normal" font="default"> Kitchen,N.R.</style></author><author><style face="normal" font="default"> Indorante,S.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Estimating depths to claypans using electromagnetic induction methods</style></title><secondary-title><style face="normal" font="default">Journal of Soil and Water Conservation</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Soil and Water Conservation</style></full-title></periodical><pages end="575" start="572">572-575</pages><volume><style face="normal" font="default">49</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">depth</style></keyword><keyword><style face="normal" font="default"> electromagnetic induction</style></keyword><keyword><style face="normal" font="default"> METHODS</style></keyword></keywords><dates><year Day="0" Month="0" Year="1994">1994</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0270-doolittle.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>140</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Duru,J.O.</style></author><author><style face="normal" font="default"> Hjelmfelt,A.T.</style></author></authors></contributors><auth-address><style face="normal" font="default">UNIV MISSOURI,USDA ARS,COLUMBIA,MO 65201FED UNIV TECHNOL OWERRI,SCH ENGN &amp; ENGN TECHNOL,OWERRI,NIGERIA</style></auth-address><titles><title><style face="normal" font="default">Investigating Prediction Capability of Hec-1 and Kineros Kinematic Wave Runoff Models</style></title><secondary-title><style face="normal" font="default">Journal of Hydrology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Hydrology</style></full-title></periodical><pages end="103" start="87">87-103</pages><volume><style face="normal" font="default">157</style></volume><number><style face="normal" font="default">1-4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">accuracy</style></keyword><keyword><style face="normal" font="default"> calibration</style></keyword><keyword><style face="normal" font="default"> infiltration</style></keyword><keyword><style face="normal" font="default"> Iowa</style></keyword><keyword><style face="normal" font="default"> models</style></keyword><keyword><style face="normal" font="default"> Netherlands</style></keyword><keyword><style face="normal" font="default"> prediction</style></keyword><keyword><style face="normal" font="default"> runoff</style></keyword><keyword><style face="normal" font="default"> TIME</style></keyword><keyword><style face="normal" font="default"> watershed</style></keyword></keywords><dates><year Day="0" Month="0" Year="1994">1994</year></dates><isbn><style face="normal" font="default">0022-1694</style></isbn><abstract><style face="normal" font="default">In this study, two distributed parameter, physically based, kinematic wave hydrologic models, HEC-1 and KINEROS, were tested on a 30.4 ha watershed located near Treynor, Iowa. The study had two objectives: (1) to determine the ability of the models to predict runoff with very limited calibration; (2) to determine how accurately the models can simulate runoff given accurate model parameters. The results show that HEC-1 can achieve good prediction of runoff with very limited calibration. It was not, however, possible to achieve the same level of prediction with the KINEROS model. Given good calibration, both models can simulate the rainfall-runoff process with great accuracy</style></abstract><notes><style face="normal" font="default">Times Cited: 5ArticleEnglishCited References Count: 25NL365ELSEVIER SCIENCE BVPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSAMSTERDAM</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1994NL36500006</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0140-duru.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>133</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Ghidey,F.</style></author><author><style face="normal" font="default"> Alberts,E.E.</style></author></authors></contributors><titles><title><style face="normal" font="default">Interrill erodibility affected by cropping systems and initial soil-water content</style></title><secondary-title><style face="normal" font="default">Transactions of the Asae</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the Asae</style></full-title></periodical><pages end="1815" start="1809">1809-1815</pages><volume><style face="normal" font="default">37</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">accuracy</style></keyword><keyword><style face="normal" font="default"> AGGREGATE STABILITY</style></keyword><keyword><style face="normal" font="default"> agricultural engineering</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> CROPLAND SOILS</style></keyword><keyword><style face="normal" font="default"> cropping system</style></keyword><keyword><style face="normal" font="default"> cropping systems</style></keyword><keyword><style face="normal" font="default"> EROSION</style></keyword><keyword><style face="normal" font="default"> INTERRILL ERODIBILITY</style></keyword><keyword><style face="normal" font="default"> interrill erosion</style></keyword><keyword><style face="normal" font="default"> LOAM</style></keyword><keyword><style face="normal" font="default"> loam soils</style></keyword><keyword><style face="normal" font="default"> losses</style></keyword><keyword><style face="normal" font="default"> prediction</style></keyword><keyword><style face="normal" font="default"> RAINFALL</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> runoff</style></keyword><keyword><style face="normal" font="default"> RUNOFF SOIL LOSS</style></keyword><keyword><style face="normal" font="default"> SAMPLES</style></keyword><keyword><style face="normal" font="default"> silt loam soils</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SOIL LOSS</style></keyword><keyword><style face="normal" font="default"> soil water</style></keyword><keyword><style face="normal" font="default"> soil water content</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> soybean</style></keyword><keyword><style face="normal" font="default"> STEEPNESS</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> SYSTEMS</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> WATER-CONTENT</style></keyword></keywords><dates><year Day="0" Month="0" Year="1994">1994</year></dates><abstract><style face="normal" font="default">The effects of continuous soybean and continuous corn cropping systems and initial water content (IWC) of the soil on runoff, soil loss, and interrill erodibility were studied in the laboratory. Samples of a Mexico silt loam (Udollic Ochraqualf) were packed in 0.3-m-wide x 1.0-m-long soil beds and subjected to a series of simulated rainfall events. Differences in measured runoff and soil loss between the cropping systems were less than 1.0%. The IWC did not affect soil loss during the initial event, but it had a significant effect (p &lt; 0.05) during the following event where an increase in mean IWC from 4 to 15% decreased mean soil loss from 12.9 to 10.7 g min(-1) m(-2). Cropping did not influence interrill erodibility (K-i) calculated from a power relationship with rainfall intensity. There wars a negative linear relationship between K-i and IWC. Calculating K-i from rainfall intensity and runoff rate improved the relationship between K-i and IWC. Our results indicate that interrill soil losses and erodibility are sensitive to IWC and need to be considered in interrill erosion research and modeling, particularly for silt loam soils. Our results also indicate that including a runoff rate term in the equation used to predict interrill erosion will improve its prediction accuracy</style></abstract><notes><style face="normal" font="default">JArticleNOV-DECDiscipline: AGRICULTURAL ENGINEERING</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1994QF37000012</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0133-ghidey.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>336</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Hjelmfelt,A.T.</style></author><author><style face="normal" font="default"> Wang,M.</style></author></authors></contributors><titles><title><style face="normal" font="default">General stochastic unit hydrograph</style></title><secondary-title><style face="normal" font="default">Journal of Irrigation and Drainage Engineering-Asce</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Irrigation and Drainage Engineering-Asce</style></full-title></periodical><pages end="148" start="139">139-148</pages><volume><style face="normal" font="default">120</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords/><dates><year Day="0" Month="0" Year="1994">1994</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0336-hjelmfelt.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>201</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lerch,R.N.</style></author><author><style face="normal" font="default"> Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Analysis of Hydroxylated Atrazine Degradation Products in Water Using Solid-Phase Extraction and High-Performance Liquid Chromatography</style></title><secondary-title><style face="normal" font="default">Journal of Agricultural and Food Chemistry</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Agricultural and Food Chemistry</style></full-title></periodical><pages end="927" start="922">922-927</pages><volume><style face="normal" font="default">42</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">atrazine</style></keyword><keyword><style face="normal" font="default"> atrazine degradation products</style></keyword><keyword><style face="normal" font="default"> chromatography</style></keyword><keyword><style face="normal" font="default"> degradation</style></keyword><keyword><style face="normal" font="default"> DEGRADATION PRODUCTS</style></keyword><keyword><style face="normal" font="default"> DEGRADATION-PRODUCTS</style></keyword><keyword><style face="normal" font="default"> extraction</style></keyword><keyword><style face="normal" font="default"> high performance liquid chromatography</style></keyword><keyword><style face="normal" font="default"> LIQUID-CHROMATOGRAPHY</style></keyword><keyword><style face="normal" font="default"> SOLID-PHASE EXTRACTION</style></keyword><keyword><style face="normal" font="default"> water</style></keyword></keywords><dates><year Day="0" Month="0" Year="1994">1994</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0201-lerch.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>239</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Models and sampling for studying weed seed survival with wild mustard (Sinapis arvensis) as a case study</style></title><secondary-title><style face="normal" font="default">Journal of Plant Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Plant Science</style></full-title></periodical><pages end="645" start="637">637-645</pages><volume><style face="normal" font="default">73</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">case studies</style></keyword><keyword><style face="normal" font="default"> MODEL</style></keyword><keyword><style face="normal" font="default"> models</style></keyword><keyword><style face="normal" font="default"> sampling</style></keyword><keyword><style face="normal" font="default"> SEED</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword></keywords><dates><year Day="0" Month="0" Year="1993">1993</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0239-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>194</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Retreatment with fall-applied herbicides for Canada thistle (Cirsium arvense) control</style></title><secondary-title><style face="normal" font="default">Weed Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Science</style></full-title></periodical><pages end="440" start="434">434-440</pages><volume><style face="normal" font="default">41</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">CANADA</style></keyword><keyword><style face="normal" font="default"> Canada thistle</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword></keywords><dates><year Day="0" Month="0" Year="1993">1993</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0194-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>192</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Root versus shoot measurements to evaluate recovery of Canada thistle (Cirsium arvense) after several years of control treatments.