Agroecosystems Management Research Unit : People & Places

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Dan B. Jaynes

Soil Scientist

Publications (Clicking on the reprint icon

will take you to the publication reprint.)

Storm water management: Potential for lower cost & more benefits if farmers & municipalities cooperate on tile drainage - (Review Article)

Kemper, D., Fouss, J.L., Jaynes, D.B., Dabney, S.M., Ihde, A., Meyer, D., Reicosky, D. 2013. Storm water management: Potential for lower cost & more benefits if farmers & municipalities cooperate on tile drainage. Journal of Soil and Water Conservation. 68(3):79A-83A.

An analytical solution to the one-dimensional heat conduction-convection equation in soil - (Peer Reviewed Journal) - (24-Jul-12)

The use of soil electrical conductivity to investigate soil homogeneity in Story County, Iowa, USA - (Peer Reviewed Journal)

Brevik, E., Fenton, T., Jaynes, D.B. 2012. The use of soil electrical conductivity to investigate soil homogeneity in Story County, Iowa, USA. Soil Horizons. 53:5. DOI:10.2136/sh12-04-0013.

Changes in yield and nitrate losses from using drainage water management in Central Iowa, USA - (Peer Reviewed Journal)

Jaynes, D.B. 2012. Changes in yield and nitrate losses from using drainage water management in Central Iowa, USA. Journal of Soil and Water Conservation. 67:485-494.

Development and adoption of measures to prevent off-site nutrient transfers - (Abstract Only)

Bryant, R.B., Kleinman, P.J., Jaynes, D.B., Feyereisen, G.W., Ippolito, J.A. 2012. Development and adoption of measures to prevent off-site nutrient transfers. Soil and Water Conservation Society Proceedings. p. 22-23.

Effectiveness of oat and rye cover crops in reducing nitrate losses in drainage water - (Peer Reviewed Journal)

Kaspar, T.C., Jaynes, D.B., Parkin, T.B., Moorman, T.B., Singer, J.W. 2012. Effectiveness of oat and rye cover crops in reducing nitrate losses in drainage water. Agricultural Water Management. 110:25-33. DOI:10.1016/j.agwat.2012.03.010.

Modeling the effects of controlled drainage, N rate and weather on nitrate loss to subsurface drainage - (Peer Reviewed Journal)

Fang, Q.X., Malone, R.W., Ma, L., Jaynes, D.B., Thorp, K.R., Green, T.R., Ahuja, L.R. 2012. Modeling the effects of controlled drainage, N rate and weather on nitrate loss to subsurface drainage. Agricultural Water Management. 103:150-161.

Effectiveness of oat and rye cover crops in reducing nitrate losses in drainage water - (Abstract Only)

Kaspar, T.C., Jaynes, D.B., Parkin, T.B., Moorman, T.B., Singer, J.W. 2011. Effectiveness of oat and rye cover crops in reducing nitrate losses in drainage water. American Society of Agronomy Annual Meetings [abstracts]. ASA-CSSA-SSSA Annual Meeting. Oct. 16-19, 2011, San Antonio, TX. CD-ROM.

Excess nitrogen in the U.S. environment: Trends, risks, and solutions

- (Peer Reviewed Journal)

Davidson, E.A., David, M.B., Galloway, J.N., Goodale, C., Haeuber, R., Harrison, J., Howarth, R.W., Jaynes, D.B., Lowrance, R.R., Nolan, T., Peel, J.L., Pinder, R.W., Porter, E., Snyder, C.S., Townsend, A.R., Ward, M.H. 2012. Excess nitrogen in the U.S. environment: Trends, risks, and solutions. Issues in Ecology. Available: http://www.esa.org/science_resources/issues/FileEnglish/issuesinecology15.pdf.

Cover crop effects on nitrogen load in tile drainage from Walnut Creek Iowa using root zone water quality model (RZWQM) - (Peer Reviewed Journal)

Singer, J.W., Malone, R.W., Jaynes, D.B., Ma, L. 2011. Cover crop effects on nitrogen load in tile drainage from Walnut Creek, Iowa, using root zone water quality model (RZWQM). Agricultural Water Management. 98(10):1622-1628.