</style></title><secondary-title><style face="normal" font="default">Canadian Journal of Plant Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Canadian Journal of Plant Science</style></full-title></periodical><pages end="373" start="369">369-373</pages><volume><style face="normal" font="default">73</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">CANADA</style></keyword><keyword><style face="normal" font="default"> Canada thistle</style></keyword><keyword><style face="normal" font="default"> case studies</style></keyword><keyword><style face="normal" font="default"> measurement</style></keyword><keyword><style face="normal" font="default"> PATCH</style></keyword><keyword><style face="normal" font="default"> ROOT</style></keyword></keywords><dates><year Day="0" Month="0" Year="1993">1993</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0192-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>254</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author><author><style face="normal" font="default"> Tanaka,F.S..</style></author></authors></contributors><titles><title><style face="normal" font="default">The germination stimulant AC94377 reduces seed survival of wild mustard (Sinapis arvensis)</style></title><secondary-title><style face="normal" font="default">Weed Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Science</style></full-title></periodical><pages end="193" start="185">185-193</pages><volume><style face="normal" font="default">41</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">GERMINATION</style></keyword><keyword><style face="normal" font="default"> SEED</style></keyword></keywords><dates><year Day="0" Month="0" Year="1993">1993</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0254-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>265</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Ghidey,F.</style></author><author><style face="normal" font="default"> Alberts,E.E.</style></author></authors></contributors><titles><title><style face="normal" font="default">Residue type and placement effects on decomposition: field study and model evaluation</style></title><secondary-title><style face="normal" font="default">Transactions of the ASABE</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the ASABE</style></full-title></periodical><pages end="1617" start="1611">1611-1617</pages><volume><style face="normal" font="default">36</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">evaluation</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> MODEL</style></keyword><keyword><style face="normal" font="default"> placement</style></keyword><keyword><style face="normal" font="default"> RESIDUE</style></keyword></keywords><dates><year Day="0" Month="0" Year="1993">1993</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0265-ghidey.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>142</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Hjelmfelt,A.T.</style></author><author><style face="normal" font="default"> Pi,Z.Z.</style></author></authors></contributors><auth-address><style face="normal" font="default">UNIV MISSOURI,DEPT AGR ENGN,COLUMBIA,MO 65211</style></auth-address><titles><title><style face="normal" font="default">Movement of Ground-Water in Converging Aquifer</style></title><secondary-title><style face="normal" font="default">Journal of Irrigation and Drainage Engineering-Asce</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Irrigation and Drainage Engineering-Asce</style></full-title></periodical><pages end="322" start="312">312-322</pages><volume><style face="normal" font="default">119</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">FLOW</style></keyword><keyword><style face="normal" font="default"> groundwater</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> SYSTEMS</style></keyword><keyword><style face="normal" font="default"> TIME</style></keyword><keyword><style face="normal" font="default"> water</style></keyword></keywords><dates><year Day="0" Month="0" Year="1993">1993</year></dates><isbn><style face="normal" font="default">0733-9437</style></isbn><abstract><style face="normal" font="default">An analytical solution for regional flow in a converging or wedge-shaped aquifer is given. Darcy's law and the continuity equation, expressed in cylindrical coordinates, were solved for flow in a vertical cross section of a two-dimensional aquifer. The lower horizontal boundary and the vertical boundaries at r = 0 and r = a are no-flow boundaries. The upper horizontal boundary is a prescribed head consisting of a linear increase with radius onto which is superimposed a sine wave. In plan view, the streamlines are radially convergent. The converging system shows a concentration of streamlines near the divide and a spreading of streamlines near the apex due to the prescribed potential on the upper boundary that limits the rate of water movement toward the apex. The effect of relief on local flow systems is limited, especially in the region near the valley bottom</style></abstract><notes><style face="normal" font="default">Times Cited: 0ArticleEnglishHJELMFELT, A. TUNIV MISSOURI,USDA ARS,AGR ENGN BLDG,COLUMBIA,MO 65211Cited References Count: 13KU158ASCE-AMER SOC CIVIL ENGINEERS345 E 47TH ST, NEW YORK, NY 10017-2398NEW YORK</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1993KU15800008</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0142-hjelmfelt.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>202</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Management of Weed Seed Banks with Microorganisms</style></title><secondary-title><style face="normal" font="default">Ecological Applications</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Ecological Applications</style></full-title></periodical><pages end="52" start="42">42-52</pages><volume><style face="normal" font="default">3</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">management</style></keyword><keyword><style face="normal" font="default"> MICROORGANISMS</style></keyword><keyword><style face="normal" font="default"> SEED</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword></keywords><dates><year Day="0" Month="0" Year="1993">1993</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0202-kremer.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>386</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lerch,R.N.</style></author><author><style face="normal" font="default"> Barbarick,K.A.</style></author><author><style face="normal" font="default"> Azari,P.</style></author><author><style face="normal" font="default"> Sommers,L.E.</style></author><author><style face="normal" font="default"> Westfall,D.G.</style></author></authors></contributors><titles><title><style face="normal" font="default">Sewage Sludge Proteins: I. Extraction Methodology</style></title><secondary-title><style face="normal" font="default">Journal of Environmental Quality</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Environmental Quality</style></full-title></periodical><pages end="624" start="620">620-624</pages><volume><style face="normal" font="default">22</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">sewage sludge</style></keyword><keyword><style face="normal" font="default"> proteins</style></keyword><keyword><style face="normal" font="default"> extraction</style></keyword><keyword><style face="normal" font="default"> methodology</style></keyword></keywords><dates><year Day="0" Month="0" Year="1993">1993</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0386-lerch.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>183</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Sudduth,K.A.</style></author><author><style face="normal" font="default"> Hummel,J.W.</style></author></authors></contributors><auth-address><style face="normal" font="default">USDA,CROP PROTECT RES UNIT,URBANA,IL 61801</style></auth-address><titles><title><style face="normal" font="default">Portable, Near-Infrared Spectrophotometer for Rapid Soil Analysis</style></title><secondary-title><style face="normal" font="default">Transactions of the Asae</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the Asae</style></full-title></periodical><pages end="193" start="185">185-193</pages><volume><style face="normal" font="default">36</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">estimation</style></keyword><keyword><style face="normal" font="default"> FIBER</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> near infrared</style></keyword><keyword><style face="normal" font="default"> near-infrared</style></keyword><keyword><style face="normal" font="default"> optics</style></keyword><keyword><style face="normal" font="default"> organic matter</style></keyword><keyword><style face="normal" font="default"> ORGANIC-MATTER</style></keyword><keyword><style face="normal" font="default"> ORGANIC-MATTER CONTENT</style></keyword><keyword><style face="normal" font="default"> performance</style></keyword><keyword><style face="normal" font="default"> reflectance</style></keyword><keyword><style face="normal" font="default"> SAMPLES</style></keyword><keyword><style face="normal" font="default"> sensing</style></keyword><keyword><style face="normal" font="default"> sensors</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil analysis</style></keyword><keyword><style face="normal" font="default"> soil organic matter</style></keyword><keyword><style face="normal" font="default"> SPECTROPHOTOMETER</style></keyword><keyword><style face="normal" font="default"> spectrophotometry</style></keyword><keyword><style face="normal" font="default"> TIME</style></keyword><keyword><style face="normal" font="default"> USDA</style></keyword><keyword><style face="normal" font="default"> variable rate application</style></keyword><keyword><style face="normal" font="default"> variable-rate</style></keyword><keyword><style face="normal" font="default"> water</style></keyword></keywords><dates><year Day="0" Month="0" Year="1993">1993</year></dates><isbn><style face="normal" font="default">0001-2351</style></isbn><abstract><style face="normal" font="default">A portable, near-infrared spectrophotometer was designed, fabricated, and performance tested Significant features included a circular variable filter monochromator, a fiber optic coupling for sensing of remote samples, and a software algorithm which corrected the instrument readings to a zero baseline. The instrument had a sensing range of 1650 nm to 2650 nm, an optical bandwidth of under 55 nm, and could acquire a spectrum every 200 ms. The intended use of this device was for rapid estimation of soil organic matter as a control input for variable rate herbicide application</style></abstract><notes><style face="normal" font="default">Times Cited: 17ArticleEnglishSUDDUTH, K. AUSDA ARS,CROPPING SYST &amp; WATER QUAL RES UNIT,COLUMBIA,MOCited References Count: 14KY659AMER SOC AGRICULTURAL ENGINEERS2950 NILES RD, ST JOSEPH, MI 49085-9659ST JOSEPH</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1993KY65900025</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0183-sudduth.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>182</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Sudduth,K.A.</style></author><author><style face="normal" font="default"> Hummel,J.W.</style></author></authors></contributors><auth-address><style face="normal" font="default">US AGR RES SERV,CROP PROTECT RES UNIT,URBANA,IL</style></auth-address><titles><title><style face="normal" font="default">Soil Organic-Matter, Cec, and Moisture Sensing with A Portable Nir Spectrophotometer</style></title><secondary-title><style face="normal" font="default">Transactions of the Asae</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the Asae</style></full-title></periodical><pages end="1582" start="1571">1571-1582</pages><volume><style face="normal" font="default">36</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">calibration</style></keyword><keyword><style face="normal" font="default"> CAPACITY</style></keyword><keyword><style face="normal" font="default"> cation exchange capacity</style></keyword><keyword><style face="normal" font="default"> data acquisition</style></keyword><keyword><style face="normal" font="default"> errors</style></keyword><keyword><style face="normal" font="default"> estimation</style></keyword><keyword><style face="normal" font="default"> FIELD</style></keyword><keyword><style face="normal" font="default"> field tests</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> Illinois</style></keyword><keyword><style face="normal" font="default"> MOISTURE</style></keyword><keyword><style face="normal" font="default"> near infrared</style></keyword><keyword><style face="normal" font="default"> near-infrared</style></keyword><keyword><style face="normal" font="default"> optics</style></keyword><keyword><style face="normal" font="default"> organic matter</style></keyword><keyword><style face="normal" font="default"> ORGANIC-MATTER</style></keyword><keyword><style face="normal" font="default"> prediction</style></keyword><keyword><style face="normal" font="default"> reflectance</style></keyword><keyword><style face="normal" font="default"> sensing</style></keyword><keyword><style face="normal" font="default"> sensor</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil moisture</style></keyword><keyword><style face="normal" font="default"> soil organic matter</style></keyword><keyword><style face="normal" font="default"> SOIL-MOISTURE</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> SPECTROPHOTOMETER</style></keyword><keyword><style face="normal" font="default"> spectrophotometry</style></keyword><keyword><style face="normal" font="default"> TESTS</style></keyword><keyword><style face="normal" font="default"> TIME</style></keyword><keyword><style face="normal" font="default"> variable rate application</style></keyword><keyword><style face="normal" font="default"> water</style></keyword></keywords><dates><year Day="0" Month="0" Year="1993">1993</year></dates><isbn><style face="normal" font="default">0001-2351</style></isbn><abstract><style face="normal" font="default">Soil reflectance data were collected with a portable near infrared (NIR) spectrophotometer and were correlated with soil organic matter content in laboratory and field tests. Laboratory calibrations yielded an r(2) of 0.89 and a standard error of prediction of 0.40% organic matter with 30 representative Illinois soils at 1.5 MPa and 0.033 MPa moisture tension levels. Limited in-furrow field operation produced much higher errors, due to the movement of soil past the sensor during data acquisition. Estimation of cation exchange capacity (CEC) and soil moisture content was also accomplished in the laboratory</style></abstract><notes><style face="normal" font="default">Times Cited: 22ArticleEnglishSUDDUTH, K. AUNIV MISSOURI,USDA ARS,CROPPING SYST &amp; WATER QUAL RES UNIT,AGR ENGN BLDG,COLUMBIA,MO 65211Cited References Count: 16MV974AMER SOC AGRICULTURAL ENGINEERS2950 NILES RD, ST JOSEPH, MI 49085-9659ST JOSEPH</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1993MV97400009</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0182-sudduth.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>253</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author><author><style face="normal" font="default"> Khan,M.</style></author></authors></contributors><titles><title><style face="normal" font="default">Yield loss assesment for spring wheat (Triticum aestivum) infested with Canada thistle (Cirsium arvense)</style></title><secondary-title><style face="normal" font="default">Weed Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Science</style></full-title></periodical><pages end="598" start="590">590-598</pages><volume><style face="normal" font="default">40</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">CANADA</style></keyword><keyword><style face="normal" font="default"> Canada thistle</style></keyword><keyword><style face="normal" font="default"> losses</style></keyword><keyword><style face="normal" font="default"> spring</style></keyword><keyword><style face="normal" font="default"> TRITICUM-AESTIVUM</style></keyword><keyword><style face="normal" font="default"> Triticum aestivum</style></keyword><keyword><style face="normal" font="default"> WHEAT</style></keyword><keyword><style face="normal" font="default"> YIELD</style></keyword><keyword><style face="normal" font="default"> yield losses</style></keyword></keywords><dates><year Day="0" Month="0" Year="1992">1992</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0253-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>261</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Fall-applied herbicides for Canada thistle (Cirsium arvense) root and root bud control in reduced-till spring wheat</style></title><secondary-title><style face="normal" font="default">Weed Technology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Technology</style></full-title></periodical><pages end="261" start="252">252-261</pages><volume><style face="normal" font="default">6</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">CANADA</style></keyword><keyword><style face="normal" font="default"> Canada thistle</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> ROOT</style></keyword><keyword><style face="normal" font="default"> spring</style></keyword><keyword><style face="normal" font="default"> WHEAT</style></keyword></keywords><dates><year Day="0" Month="0" Year="1992">1992</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0261-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>238</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author><author><style face="normal" font="default"> Prato,T.</style></author></authors></contributors><titles><title><style face="normal" font="default">Effectiveness and economics of repeated sequences of herbicides for Canada thistle (Cirsium arvense) control in reduced-till spring wheat (Triticum aestivum)</style></title><secondary-title><style face="normal" font="default">Journal of Plant Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Plant Science</style></full-title></periodical><pages end="618" start="599">599-618</pages><volume><style face="normal" font="default">72</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">CANADA</style></keyword><keyword><style face="normal" font="default"> Canada thistle</style></keyword><keyword><style face="normal" font="default"> economics</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> spring</style></keyword><keyword><style face="normal" font="default"> TRITICUM-AESTIVUM</style></keyword><keyword><style face="normal" font="default"> Triticum aestivum</style></keyword><keyword><style face="normal" font="default"> WHEAT</style></keyword></keywords><dates><year Day="0" Month="0" Year="1992">1992</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0238-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>252</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author><author><style face="normal" font="default"> Prato,T.</style></author></authors></contributors><titles><title><style face="normal" font="default">Efficacy and economics of herbicides for Canada thistle (Cirsium arvense) control in no-till spring wheat (Triticum aestivum)</style></title><secondary-title><style face="normal" font="default">Weed Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Science</style></full-title></periodical><pages end="240" start="233">233-240</pages><volume><style face="normal" font="default">40</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">CANADA</style></keyword><keyword><style face="normal" font="default"> Canada thistle</style></keyword><keyword><style face="normal" font="default"> economics</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> no-till</style></keyword><keyword><style face="normal" font="default"> spring</style></keyword><keyword><style face="normal" font="default"> TRITICUM-AESTIVUM</style></keyword><keyword><style face="normal" font="default"> Triticum aestivum</style></keyword><keyword><style face="normal" font="default"> WHEAT</style></keyword></keywords><dates><year Day="0" Month="0" Year="1992">1992</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0252-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>264</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Ghidey,F.</style></author><author><style face="normal" font="default"> Gregory,J.M.</style></author><author><style face="normal" font="default"> Thompson,A.L.</style></author></authors></contributors><titles><title><style face="normal" font="default">Terrace channel design and evaluation</style></title><secondary-title><style face="normal" font="default">Transactions of the ASABE</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the ASABE</style></full-title></periodical><pages end="1520" start="1513">1513-1520</pages><volume><style face="normal" font="default">35</style></volume><number><style face="normal" font="default">5</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">design</style></keyword><keyword><style face="normal" font="default"> evaluation</style></keyword></keywords><dates><year Day="0" Month="0" Year="1992">1992</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0264-ghidey.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>262</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Khan,M.</style></author><author><style face="normal" font="default"> Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Sulfonylurea herbicides reduce survival and seed production of green and yellow foxtails (Setaria spp.)</style></title><secondary-title><style face="normal" font="default">Weed Technology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Technology</style></full-title></periodical><pages end="290" start="284">284-290</pages><volume><style face="normal" font="default">6</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">GREEN</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> SEED</style></keyword></keywords><dates><year Day="0" Month="0" Year="1992">1992</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0262-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>200</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lerch,R.N.</style></author><author><style face="normal" font="default"> Barbarick,K.A.</style></author><author><style face="normal" font="default"> Sommers,L.E.</style></author><author><style face="normal" font="default"> Westfall,D.G.</style></author></authors></contributors><titles><title><style face="normal" font="default">Sewage Sludge Proteins as Labile Carbon and Nitrogen Sources</style></title><secondary-title><style face="normal" font="default">Soil Science Society of America Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil Science Society of America Journal</style></full-title></periodical><pages end="1476" start="1470">1470-1476</pages><volume><style face="normal" font="default">56</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">carbon</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword><keyword><style face="normal" font="default"> proteins</style></keyword><keyword><style face="normal" font="default"> sewage sludge</style></keyword></keywords><dates><year Day="0" Month="0" Year="1992">1992</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0200-lerch.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>243</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Herbicidal control of Cirsium arvense (L.) Scop. roots and shoots in no-till spring wheat (Triticum aestivum L.)