Quality assurance of weather data for agricultural system model input - (Book / Chapter)

Malone, R.W., Meek, D.W., Ma, L., Jaynes, D.B., Nolan, B.T., Karlen, D.L. 2011. Quality assurance of weather data for agricultural system model input. In: Ahuja, L.R., Ma, L., editors. Methods of Introducing System Models into Agricultural Research. Madison, WI: American Society of Agronomy, Crop Science of America and Soil Science Society of America. p. 283-296.

Inverse modeling with RZWQM2 to predict water quality - (Book / Chapter)

Nolan, B.T., Malone, R.W., Ma, L., Green, C.T., Fienen, M.N., Jaynes, D.B. 2011. Inverse modeling with RZWQM2 to predict water quality. In: Ahuja, L.R., Ma, L., editors. Methods of Introducing System Models into Agricultural Research. Madison, WI: Agronomy Society of America, Crop Science Society of America, Soil Science Society of America Meeting. p. 327-363.

Economically optimal N rates of corn management zones delineated from soil and terrain attributes - (Peer Reviewed Journal)

Jaynes, D.B., Kaspar, T.C., Colvin, T. 2011. Economically optimal N rates of corn management zones delineated from soil and terrain attributes. Agronomy Journal. 103:1026-1035.

Drainage water management for reducing nitrate losses from tile drained fields - (Other)

Jaynes, D.B., Malone, R.W., Thorp, K.R. 2010. Drainage water management for reducing nitrate losses from tile drained fields. In: Rudebusch, L., (ed.) Getting into soil and water: 2010. Iowa Water Center, Ames, IA. p. 28-30.

Potential water quality impact of drainage water management in the Midwest USA - (Proceedings)

Jaynes, D.B., Thorp, K.R., James, D.E. 2010. Potential water quality impact of drainage water management in the Midwest USA. International Drainage Symposium. ASABE Paper No. IDS-CSBE100084.

Drainmod-simulated performance of drainage water management across the U.S. Midwest - (Proceedings)

Youssef, M.A., R. Wayne, S., Thorp, K.R., Ahmed, A.M., Jaynes, D.B. 2010. Drainmod-Simulated Performance of Drainage Water Management Across the U.S. Midwest. Proceedings of the 9th International Drainage Symposium. ASABE Paper No. IDS-CSBE100206..

Soil-test N recommendations augmented with PEST optimized RZWQM simulations - (Peer Reviewed Journal)

Malone, R.W., Jaynes, D.B., Ma, L., Nolan, B., Meek, D.W., Karlen, D.L. 2010. Soil-test N recommendations augmented with PEST optimized RZWQM simulations. Journal of Environmental Quality. 39:1711-1723.

Denitrifying Bioreactors – An Approach for Reducing Nitrate Loads to Receiving Waters - (Review Article)

Schipper, L.A., Robertson, W., Gold, A.J., Jaynes, D.B., Cameron, S.C. 2010. Denitrifying Bioreactors – An Approach for Reducing Nitrate Loads to Receiving Waters. Ecological Engineering. 36:1532-1543.

Confidence bands for measured economically optimal nitrogen rates - (Peer Reviewed Journal)

Jaynes, D.B. 2011. Confidence bands for measured economically optimal nitrogen rates. Precision Agriculture. 12(2):196-213.

Denitrification Activity, Wood Loss, and N2O Emissions Over 9 Years From a Wood Chip Bioreactor - (Peer Reviewed Journal)

Moorman, T.B., Parkin, T.B., Kaspar, T.C., Jaynes, D.B. 2010. Denitrification Activity, Wood Loss, and N2O Emissions Over 9 Years From a Wood Chip Bioreactor. Ecological Engineering. 36:1567-1574.

Crop Yield and Nitrate Losses from Sidedressing N at Canopy Closure - (Abstract Only)

Jaynes, D.B. 2009. Crop Yield and Nitrate Losses from Sidedressing N at Canopy Closure [abstract]. ASA-CSSA-SSSA Annual Meeting, Nov. 1-5, 2009l, Pittsburgh, PA.