</style></title><secondary-title><style face="normal" font="default">Weed Research</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Research</style></full-title></periodical><pages end="266" start="259">259-266</pages><volume><style face="normal" font="default">32</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">no-till</style></keyword><keyword><style face="normal" font="default"> ROOT</style></keyword><keyword><style face="normal" font="default"> roots</style></keyword><keyword><style face="normal" font="default"> SHOOTS</style></keyword><keyword><style face="normal" font="default"> spring</style></keyword><keyword><style face="normal" font="default"> TRITICUM-AESTIVUM</style></keyword><keyword><style face="normal" font="default"> Triticum aestivum</style></keyword><keyword><style face="normal" font="default"> Triticum aestivum L</style></keyword><keyword><style face="normal" font="default"> WHEAT</style></keyword></keywords><dates><year Day="0" Month="0" Year="1991">1991</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0243-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>251</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Seed survival, germination ability, and emergence of jointed goatgrass (Aegilops cylindrica)</style></title><secondary-title><style face="normal" font="default">Weed Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Science</style></full-title></periodical><pages end="216" start="210">210-216</pages><volume><style face="normal" font="default">39</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">SEED</style></keyword><keyword><style face="normal" font="default"> GERMINATION</style></keyword><keyword><style face="normal" font="default"> EMERGENCE</style></keyword></keywords><dates><year Day="0" Month="0" Year="1991">1991</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0251-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>250</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author><author><style face="normal" font="default"> Prato,T.</style></author></authors></contributors><titles><title><style face="normal" font="default">Profiable, effective herbicides for planting-time weed control in no-till spring wheat (Triticum aestivum)</style></title><secondary-title><style face="normal" font="default">Weed Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Science</style></full-title></periodical><pages end="90" start="83">83-90</pages><volume><style face="normal" font="default">39</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">herbicide</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> no-till</style></keyword><keyword><style face="normal" font="default"> spring</style></keyword><keyword><style face="normal" font="default"> TRITICUM-AESTIVUM</style></keyword><keyword><style face="normal" font="default"> Triticum aestivum</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> weed control</style></keyword><keyword><style face="normal" font="default"> WHEAT</style></keyword></keywords><dates><year Day="0" Month="0" Year="1991">1991</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0250-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>181</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Sudduth,K.A.</style></author><author><style face="normal" font="default"> Hummel,J.W.</style></author></authors></contributors><auth-address><style face="normal" font="default">USDA ARS,CROP PROTECT RES UNIT,URBANA,IL</style></auth-address><titles><title><style face="normal" font="default">Evaluation of Reflectance Methods for Soil Organic-Matter Sensing</style></title><secondary-title><style face="normal" font="default">Transactions of the Asae</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the Asae</style></full-title></periodical><pages end="1909" start="1900">1900-1909</pages><volume><style face="normal" font="default">34</style></volume><number><style face="normal" font="default">4</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">calibration</style></keyword><keyword><style face="normal" font="default"> color</style></keyword><keyword><style face="normal" font="default"> COLORIMETER</style></keyword><keyword><style face="normal" font="default"> COMPONENTS</style></keyword><keyword><style face="normal" font="default"> correlation</style></keyword><keyword><style face="normal" font="default"> evaluation</style></keyword><keyword><style face="normal" font="default"> herbicides</style></keyword><keyword><style face="normal" font="default"> Illinois</style></keyword><keyword><style face="normal" font="default"> METHODS</style></keyword><keyword><style face="normal" font="default"> mineral soils</style></keyword><keyword><style face="normal" font="default"> MOISTURE</style></keyword><keyword><style face="normal" font="default"> MULTIVARIATE CALIBRATION</style></keyword><keyword><style face="normal" font="default"> near infrared</style></keyword><keyword><style face="normal" font="default"> organic matter</style></keyword><keyword><style face="normal" font="default"> ORGANIC-MATTER</style></keyword><keyword><style face="normal" font="default"> prediction</style></keyword><keyword><style face="normal" font="default"> principal components</style></keyword><keyword><style face="normal" font="default"> reflectance</style></keyword><keyword><style face="normal" font="default"> sensing</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil color</style></keyword><keyword><style face="normal" font="default"> soil organic matter</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword><keyword><style face="normal" font="default"> spectral</style></keyword><keyword><style face="normal" font="default"> SPECTROPHOTOMETER</style></keyword><keyword><style face="normal" font="default"> spectrophotometry</style></keyword><keyword><style face="normal" font="default"> TIME</style></keyword><keyword><style face="normal" font="default"> USDA</style></keyword><keyword><style face="normal" font="default"> water</style></keyword></keywords><dates><year Day="0" Month="0" Year="1991">1991</year></dates><isbn><style face="normal" font="default">0001-2351</style></isbn><abstract><style face="normal" font="default">Multivariate calibration methods, including stepwise multiple linear regression, principal components regression, and partial least squares regression, were applied to soil color and spectral reflectance data to predict the organic matter content of Illinois soils. Data were obtained with a visible/near infrared (NIR) spectrophotometer and a commercial colorimeter on a calibration set consisting of 30 Illinois mineral soils at 0.033 MPa and 1.5 MPa moisture tension levels. Good correlation with soil organic matter (r2 = 0.91, standard error of prediction = 0.34% organic matter) was obtained when using as few as 12 NIR reflectance data points in the range from 1720 to 2380 nm. Color coordinate and visible reflectance data provided considerably poorer predictions of soil organic matter content</style></abstract><notes><style face="normal" font="default">Times Cited: 15ArticleEnglishSUDDUTH, K. AUSDA ARS,CROPPING SYST &amp; WATER QUAL RES UNIT,COLUMBIA,MOCited References Count: 27GX298AMER SOC AGRICULTURAL ENGINEERS2950 NILES RD, ST JOSEPH, MI 49085-9659ST JOSEPH</style></notes><urls><web-urls><url ppv-ref="no">ISI:A1991GX29800066</url></web-urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0181-sudduth.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>300</rec-number><ref-type name="Book Chapter">3</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author><author><style face="normal" font="default"> Nalewaja,J.D.</style></author></authors></contributors><titles><title><style face="normal" font="default">Northern Great Plains</style></title><alt-title><style face="normal" font="default">Systems of Weed Control in North America</style></alt-title></titles><periodical/><pages end="126" start="90">90-126</pages><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">SYSTEMS</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> weed control</style></keyword></keywords><dates><year Day="0" Month="0" Year="1990">1990</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0300-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>302</rec-number><ref-type name="Book Chapter">3</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Difenzoquat</style></title><alt-title><style face="normal" font="default">Systems of Weed Control in North America</style></alt-title></titles><periodical/><pages end="320" start="298">298-320</pages><number><style face="normal" font="default">14</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">SYSTEMS</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> weed control</style></keyword></keywords><dates><year Day="0" Month="0" Year="1990">1990</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0302-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>301</rec-number><ref-type name="Book Chapter">3</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Introduction</style></title><alt-title><style face="normal" font="default">Systems of Weed Control in North America</style></alt-title></titles><periodical/><pages end="10" start="1">1-10</pages><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">SYSTEMS</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> weed control</style></keyword></keywords><dates><year Day="0" Month="0" Year="1990">1990</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0301-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>303</rec-number><ref-type name="Book Chapter">3</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Sulfonylurea Herbicides</style></title><alt-title><style face="normal" font="default">Systems of Weed Control in North America</style></alt-title></titles><periodical/><pages end="476" start="423">423-476</pages><number><style face="normal" font="default">21</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">herbicides</style></keyword><keyword><style face="normal" font="default"> herbicide</style></keyword><keyword><style face="normal" font="default"> SYSTEMS</style></keyword><keyword><style face="normal" font="default"> SYSTEM</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> weed control</style></keyword></keywords><dates><year Day="0" Month="0" Year="1990">1990</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0303-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>241</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Management and control of Canada thistle (Cirsium arvense)</style></title><secondary-title><style face="normal" font="default">Reviews of Weed Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Reviews of Weed Science</style></full-title></periodical><pages end="250" start="193">193-250</pages><volume><style face="normal" font="default">5</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">CANADA</style></keyword><keyword><style face="normal" font="default"> Canada thistle</style></keyword><keyword><style face="normal" font="default"> management</style></keyword></keywords><dates><year Day="0" Month="0" Year="1990">1990</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0241-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>259</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Primary tillage for foxtail barley (Hordeum jubatum) control</style></title><secondary-title><style face="normal" font="default">Weed Technology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Technology</style></full-title></periodical><pages end="321" start="318">318-321</pages><volume><style face="normal" font="default">4</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">barley</style></keyword><keyword><style face="normal" font="default"> tillage</style></keyword></keywords><dates><year Day="0" Month="0" Year="1990">1990</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0259-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>379</rec-number><ref-type name="Conference Proceeding">12</ref-type><contributors><authors><author><style face="normal" font="default">Hjelmfelt,A.T.</style></author><author><style face="normal" font="default"> Kramer,L.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Influence of tillage on hydrology in western Iowa</style></title><secondary-title><style face="normal" font="default">Watershed Planning and Analysis in Action</style></secondary-title><alt-title><style face="normal" font="default">IR Conference Watershed Mgt/IR Div/ASCE</style></alt-title></titles><periodical><full-title><style face="normal" font="System">Watershed Planning and Analysis in Action</style></full-title></periodical><pages end="414" start="405">405-414</pages><edition><style face="normal" font="default">Durango, CO</style></edition><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">tillage</style></keyword><keyword><style face="normal" font="default"> hydrology</style></keyword><keyword><style face="normal" font="default"> Iowa</style></keyword><keyword><style face="normal" font="default"> watershed</style></keyword></keywords><dates><year Day="0" Month="0" Year="1990">1990</year><pub-dates><date Day="9" Month="7" Year="1990">1990/7/9</date></pub-dates></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0379-hjelmfelt.pdf</url></pdf-urls></urls><misc2><style face="normal" font="default">Durango, CO</style></misc2></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>205</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kremer,R.J.</style></author><author><style face="normal" font="default"> Begonia,M.F.</style></author><author><style face="normal" font="default"> Stanley,L.</style></author><author><style face="normal" font="default"> Lanham,E.T.</style></author></authors></contributors><titles><title><style face="normal" font="default">Characterization of Rhizobacteria Associated with Weed Seedlings</style></title><secondary-title><style face="normal" font="default">Applied and Environmental Microbiology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Applied and Environmental Microbiology</style></full-title></periodical><pages end="1655" start="1649">1649-1655</pages><volume><style face="normal" font="default">56</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">characterization</style></keyword><keyword><style face="normal" font="default"> RHIZOBACTERIA</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> weed seedlings</style></keyword><keyword><style face="normal" font="default"> SEEDLINGS</style></keyword></keywords><dates><year Day="0" Month="0" Year="1990">1990</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0205-kremer.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>199</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lerch,R.N.</style></author><author><style face="normal" font="default"> Barbarick,K.A.</style></author><author><style face="normal" font="default"> Westfall,D.G.</style></author><author><style face="normal" font="default"> Follett,R.H.</style></author><author><style face="normal" font="default"> McBride,T.M.</style></author><author><style face="normal" font="default"> Owen,W.F.</style></author></authors></contributors><titles><title><style face="normal" font="default">Sustainable Rates of Sewage Sludge for Dryland Winter Wheat Production I. Soil Nitrogen and Heavy Metals</style></title><secondary-title><style face="normal" font="default">Journal of Production Agriculture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Production Agriculture</style></full-title></periodical><pages end="65" start="60">60-65</pages><volume><style face="normal" font="default">3</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">heavy metals</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword><keyword><style face="normal" font="default"> RATES</style></keyword><keyword><style face="normal" font="default"> sewage sludge</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> WHEAT</style></keyword><keyword><style face="normal" font="default"> WINTER</style></keyword><keyword><style face="normal" font="default"> winter wheat</style></keyword><keyword><style face="normal" font="default"> WINTER-WHEAT</style></keyword></keywords><dates><year Day="0" Month="0" Year="1990">1990</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0199-lerch.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>387</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Lerch,R.N.</style></author><author><style face="normal" font="default"> Barbarick,K.A.</style></author><author><style face="normal" font="default"> Westfall,D.G.</style></author><author><style face="normal" font="default"> Follett,R.H.</style></author><author><style face="normal" font="default"> McBride,T.M.</style></author><author><style face="normal" font="default"> Owen,W.F.</style></author></authors></contributors><titles><title><style face="normal" font="default">Sustainable Rates of Sewage Sludge for Dryland Winter Wheat Production II. Production and Income</style></title><secondary-title><style face="normal" font="default">Journal of Production Agriculture</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Production Agriculture</style></full-title></periodical><pages end="71" start="66">66-71</pages><volume><style face="normal" font="default">3</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">heavy metals</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword><keyword><style face="normal" font="default"> RATES</style></keyword><keyword><style face="normal" font="default"> sewage sludge</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> WHEAT</style></keyword><keyword><style face="normal" font="default"> WINTER</style></keyword><keyword><style face="normal" font="default"> winter wheat</style></keyword><keyword><style face="normal" font="default"> WINTER-WHEAT</style></keyword></keywords><dates><year Day="0" Month="0" Year="1990">1990</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0387-lerch.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>337</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Nearing,M.A.</style></author><author><style face="normal" font="default"> Alberts,E.E.</style></author><author><style face="normal" font="default"> Laflen,J.M.</style></author></authors></contributors><titles><title><style face="normal" font="default">Prediction technology for soil erosion by water: status and research needs</style></title><secondary-title><style face="normal" font="default">Soil Science Society of America Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil Science Society of America Journal</style></full-title></periodical><pages end="1711" start="1702">1702-1711</pages><volume><style face="normal" font="default">54</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">prediction</style></keyword><keyword><style face="normal" font="default"> PREDICTION TECHNOLOGY</style></keyword><keyword><style face="normal" font="default"> technology</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SOIL EROSION</style></keyword><keyword><style face="normal" font="default"> EROSION</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> research</style></keyword></keywords><dates><year Day="0" Month="0" Year="1990">1990</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0337-nearing.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>388</rec-number><ref-type name="Report">24</ref-type><contributors><authors><author><style face="normal" font="default">Alberts,E.E.</style></author><author><style face="normal" font="default"> Laflen,J.M.</style></author><author><style face="normal" font="default"> Rawls,W.J.</style></author><author><style face="normal" font="default"> Simanton,J.R.</style></author><author><style face="normal" font="default"> Nearing,M.A.</style></author></authors><secondary-authors><author><style face="normal" font="default">Lane,L.J.</style></author><author><style face="normal" font="default"> Nearing,M.A.</style></author></secondary-authors></contributors><titles><title><style face="normal" font="default">USDA - Water Erosion Prediction Project: Hillslope Profile Model Documentation Chapter 6: Soil Component</style></title></titles><periodical/><pages end="6.15" start="6.1">6.1-6.15</pages><volume><style face="normal" font="default">2</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">USDA</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> EROSION</style></keyword><keyword><style face="normal" font="default"> prediction</style></keyword><keyword><style face="normal" font="default"> MODEL</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword></keywords><dates><year Day="0" Month="0" Year="1989">1989</year></dates><pub-location><style face="normal" font="default">West Lafayette, Indiana 47907</style></pub-location><publisher><style face="normal" font="default">USDA-ARS National Soil Erosion Research Laboratory</style></publisher><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0388-alberts.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>389</rec-number><ref-type name="Report">24</ref-type><contributors><authors><author><style face="normal" font="default">Alberts,E.E.</style></author><author><style face="normal" font="default"> Weltz,M.A.</style></author><author><style face="normal" font="default"> Ghidey,F.</style></author></authors><secondary-authors><author><style face="normal" font="default">Lane,L.J.</style></author><author><style face="normal" font="default"> Nearing,M.A.</style></author></secondary-authors></contributors><titles><title><style face="normal" font="default">USDA - Water Erosion Prediction Project: Hillslope Profile Model Documentation Chapter 8: Plant Growth Component</style></title></titles><periodical/><pages end="8.38" start="8.1">8.1-8.38</pages><volume><style face="normal" font="default">2</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">USDA</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> EROSION</style></keyword><keyword><style face="normal" font="default"> prediction</style></keyword><keyword><style face="normal" font="default"> MODEL</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> PLANT</style></keyword><keyword><style face="normal" font="default"> PLANT-GROWTH</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword></keywords><dates><year Day="0" Month="0" Year="1989">1989</year></dates><pub-location><style face="normal" font="default">West Lafayette, Indiana 47907</style></pub-location><publisher><style face="normal" font="default">USDA-ARS National Soil Erosion Research Laboratory</style></publisher><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0389-alberts.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>209</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kremer,R.J.</style></author><author><style face="normal" font="default"> Schulte,L.K.</style></author></authors></contributors><titles><title><style face="normal" font="default">Influence of chemical treatment and </style><style face="italic" font="default">Fusarium oxysporum</style><style face="normal" font="default"> on velvetleaf (A</style><style face="italic" font="default">butilon theophrasti</style><style face="normal" font="default">)</style></title><secondary-title><style face="normal" font="default">Weed Technology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Technology</style></full-title></periodical><pages end="374" start="369">369-374</pages><volume><style face="normal" font="default">3</style></volume><reprint-status status="no-file"/><keywords/><dates><year Day="0" Month="0" Year="1989">1989</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0209-kremer.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>204</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kremer,R.J.</style></author><author><style face="normal" font="default"> Spencer,N.R.</style></author></authors></contributors><titles><title><style face="normal" font="default">Interaction of Insects, Fungi, and Burial on Velvetleaf (</style><style face="italic" font="default">Abutilon theophrasti</style><style face="normal" font="default">) Seed Viability</style></title><secondary-title><style face="normal" font="default">Weed Technology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Technology</style></full-title></periodical><pages end="326" start="322">322-326</pages><volume><style face="normal" font="default">3</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">FUNGI</style></keyword><keyword><style face="normal" font="default"> SEED</style></keyword></keywords><dates><year Day="0" Month="0" Year="1989">1989</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0204-kremer.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>203</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kremer,R.J.</style></author><author><style face="normal" font="default"> Spencer,N.R.</style></author></authors></contributors><titles><title><style face="normal" font="default">Impact of a Seed-Feeding Insect and Microorganisms on Velvetleaf (</style><style face="italic" font="default">Abutilon theophrasti</style><style face="normal" font="default">) Seed Viability</style></title><secondary-title><style face="normal" font="default">Weed Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Science</style></full-title></periodical><pages end="216" start="211">211-216</pages><volume><style face="normal" font="default">37</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">IMPACT</style></keyword><keyword><style face="normal" font="default"> MICROORGANISMS</style></keyword><keyword><style face="normal" font="default"> SEED</style></keyword></keywords><dates><year Day="0" Month="0" Year="1989">1989</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0203-kremer.