RZWQM predicted effects of soil N testing with incorporated automatic parameter optimization software (PEST) and weather input quality control - (Abstract Only)

Malone, R.W., Jaynes, D.B., Ma, L., Nolan, B., Meek, D.W. 2009. RZWQM predicted effects of soil N testing with incorporated automatic parameter optimization software (PEST) and weather input quality control. American Society of Agronomy Annual Meetings [abstracts]. ASA-CSSA-SSSA Annual Meeting, Nov. 1-4, 2009, Pittsburgh, PA. CD-ROM.

Selecting the “Best” Yield Response Curve – How Much Does It Matter? - (Abstract Only)

Jaynes, D.B. 2009. Selecting the “Best” Yield Response Curve – How Much Does It Matter? [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Oct. 5-9, 2008, Houston, TX.

Denitrification in Wood Chip Bioreactors at Different Water Flows - (Peer Reviewed Journal)

Greenan, C., Moorman, T.B., Parkin, T.B., Kaspar, T.C., Jaynes, D.B. 2009. Denitrification in Wood Chip Bioreactors at Different Water Flows. Journal of Environmental Quality. 38:1664-1671.

Three Analysis Examples for Time Series Data - (Abstract Only)

Meek, D.W., Laird, D.A., Dinnes, D.L., Jaynes, D.B., Cambardella, C.A., Colvin, T.S., Hatfield, J.L., Karlen, D.L. 2008. Three Analysis Examples for Time Series Data [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Oct. 5-9, 2008, Houston, TX.

Nitrogen Fertilizer Effects on Soil Carbon Balances in Midwestern U.S. Agricultural Systems - (Peer Reviewed Journal)

Russell, A.E., Cambardella, C.A., Laird, D.A., Jaynes, D.B., Colvin, T.S., Meek, D.W. 2009. Nitrogen Fertilizer Effects on Soil Carbon Balances in Midwestern U.S. Agricultural Systems. Ecological Applications. 19(5):1102-1113.

Winter Cover Crop Effects on Nitrate Leaching in Subsurface Drainage as Simulated by RZWQM-DSSAT - (Peer Reviewed Journal)

Li, L., Malone, R.W., Ma, L., Kaspar, T.C., Jaynes, D.B., Saseendran, S.A., Thorp, K.R., Yu, Q., Ahuja, L.R. 2008. Winter Cover Crop Effects on Nitrate Leaching in Subsurface Drainage as Simulated by RZWQM-DSSAT. Transactions of the ASABE. 51:1575-1583.

DRAINMOD-N II: Evaluated for an agricultural system in Iowa and compared to RZWQM-DSSAT - (Peer Reviewed Journal)

Thorp, K.R., Youssef, M.A., Jaynes, D.B., Malone, R.W., Ma, L. 2009. DRAINMOD-N II: Evaluated for an agricultural system in Iowa and compared to RZWQM-DSSAT. Transactions of the ASABE. 52(5):1557-1573.

Agricultural Drainage Water Management in the Upper Mississippi River Basin: Potential Impact and Implementation Strategies - (Abstract Only)

Fausey, N.R., Pitts, D., Jaynes, D.B. 2008. Agricultural Drainage Water Management in the Upper Mississippi River Basin: Potential Impact and Implementation Strategies. Nonpoint Source Water Quality Monitoring Results Workshop. Meeting Abstract.

Potential Water Quality Impact of Drainage Water Management in the Midwest Cornbelt - (Abstract Only)

Jaynes, D.B., Thorp, K.R. 2008. Potential Water Quality Impact of Drainage Water Management in the Midwest Cornbelt [abstract]. American Society for Agricultural and Biological Engineers. Paper No. 08-4566.

Simulated Effects of Nitrogen Management and Soil Microbes on Soil Nitrogen Balance and Crop Production - (Peer Reviewed Journal)

Ma, L., Malone, R.W., Jaynes, D.B., Thorp, K.R., Ahuja, L.R. 2008. Simulated Effects of Nitrogen Management and Soil Microbes on Soil Nitrogen Balance and Crop Production. Soil Science Society of America Journal. 72:1594-1603.