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>242</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Carlson,S.J.</style></author><author><style face="normal" font="default"> Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Glyphosate effects on Canada thistle (cirsium arvense) roots, root buds, and shoots</style></title><secondary-title><style face="normal" font="default">Weed Research</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Research</style></full-title></periodical><pages end="45" start="37">37-45</pages><volume><style face="normal" font="default">28</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">glyphosate</style></keyword><keyword><style face="normal" font="default"> CANADA</style></keyword><keyword><style face="normal" font="default"> Canada thistle</style></keyword><keyword><style face="normal" font="default"> roots</style></keyword><keyword><style face="normal" font="default"> ROOT</style></keyword><keyword><style face="normal" font="default"> SHOOTS</style></keyword></keywords><dates><year Day="0" Month="0" Year="1988">1988</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0242-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>249</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Clopyralid effects on shoot emergence, root biomass, and secondary shoot regrowth potential of Canada thistle (Cirsium arvense)</style></title><secondary-title><style face="normal" font="default">Weed Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Science</style></full-title></periodical><pages end="809" start="804">804-809</pages><volume><style face="normal" font="default">36</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">biomass</style></keyword><keyword><style face="normal" font="default"> CANADA</style></keyword><keyword><style face="normal" font="default"> Canada thistle</style></keyword><keyword><style face="normal" font="default"> EMERGENCE</style></keyword><keyword><style face="normal" font="default"> ROOT</style></keyword></keywords><dates><year Day="0" Month="0" Year="1988">1988</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0249-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>256</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Effect of soil-applied chlorsulfuron on Canada thistle (Cirsium arvense) root and root bud growth</style></title><secondary-title><style face="normal" font="default">Weed Technology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Technology</style></full-title></periodical><pages end="161" start="154">154-161</pages><volume><style face="normal" font="default">1</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">CANADA</style></keyword><keyword><style face="normal" font="default"> Canada thistle</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> ROOT</style></keyword></keywords><dates><year Day="0" Month="0" Year="1987">1987</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0256-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>248</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author><author><style face="normal" font="default"> Zimdahl,R.L.</style></author></authors></contributors><titles><title><style face="normal" font="default">Persistance, germinability, and distribution of jointed goatgrass (aegilopis cylindrica) seed in soil</style></title><secondary-title><style face="normal" font="default">Weed Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Science</style></full-title></periodical><pages end="154" start="149">149-154</pages><volume><style face="normal" font="default">35</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">distribution</style></keyword><keyword><style face="normal" font="default"> SEED</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword></keywords><dates><year Day="0" Month="0" Year="1987">1987</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0248-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>338</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Gantzer,C.J.</style></author><author><style face="normal" font="default"> Buyanovsky,G.A.</style></author><author><style face="normal" font="default"> Alberts,E.E.</style></author><author><style face="normal" font="default"> Remley,P.A.</style></author></authors></contributors><titles><title><style face="normal" font="default">Effects of soybean and corn residue decomposition on soil strength and splash detachment</style></title><secondary-title><style face="normal" font="default">Soil Science Society of America Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil Science Society of America Journal</style></full-title></periodical><pages end="206" start="202">202-206</pages><volume><style face="normal" font="default">51</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">corn</style></keyword><keyword><style face="normal" font="default"> RESIDUE</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soil strength</style></keyword><keyword><style face="normal" font="default"> soybean</style></keyword><keyword><style face="normal" font="default"> strength</style></keyword></keywords><dates><year Day="0" Month="0" Year="1987">1987</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0338-gantzer.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>206</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Kremer,R.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Identity and Properties of Bacteria Inhabiting Seeds of Selected Broadleaf Weed Species</style></title><secondary-title><style face="normal" font="default">Microbial Ecology</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Microbial Ecology</style></full-title></periodical><pages end="37" start="29">29-37</pages><volume><style face="normal" font="default">14</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">BACTERIA</style></keyword><keyword><style face="normal" font="default"> SEEDS</style></keyword><keyword><style face="normal" font="default"> SEED</style></keyword><keyword><style face="normal" font="default"> weed</style></keyword><keyword><style face="normal" font="default"> species</style></keyword></keywords><dates><year Day="0" Month="0" Year="1987">1987</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0206-kremer.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>247</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Carlson,S.J.</style></author><author><style face="normal" font="default"> Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">A washer for removing thickened roots from soil</style></title><secondary-title><style face="normal" font="default">Weed Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Science</style></full-title></periodical><pages end="799" start="794">794-799</pages><volume><style face="normal" font="default">34</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">ROOT</style></keyword><keyword><style face="normal" font="default"> roots</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword></keywords><dates><year Day="0" Month="0" Year="1986">1986</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0247-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>339</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Wendt,R.C.</style></author><author><style face="normal" font="default"> Alberts,E.E.</style></author><author><style face="normal" font="default"> Hjelmfelt,A.T.</style></author></authors></contributors><titles><title><style face="normal" font="default">Variability of runoff and soil loss from fallow experimental plots</style></title><secondary-title><style face="normal" font="default">Soil Science Society of America Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil Science Society of America Journal</style></full-title></periodical><pages end="736" start="730">730-736</pages><volume><style face="normal" font="default">50</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">fallow</style></keyword><keyword><style face="normal" font="default"> losses</style></keyword><keyword><style face="normal" font="default"> PLOTS</style></keyword><keyword><style face="normal" font="default"> runoff</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> SOIL LOSS</style></keyword><keyword><style face="normal" font="default"> VARIABILITY</style></keyword></keywords><dates><year Day="0" Month="0" Year="1986">1986</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0339-wendt.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>340</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Alberts,E.E.</style></author><author><style face="normal" font="default"> Wendt,R.C.</style></author></authors></contributors><titles><title><style face="normal" font="default">Influence of soybean and corn cropping on soil aggregate size and stability</style></title><secondary-title><style face="normal" font="default">Soil Science Society of America Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil Science Society of America Journal</style></full-title></periodical><pages end="1537" start="1534">1534-1537</pages><volume><style face="normal" font="default">49</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">corn</style></keyword><keyword><style face="normal" font="default"> size</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> soybean</style></keyword></keywords><dates><year Day="0" Month="0" Year="1985">1985</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0340-alberts.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>391</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Alberts,E.E.</style></author><author><style face="normal" font="default"> Spomer,R.G.</style></author></authors></contributors><titles><title><style face="normal" font="default">Dissolved nitrogen and phosphorus in runoff from watersheds in conservation and conventional tillage</style></title><secondary-title><style face="normal" font="default">Journal of Soil and Water Conservation</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Soil and Water Conservation</style></full-title></periodical><pages end="157" start="153">153-157</pages><volume><style face="normal" font="default">40</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">nitrogen</style></keyword><keyword><style face="normal" font="default"> phosphorus</style></keyword><keyword><style face="normal" font="default"> runoff</style></keyword><keyword><style face="normal" font="default"> watersheds</style></keyword><keyword><style face="normal" font="default"> watershed</style></keyword><keyword><style face="normal" font="default"> CONVENTIONAL TILLAGE</style></keyword><keyword><style face="normal" font="default"> tillage</style></keyword></keywords><dates><year Day="0" Month="0" Year="1985">1985</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0391-alberts.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>263</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Ghidey,F.</style></author><author><style face="normal" font="default"> Gregory,J.M.</style></author><author><style face="normal" font="default"> McCarty,T.R.</style></author><author><style face="normal" font="default"> Alberts,E.E.</style></author></authors></contributors><titles><title><style face="normal" font="default">Residue decay evaluation and prediction</style></title><secondary-title><style face="normal" font="default">Transactions of the ASABE</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the ASABE</style></full-title></periodical><pages end="105" start="102">102-105</pages><volume><style face="normal" font="default">28</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">evaluation</style></keyword><keyword><style face="normal" font="default"> prediction</style></keyword><keyword><style face="normal" font="default"> RESIDUE</style></keyword></keywords><dates><year Day="0" Month="0" Year="1985">1985</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0263-ghidey.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>453</rec-number><ref-type name="Conference Proceeding">12</ref-type><contributors><authors><author><style face="normal" font="default">Wendt,R.C.