SIMULATING LONG-TERM PERFORMANCE OF DRAINAGE WATER MANAGEMENT ACROSS THE MIDWESTERN UNITED STATES - (Peer Reviewed Journal)

Thorp, K.R., Jaynes, D.B., Malone, R.W. 2008. Simulating long-term performance of drainage water management across the midwestern United States. Transactions of the ASABE. 51(3):961-976.

Mapping Pesticide Partition Coefficients By Electromagnetic Induction - (Book / Chapter)

Jaynes, D.B. 2008. Mapping Pesticide Partition Coefficients By Electromagnetic Induction. In: Allred, B.J., Daniels, J.J., Ehsani, M.R., editors. Handbook of Agricultural Geophysics. Boca Raton, FL: CRC Press. p. 233-240.

The Extent of Cropland Drainage in the United States - (Abstract Only)

Jaynes, D.B., James, D.E. 2007. The Extent of Cropland Drainage in the United States [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Nov. 4-8, 2007, New Orleans, LA.

Using RZWQM-DSSAT to Stimulate Drainage Water Management Across the United States Corn Belt - (Abstract Only)

Thorp, K.R., Jaynes, D.B. 2007. Using RZWQM-DSSAT to Stimulate Drainage Water Management Across the United States Corn Belt [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Nov. 4-8, 2007, New Orleans, LA.

Simulated long-term nitrogen losses for a midwestern agricultural watershed in the United States - (Peer Reviewed Journal)

Gowda, P., Mulla, D.J., Jaynes, D.B. 2008. Simulated long-term nitrogen losses for a midwestern agricultural watershed in the United States. Agricultural Water Management. 95:616-624.

Potential Methods for Reducing Nitrate Losses in Artificially Drained Fields - (Peer Reviewed Journal)

Jaynes, D.B., Kaspar, T.C., Moorman, T.B., Parkin, T.B. 2008. Potential Methods for Reducing Nitrate Losses in Artificially Drained Fields. Journal of Environmental Quality. 37:429-436.

ECONOMIC AND ENVIRONMENTAL IMPACTS OF SELECTED BMP'S FOR NITRATE-NITROGEN REDUCTION IN WALNUT CREEK WATERSHED, IOWA, USING FEM (FARM ECONOMIC MODEL) AND ENHANCED SWAT (SOIL AND WATER ASSESSMENT TOOL) MODELS - (Peer Reviewed Journal)

Saleh, A., Osei, E., Jaynes, D.B., Du, B., Arnold, J.G. 2007. Economic and environmental impacts of selected BMP's for nitrate-nitrogen reduction in Walnut Creek Watershed, Iowa, using FEM (farm economic model) and enhanced SWAT (soil and water assessment tool) models. Transactions of the ASABE. 50(4):1251-1259.

Simulating long-term effects of nitrogen fertilizer application rates on corn yield and nitrogen dynamics - (Peer Reviewed Journal)

Thorp, K.R., Malone, R.W., Jaynes, D.B. 2007. Simulating long-term effects of nitrogen fertilizer application rates on corn yield and nitrogen dynamics. Transactions of the ASABE. 50(4):1287-1303.

Rye Cover Crop and Gamagrass Strip Effects on NO3 Concentration and Load in Tile Drainage - (Peer Reviewed Journal)

Kaspar, T.C., Jaynes, D.B., Parkin, T.B., Moorman, T.B. 2007. Rye Cover Crop and Gamagrass Strip Effects on NO3 Concentration and Load in Tile Drainage. Journal of Environmental Quality. 36(5):1503-1511.

Modeling Biochemical Impacts of Alternative Management Practices for a Row-Crop Field in Iowa - (Peer Reviewed Journal)

Farahbakhshazad, N., Dinnes, D.L., Li, C., Jaynes, D.B., Salas, W. 2008. Modeling Biochemical Impacts of Alternative Management Practices for a Row-Crop Field in Iowa. Agriculture, Ecosystems and Environment. 123(1-3):30-48.

Surface and Subsurface Solute Transport Properties at Row and Inter-Row Positions - (Peer Reviewed Journal)

Gaur, A., Jaynes, D.B., Horton, R., Ochsner, T.E. 2007. Surface and Subsurface Solute Transport Properties at Row and Inter-Row Positions. Soil Science. 172(6):419-431.

Understanding Nutrient Fate and Transport, Including the Importance of Hydrology in Determining Field Losses, and Potential Implications on Management Systems to Reduce Those Losses - (Proceedings)

Baker, J.L., David, M.B., Lemke, D.W., Jaynes, D.B. 2008. Understanding Nutrient Fate and Transport, Including the Importance of Hydrology in Determining Field Losses, and Potential Implications on Management Systems to Reduce Those Losses. In: Final Report: Gulf Hypoxia and Local Water Quality Concerns Workshop. p. 1-17.

In-Field Bioreactor for Removing Nitrate from Tile Drainage - (Abstract Only)

Jaynes, D.B., Kaspar, T.C., Moorman, T.B., Parkin, T.B. 2006. In-Field Bioreactor for Removing Nitrate from Tile Drainage [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Nov. 12-16, 2006, Indianapolis, IN.

Using RZWQM and Drainmod NII to Simulate Drainage Water Management in Iowa - (Abstract Only)

Thorp, K.R., Jaynes, D.B., Malone, R.W. 2006. Using RZWQM and Drainmod NII to Simulate Drainage Water Management in Iowa [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Nov. 12-16, 2006, Indianapolis, IN.

Field Measurement of Soil Surface Chemical Transport Properties for Comparison of Management Zones - (Peer Reviewed Journal)

Heitman, J.L., Gaur, A., Horton, R., Jaynes, D.B., Kaspar, T.C. 2007. Field Measurement of Soil Surface Chemical Transport Properties for Comparison of Management Zones. Soil Science Society of America Journal. 71(2):529-536.

Response to "Comments on 'Need for a Soil-based Approach in managing Nitrogen Fertilizers for Profitable Corn Production' and 'Soil Organic Nitrogen Enrichment Following Soybean in an Iowa Corn-Soybean Rotation'" - (Other)

Jaynes, D.B., Olk, D.C., Colvin, T., Kaspar, T.C., Karlen, D.L. 2007. Response to "Comments on 'Need for a Soil-based Approach in managing Nitrogen Fertilizers for Profitable Corn Production' and 'Soil Organic Nitrogen Enrichment Following Soybean in an Iowa Corn-Soybean Rotation'". Soil Science Society of America Journal. 71(1):255.

Drainage Water Management for the Midwest - (Experiment Station)

Frankenberger, J., Kladivko, E., Sands, G., Jaynes, D.B., Fausey, N.R., Helmers, M., Cooke, R., Strock, J., Nelson, K., Brown, L. Drainage Water Management for the Midwest. Purdue Extension, Knowledge to Go. WQ-44. p. 1-8.

RZWQM Simulated Effects Of Crop Rotation, Tillage, And Controlled Drainage On Crop Yield And Nitrate-N Loss In Drain Flow.

- (Peer Reviewed Journal)

Ma, L., Malone, R.W., Heilman, P., Jaynes, D.B., Ahuja, L.R., Saseendran, S.A., Kanwar, R.S., Ascough II, J.C. 2007. RZWQM simulated effects of crop rotation, tillage, and controlled drainage on crop yield and nitrate-n loss in drain flow. Geoderma 140(3):260-271. doi:10/1016/j/geoderma.2007.04.010.

CORN YIELD AND NITRATE LOSS IN SUBSURFACE DRAINAGE FROM MID-SEASON N FERTILIZER APPLICATION - (Peer Reviewed Journal)

Jaynes, D.B., Colvin, T.S. 2006. Corn yield and nitrate loss in subsurface drainage from mid-season N fertilizer application. Agronomy Journal. 98:1479-1487.

EVALUATION OF SWAT IN SIMULATING NITRATE NITROGEN AND ATRAZINE FATES IN A WATERSHED WITH TILES AND POTHOLES - (Peer Reviewed Journal)

Du, B., Saleh, A., Jaynes, D.B., Arnold, J.G. 2006. Evaluation of SWAT in Simulating Nitrate Nitrogen and Atrazine Fates in a Watershed with Tiles and Potholes. Transactions of the ASABE. 49(4):949-959.