</style></author></authors></contributors><titles><title><style face="normal" font="default">Soil and water factors affecting EPC</style></title><secondary-title><style face="normal" font="default">Proceedings of the Natural Resources Modeling Symposium</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Proceedings of the Natural Resources Modeling Symposium</style></full-title></periodical><pages end="154" start="151">151-154</pages><edition><style face="normal" font="default">Pingree Park, CO</style></edition><reprint-status status="in-file"/><keywords><keyword><style face="normal" font="default">soil</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> MODELING</style></keyword></keywords><dates><year Day="0" Month="0" Year="1985">1985</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-t5218-wendt.pdf</url></pdf-urls></urls><misc2><style face="normal" font="default">Pingree Park, CO</style></misc2></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>244</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Chlorsulfuron effects on shoot growth and root buds of Canada thistle (Cirsium arvense)</style></title><secondary-title><style face="normal" font="default">Weed Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Science</style></full-title></periodical><pages end="50" start="42">42-50</pages><volume><style face="normal" font="default">32</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">CANADA</style></keyword><keyword><style face="normal" font="default"> Canada thistle</style></keyword><keyword><style face="normal" font="default"> growth</style></keyword><keyword><style face="normal" font="default"> ROOT</style></keyword></keywords><dates><year Day="0" Month="0" Year="1984">1984</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0244-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>245</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Vernalization requirements for flowering of jointed goatgrass (Aegilops cylindrica)</style></title><secondary-title><style face="normal" font="default">Weed Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Weed Science</style></full-title></periodical><pages end="637" start="631">631-637</pages><volume><style face="normal" font="default">32</style></volume><reprint-status status="no-file"/><keywords/><dates><year Day="0" Month="0" Year="1984">1984</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0245-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>392</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Spomer,R.G.</style></author><author><style face="normal" font="default"> Hjelmfelt,A.T.</style></author></authors></contributors><titles><title><style face="normal" font="default">Soil moisture response to cropping and tillage on western Iowa loess soils.</style></title><secondary-title><style face="normal" font="default">Transactions of the Asae</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the Asae</style></full-title></periodical><pages end="826" start="822">822-826</pages><volume><style face="normal" font="default">2</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">soil</style></keyword><keyword><style face="normal" font="default"> soil moisture</style></keyword><keyword><style face="normal" font="default"> SOIL-MOISTURE</style></keyword><keyword><style face="normal" font="default"> MOISTURE</style></keyword><keyword><style face="normal" font="default"> tillage</style></keyword><keyword><style face="normal" font="default"> Iowa</style></keyword><keyword><style face="normal" font="default"> SOILS</style></keyword></keywords><dates><year Day="0" Month="0" Year="1984">1984</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0392-spomer.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>341</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Alberts,E.E.</style></author><author><style face="normal" font="default"> Neibling,W.H.</style></author><author><style face="normal" font="default"> Moldenhauer,W.C.</style></author></authors></contributors><titles><title><style face="normal" font="default">Transport of sediment nitrogen and phosphorus through cornstalk residue strips</style></title><secondary-title><style face="normal" font="default">Soil Science Society of America Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil Science Society of America Journal</style></full-title></periodical><pages end="1184" start="1177">1177-1184</pages><volume><style face="normal" font="default">45</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">nitrogen</style></keyword><keyword><style face="normal" font="default"> phosphorus</style></keyword><keyword><style face="normal" font="default"> RESIDUE</style></keyword><keyword><style face="normal" font="default"> SEDIMENT</style></keyword><keyword><style face="normal" font="default"> transport</style></keyword></keywords><dates><year Day="0" Month="0" Year="1981">1981</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0341-alberts.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>342</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Alberts,E.E.</style></author><author><style face="normal" font="default"> Moldenhauer,W.C.</style></author><author><style face="normal" font="default"> Foster,G.R.</style></author></authors></contributors><titles><title><style face="normal" font="default">Soil aggregates and primary particles transported in rill and interril flow</style></title><secondary-title><style face="normal" font="default">Soil Science Society of America Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil Science Society of America Journal</style></full-title></periodical><pages end="595" start="590">590-595</pages><volume><style face="normal" font="default">44</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">FLOW</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword></keywords><dates><year Day="0" Month="0" Year="1980">1980</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0342-alberts.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>390</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Alberts,E.E.</style></author><author><style face="normal" font="default"> Schuman,G.E.</style></author><author><style face="normal" font="default"> Burwell,R.E.</style></author></authors></contributors><titles><title><style face="normal" font="default">Seasonal Runoff Losses of Nitrogen and Phosphorus from Missouri Valley Loess Watersheds</style></title><secondary-title><style face="normal" font="default">Journal of Environmental Quality</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Environmental Quality</style></full-title></periodical><pages end="207" start="203">203-207</pages><volume><style face="normal" font="default">7</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">runoff</style></keyword><keyword><style face="normal" font="default"> RUNOFF LOSSES</style></keyword><keyword><style face="normal" font="default"> losses</style></keyword><keyword><style face="normal" font="default"> nitrogen</style></keyword><keyword><style face="normal" font="default"> phosphorus</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> watersheds</style></keyword><keyword><style face="normal" font="default"> watershed</style></keyword></keywords><dates><year Day="0" Month="0" Year="1978">1978</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-t5688-alberts.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>343</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Alberts,E.E.</style></author><author><style face="normal" font="default"> Burwell,R.E.</style></author><author><style face="normal" font="default"> Schuman,G.E.</style></author></authors></contributors><titles><title><style face="normal" font="default">Soil nitrate-nitrogen determined by coring and solution extraction techniques</style></title><secondary-title><style face="normal" font="default">Soil Science Society of America Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil Science Society of America Journal</style></full-title></periodical><pages end="92" start="90">90-92</pages><volume><style face="normal" font="default">41</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">extraction</style></keyword><keyword><style face="normal" font="default"> nitrate nitrogen</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword></keywords><dates><year Day="0" Month="0" Year="1977">1977</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0343-alberts.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>344</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Bradford,J.M.</style></author><author><style face="normal" font="default"> Blanchar,R.W.</style></author></authors></contributors><titles><title><style face="normal" font="default">Profile modification of a Fragiudalf to increase crop production</style></title><secondary-title><style face="normal" font="default">Soil Science Society of America Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil Science Society of America Journal</style></full-title></periodical><pages end="131" start="127">127-131</pages><volume><style face="normal" font="default">41</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">CROP</style></keyword><keyword><style face="normal" font="default"> crop production</style></keyword></keywords><dates><year Day="0" Month="0" Year="1977">1977</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0344-bradford.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>240</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Donald,W.W.</style></author><author><style face="normal" font="default"> Mirocha,C.J.</style></author></authors></contributors><titles><title><style face="normal" font="default">Chitin as a measure of fungal growth in stored corn and soybean seed</style></title><secondary-title><style face="normal" font="default">Cereal Chemistry</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Cereal Chemistry</style></full-title></periodical><pages end="474" start="466">466-474</pages><volume><style face="normal" font="default">54</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">growth</style></keyword><keyword><style face="normal" font="default"> corn</style></keyword><keyword><style face="normal" font="default"> soybean</style></keyword><keyword><style face="normal" font="default"> SEED</style></keyword></keywords><dates><year Day="0" Month="0" Year="1977">1977</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0240-donald.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>370</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Amerman,C.R.</style></author></authors></contributors><titles><title><style face="normal" font="default">Soil Water Modeling I: A Generalized Simulator of Steady, Two-Dimensional Flow</style></title><secondary-title><style face="normal" font="default">Soil Science Society of America Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil Science Society of America Journal</style></full-title></periodical><pages end="470" start="466">466-470</pages><volume><style face="normal" font="default">19</style></volume><number><style face="normal" font="default">3</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">soil</style></keyword><keyword><style face="normal" font="default"> soil water</style></keyword><keyword><style face="normal" font="default"> water</style></keyword><keyword><style face="normal" font="default"> MODELING</style></keyword><keyword><style face="normal" font="default"> FLOW</style></keyword></keywords><dates><year Day="0" Month="0" Year="1976">1976</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0370-amerman.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>382</rec-number><ref-type name="Conference Proceeding">12</ref-type><contributors><authors><author><style face="normal" font="default">Amerman,C.R.</style></author></authors><secondary-authors><author><style face="normal" font="default">Larson,W.E.