APPLICATION OF THE ANNAGNPS MODEL TO THE WALNUT CREEK, IA CEAP BENCHMARK WATERSHED

- (Abstract Only)

Dinnes, D.L., Jaynes, D.B., Karlen, D.L., Bingner, R.L., Yuan, Y. 2006. Application of the ANNAGNPS model to the Walnut Creek, IA CEAP benchmark watershed. 2006 USDA-ARS CEAP Watershed Assessment Study Annual Meeting. Available: www.nrcs.usda.gov/TECHNICAL/nri/ceap/watersheds/2006meeting.html.

QUANTIFYING PORE SIZE SPECTRUM OF MACROPORE-TYPE PREFERENTIAL PATHWAYS UNDER TRANSIENT FLOW - (Peer Reviewed Journal)

Kung, K., Kladivko, E., Helling, C.S., Gish, T.J., Steenhuis, T.S., Jaynes, D.B. 2006. Quantifying pore size spectrum of macropore-type preferential pathways under transient flow. Vadose Zone Journal. 5:978-989.

MEASURED AND PREDICTED SOLUTE TRANSPORT IN A TILE DRAINED FIELD - (Peer Reviewed Journal)

Gaur, A., Horton, R., Jaynes, D.B., Baker, J.L. 2006. Measured and predicted solute transport in a tile drained field. Soil Science Society of America Journal. 70:872-881.

EXAMINING CHANGES IN SOIL ORGANIC CARBON WITH OAT AND RYE COVER CROPS USING TERRAIN COVARIATES - (Peer Reviewed Journal)

Kaspar, T.C., Parkin, T.B., Jaynes, D.B., Cambardella, C.A., Meek, D.W., Jung, Y.S. 2006. Examining changes in soil organic carbon with oat and rye cover crops using terrain covariates. Soil Science Society of America Journal. 70:1168-1177.

Nitrate Loss in Subsurface Drainage from Mid-Season N Fertilizer Application - (Abstract Only)

Jaynes, D.B., Colvin, T.S. 2005. Nitrate Loss in Subsurface Drainage from Mid-Season N Fertilizer Application [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Nov. 6-10, 2005, Salt Lake City, UT.

TRANSLATING AGRICULTURAL WATER QUALITY RESEARCH RESULTS INTO A FORMAT FOR POLICYMAKERS TO USE - (Abstract Only)

Dinnes, D.L., Jaynes, D.B., Hatfield, J.L. 2005. Translating agricultural water quality research results into a format for policymakers to use [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Nov. 6-10, 2005, Salt Lake City, UT.

EFFECTS OF A RYE COVER CROP AND A PERMANENT GAMAGRASS STRIP ON NITRATE LOAD IN TILE DRAINAGE - (Abstract Only)

Kaspar, T.C., Jaynes, D.B., Parkin, T.B., Moorman, T.B. 2005. Effects of a rye cover crop and a permanent gamagrass strip on nitrate load in tile drainage [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts. Nov. 6-10, 2005, Salt Lake City, UT.

MODELING PRECISION AGRICULTURE FOR BETTER CROP PRODUCTIVITY AND ENVIRONMENTAL QUALITY - (Peer Reviewed Journal)

Bakhsh, A., Kanwar, R., Jaynes, D.B., Colvin, T.S., Ahuja, L.R. 2005. Modeling precision agriculture for better crop productivity and environmental quality. Asian Association for Agricultural Engineering. 14(4):235-243.

COMPARING CARBON SUBSTRATES FOR DENITRIFICATION OF SUBSURFACE DRAINAGE WATER - (Peer Reviewed Journal)

Greenan, C.M., Moorman, T.B., Kaspar, T.C., Parkin, T.B., Jaynes, D.B. 2006. Comparing carbon substrates for denitrification of subsurface drainage water. Journal of Environmental Quality. 35:824-829.

SUSTAINING SOIL RESOURCES WHILE MANAGING NUTRIENTS - (Proceedings)

Jaynes, D.B., Karlen, D.L. 2005. Sustaining soil resources while managing nutrients. In: Final Report: Gulf Hypoxia and Local Water Quality Concerns Workshop, September 26-28, 2005, Ames, Iowa. p. 149-158.

IDENTIFYING SPATIAL PATTERNS OF EROSION FOR USE IN PRECISION CONSERVATION - (Peer Reviewed Journal)

Schumacher, J.A., Venteris, E.R., Mccarty, G.W., Ritchie, J.C., Kaspar, T.C., Colvin, T.S., Jaynes, D.B., Karlen, D.L., Fenton, T.E., Schumacher, T.E., Lindstrom, M.J. 2005. Identifying spatial patterns of erosion for use in precision conservation. Journal of Soil and Water Conservation. 60(6):355-362.

Nitrate Losses in Tile Drainage from Mid-Season N-Fertilizer - (Abstract Only)

Jaynes, D.B., Colvin, T.S. 2005. Nitrate Losses in Tile Drainage from Mid-Season N-Fertilizer [abstract]. American Society of Agricultural Engineers. Paper No. 052028.

SOIL AMINO ACID ENRICHMENT FOLLOWING SOYBEAN IN AN IOWA CORN-SOYBEAN ROTATION 1753 - (Peer Reviewed Journal)

Martens, D.A., Jaynes, D.B., Colvin, T.S., Kaspar, T.C., Karlen, D.L. 2006. Soil amino acid enrichment following soybean in an Iowa corn-soybean rotation. Soil Science Society of America Journal. 70:382-392.

MODELING NITRATE LEACHING WITH A BIOGEOCHEMICAL MODEL MODIFIED BASED ON OBSERVATIONS IN A ROW-CROP FIELD IN IOWA - (Peer Reviewed Journal)

Li, C., Farahbakhshazad, N., Jaynes, D.B., Dinnes, D.L., Salas, W., Mclaughlin, D. 2006. Modeling nitrate leaching with a biogeochemical model modified based on observations in a row-crop field in Iowa. Ecological Modeling. 196:116-130.

EVALUATION OF SWAT IN SIMULATING ATRAZINE LOSSES IN STREAM DISCHARGE FOR WALNUT CREEK WATERSHED (IOWA) - (Abstract Only)

Du, B., Saleh, A., Jaynes, D.B., Arnold, J.G. 2005. Evaluation of SWAT in simulating atrazine losses in stream discharge for Walnut Creek watershed (Iowa) [CD-ROM]. Watershed Management Conference Proceedings. Atlanta, Georgia.

EFFECT OF THE ACCURACY OF SPATIAL RAINFALL INFORMATION ON THE MODELING OF WATER, SEDIMENT, AND NO3-N LOADS AT THE WATERSHED LEVEL - (Peer Reviewed Journal)

Chaplot, V., Saleh, A., Jaynes, D.B. 2005. No-till corn response to banded K on Des Moines lobe soils. Journal of Hydrology. 312(1-4):223-234.

CORN RESPONSE TO LATE-SPRING NITROGEN MANAGEMENT IN THE WALNUT CREEK WATERSHED - (Peer Reviewed Journal)

Karlen, D.L., Dinnes, D.L., Jaynes, D.B., Hurburgh, C.R., Cambardella, C.A., Colvin, T.S., Rippke, G.R. 2005. Corn response to late-spring nitrogen management in the Walnut Creek watershed. Agronomy Journal. 97:1054-1061.

QUANTIFYING PORE SIZE SPECTRUM OF MACROPORE-TYPE PREFERENTIAL PATHWAYS - (Peer Reviewed Journal)

Kung, K.S., Hanke, M., Helling, C.S., Kladivko, E.J., Gish, T.J., Steenhuis, T.S., Jaynes, D.B. 2005. Quantifying pore size spectrum of macropore-type preferential pathways. Soil Science Society of America Journal, 69:1196-1208.