</style></author></secondary-authors></contributors><titles><title><style face="normal" font="default">Tillage and hydrology</style></title><secondary-title><style face="normal" font="default">Research Progress and Needs Conservation Tillage</style></secondary-title><alt-title><style face="normal" font="default">North Central Region ARS USDA Soil Tillage Research Workshop</style></alt-title></titles><periodical><full-title><style face="normal" font="System">Research Progress and Needs Conservation Tillage</style></full-title></periodical><pages end="81" start="73">73-81</pages><edition><style face="normal" font="default">Council Bluffs, IA</style></edition><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">USDA</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> tillage</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> NUTRIENT LOSSES</style></keyword><keyword><style face="normal" font="default"> losses</style></keyword><keyword><style face="normal" font="default"> hydrology</style></keyword></keywords><dates><year Day="0" Month="0" Year="1976">1976</year><pub-dates><date Day="6" Month="1" Year="1976">1976/1/6</date></pub-dates></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0382-amerman.pdf</url></pdf-urls></urls><misc2><style face="normal" font="default">Council Bluffs, IA</style></misc2></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>369</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Burwell,R.E.</style></author><author><style face="normal" font="default"> Schuman,G.E.</style></author><author><style face="normal" font="default"> Saxton,K.E.</style></author><author><style face="normal" font="default"> Heinemann,H.G.</style></author></authors></contributors><titles><title><style face="normal" font="default">Nitrogen in Subsurface Discharge from Agricultural Watersheds</style></title><secondary-title><style face="normal" font="default">Journal of Environmental Quality</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Environmental Quality</style></full-title></periodical><pages end="329" start="325">325-329</pages><volume><style face="normal" font="default">3</style></volume><number><style face="normal" font="default">5</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">nitrogen</style></keyword><keyword><style face="normal" font="default"> DISCHARGE</style></keyword><keyword><style face="normal" font="default"> watersheds</style></keyword><keyword><style face="normal" font="default"> watershed</style></keyword></keywords><dates><year Day="0" Month="0" Year="1976">1976</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0369-burwell.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>381</rec-number><ref-type name="Conference Proceeding">12</ref-type><contributors><authors><author><style face="normal" font="default">Burwell,R.E.</style></author></authors><secondary-authors><author><style face="normal" font="default">Larson,W.E.</style></author></secondary-authors></contributors><titles><title><style face="normal" font="default">Nutrient loss research</style></title><secondary-title><style face="normal" font="default">Research Progress and Needs Conservation Tillage</style></secondary-title><alt-title><style face="normal" font="default">North Central Region ARS USDA Soil Tillage Research Workshop</style></alt-title></titles><periodical><full-title><style face="normal" font="System">Research Progress and Needs Conservation Tillage</style></full-title></periodical><pages end="34" start="28">28-34</pages><edition><style face="normal" font="default">Council Bluffs, IA</style></edition><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">USDA</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> tillage</style></keyword><keyword><style face="normal" font="default"> research</style></keyword><keyword><style face="normal" font="default"> NUTRIENT LOSSES</style></keyword><keyword><style face="normal" font="default"> losses</style></keyword></keywords><dates><year Day="0" Month="0" Year="1976">1976</year><pub-dates><date Day="6" Month="1" Year="1976">1976/1/6</date></pub-dates></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-0381-burwell.pdf</url></pdf-urls></urls><misc2><style face="normal" font="default">Council Bluffs, IA</style></misc2></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>368</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Schuman,G.E.</style></author><author><style face="normal" font="default"> McCalla,T.M.</style></author><author><style face="normal" font="default"> Saxton,K.E.</style></author><author><style face="normal" font="default"> Knox,H.T.</style></author></authors></contributors><titles><title><style face="normal" font="default">Nitrate movement and its distribution in the soil profile of differentially fertilized corn watersheds</style></title><secondary-title><style face="normal" font="default">Soil Science Society of America Journal</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Soil Science Society of America Journal</style></full-title></periodical><pages end="1197" start="1192">1192-1197</pages><volume><style face="normal" font="default">39</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">corn</style></keyword><keyword><style face="normal" font="default"> distribution</style></keyword><keyword><style face="normal" font="default"> NITRATE</style></keyword><keyword><style face="normal" font="default"> NITRATE MOVEMENT</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> watershed</style></keyword><keyword><style face="normal" font="default"> watersheds</style></keyword></keywords><dates><year Day="0" Month="0" Year="1975">1975</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-t4443-schuman.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>393</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Schuman,G.E.</style></author><author><style face="normal" font="default"> Burwell,R.E.</style></author><author><style face="normal" font="default"> Piest,R.F.</style></author><author><style face="normal" font="default"> Spomer,R.G.</style></author></authors></contributors><titles><title><style face="normal" font="default">Nitrogen losses in surface runoff from agricultural watersheds on Missouri Valley loess.</style></title><secondary-title><style face="normal" font="default">Journal of Environmental Quality</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Environmental Quality</style></full-title></periodical><pages end="302" start="299">299-302</pages><volume><style face="normal" font="default">2</style></volume><number><style face="normal" font="default">2</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">nitrogen</style></keyword><keyword><style face="normal" font="default"> losses</style></keyword><keyword><style face="normal" font="default"> SURFACE</style></keyword><keyword><style face="normal" font="default"> runoff</style></keyword><keyword><style face="normal" font="default"> watersheds</style></keyword><keyword><style face="normal" font="default"> watershed</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword></keywords><dates><year Day="0" Month="0" Year="1973">1973</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-t4461-schuman.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>366</rec-number><ref-type name="Report">24</ref-type><contributors><authors><author><style face="normal" font="default">Eagleman,J.R.</style></author><author><style face="normal" font="default"> Jamison,V.C.</style></author></authors></contributors><titles><title><style face="normal" font="default">The influence of soil textural stratification and compaction on moisture flow</style></title></titles><periodical/><pages end="14" start="1">1-14</pages><volume><style face="normal" font="default">784</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">soil</style></keyword><keyword><style face="normal" font="default"> compaction</style></keyword><keyword><style face="normal" font="default"> MOISTURE</style></keyword><keyword><style face="normal" font="default"> FLOW</style></keyword></keywords><dates><year Day="0" Month="0" Year="1961">1961</year></dates><publisher><style face="normal" font="default">University of Missouri Agricultural Experiment Station Research Bulletin</style></publisher><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-t2151-eagleman.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>365</rec-number><ref-type name="Report">24</ref-type><contributors><authors><author><style face="normal" font="default">Heinemann,H.G.</style></author></authors></contributors><titles><title><style face="normal" font="default">Sediment distribution in small floodwater-retarding reservoirs in the Missouri basin loess hills</style></title></titles><periodical/><pages end="37" start="1">1-37</pages><volume><style face="normal" font="default">41-44</style></volume><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">SEDIMENT</style></keyword><keyword><style face="normal" font="default"> distribution</style></keyword><keyword><style face="normal" font="default"> RESERVOIRS</style></keyword><keyword><style face="normal" font="default"> Missouri</style></keyword><keyword><style face="normal" font="default"> BASIN</style></keyword><keyword><style face="normal" font="default"> USDA</style></keyword></keywords><dates><year Day="0" Month="0" Year="1961">1961</year></dates><publisher><style face="normal" font="default">USDA Agricultural Research Service</style></publisher><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-t1152-heinemann.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>364</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Jamison,V.C.</style></author><author><style face="normal" font="default"> Thornton,J.F.</style></author></authors></contributors><titles><title><style face="normal" font="default">Water intake rates of a claypan soil from hydrograph analyses</style></title><secondary-title><style face="normal" font="default">Journal of Geophysical Research</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Journal of Geophysical Research</style></full-title></periodical><pages end="1860" start="1855">1855-1860</pages><volume><style face="normal" font="default">66</style></volume><number><style face="normal" font="default">6</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">RATES</style></keyword><keyword><style face="normal" font="default"> soil</style></keyword><keyword><style face="normal" font="default"> water</style></keyword></keywords><dates><year Day="0" Month="0" Year="1961">1961</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-t2244-jamison.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>363</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Larson,W.E.</style></author><author><style face="normal" font="default"> Lovely,W.G.</style></author><author><style face="normal" font="default"> Jamison,V.C.</style></author></authors></contributors><titles><title><style face="normal" font="default">Subsoiling doesn't pay in the Midwest</style></title><secondary-title><style face="normal" font="default">Iowa Farm Science</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Iowa Farm Science</style></full-title></periodical><pages end="6" start="5">5-6</pages><volume><style face="normal" font="default">15</style></volume><number><style face="normal" font="default">7</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">Iowa</style></keyword></keywords><dates><year Day="0" Month="0" Year="1961">1961</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-t3323-larson.pdf</url></pdf-urls></urls></record><record><database name="cswq_publications" path="c:\users\pruittm\documents\refmanager\cswq_publications">cswq_publications</database><source-app name="Reference Manager 11.0" version="11.0.0.359">Reference Manager 11.0</source-app><rec-number>362</rec-number><ref-type name="Journal">1</ref-type><contributors><authors><author><style face="normal" font="default">Thornton,J.F.</style></author></authors></contributors><titles><title><style face="normal" font="default">Moisture use by cotton in the Piedmont of Georgia</style></title><secondary-title><style face="normal" font="default">Transactions of the Asae</style></secondary-title></titles><periodical><full-title><style face="normal" font="System">Transactions of the Asae</style></full-title></periodical><pages end="44" start="37">37-44</pages><volume><style face="normal" font="default">4</style></volume><number><style face="normal" font="default">1</style></number><reprint-status status="no-file"/><keywords><keyword><style face="normal" font="default">MOISTURE</style></keyword><keyword><style face="normal" font="default"> cotton</style></keyword></keywords><dates><year Day="0" Month="0" Year="1961">1961</year></dates><urls><pdf-urls><url ppv-ref="no">http://www.ars.usda.gov/sp2UserFiles/Place/36221500/cswq-t690