A DRIPPER-TDR METHOD FOR INSITU DETERMINATION OF HYDRAULIC CONDUCTIVITY AND CHEMICAL TRANSPORT PROPERTIES OF SURFACE SOILS - (Peer Reviewed Journal)

Al-Jabri, S.A., Lee, J., Gaur, A., Horton, R., Jaynes, D.B. 2006. A dripper-TDR method for insitu determination of hydraulic conductivity and chemical transport properties of surface soils. Advances in Water Resources. 29(2):239-249.

THE EFFECTS OF N-FERTILIZER PRACTICES ON THE WATER QUALITY OF WALNUT CREEK, IOWA - (Abstract Only)

Jaynes, D.B., Dinnes, D.L., Hatfield, J.L., Saleh, A., Arnold, J.G. 2004. The Effects of N-Fertilizer Practices on the Water Quality of Walnut Creek, Iowa [CD-ROM]. ASA-CSSA-SSSA Annual Meeting Abstracts. Madison, Wisconsin.

SOIL, WHEAT, AND SORGHUM RESPONSE TO TILLAGE UNDER RHIZOTRON CONDITIONS - (Abstract Only)

Karlen, D.L., Jaynes, D.B., Pellack, L.S., Heikens, K.E. 2004. Soil, Wheat, and Sorghum Response to Tillage Under Rhizotron Conditions [CD-ROM]. ASA-CSSA-SSSA Annual Meeting Abstracts. Madison, Wisconsin.

SOIL SURFACE HYDRAULIC AND CHEMICAL TRANSPORT PROPERTIES - (Abstract Only)

Gaur, A., Heitman, J., Horton, R., Jaynes, D.B. 2004. Soil Surface Hydraulic and Chemical Transport Properties [CD-ROM]. ASA-CSSA-SSSA Annual Meeting Abstracts. Madison, Wisconsin.

IDENTIFYING SPATIAL PATTERNS OF EROSION FOR USE IN PRECISION CONSERVATION - (Abstract Only)

Schumacher, J.A., Venteris, E.R., Mccarty, G.W., Ritchie, J.C., Kaspar, T.C., Colvin, T.S., Jaynes, D.B., Karlen, D.L., Fenton, T.E., Schumacher, T.E., Lindstrom, M.J. 2004. Identifying Spatial Patterns of Erosion for Use in Precision Conservation [CD-ROM]. ASA-CSSA-SSSA Annual Meeting Abstracts. Madison, Wisconsin. p. 4780.

DEVELOPMENT OF NITROGEN RESPONSE CURVES USING FIELD SCALE DATA AND DATA MINING - (Abstract Only)

Chaudhary, A., Colvin, T.S., Jaynes, D.B., Kaspar, T.C. 2004. Development of nitrogen response curves using field scale data and data mining. International Conference on Precision Agriculture Abstracts & Proceedings. [CD-ROM]. Madison, WI.

NITRATE LEACHING TO SUBSURFACE DRAINS AS AFFECTED BY DRAIN SPACING AND CHANGES IN CROP PRODUCTION SYSTEM - (Peer Reviewed Journal)

Kladivko, E.J., Frankenberger, J.R., Jaynes, D.B., Meek, D.W., Jenkinson, B.J., Fausey, N.R. 2004. Nitrate Leaching to Subsurface Drains as Affected by Drain Spacing and Changes in Crop Production System. Journal of Environmental Quality. 33(5):1803-1813.

POTENTIAL METHODS FOR REDUCING NITRATE LOSSES IN ARTIFICIALLY DRAINED FIELDS - (Proceedings)

Jaynes, D.B., Kaspar, T.C., Moorman, T.B., Parkin, T.B. 2004. Potential methods for reducing nitrate losses in artificially drained fields. International Drainage Symposium. VIII:p. 59-69.

BEYOND FERTILIZER MANAGEMENT: IN-FIELD APPROACHES FOR REDUCING NITRATE LOADS COMING FROM AGRICULTURAL DRAINAGE TILES - (Abstract Only)

Kaspar, T.C., Jaynes, D.B., Parkin, T.B., Moorman, T.B. 2004. Beyond fertilizer management: in-field approaches for reducing nitrate loads coming from agricultural drainage tiles [abstract]. Final Program Book of Abstracts, The Ninth Biennial Conference Minnesota Water 2004: Policy and Planning to Ensure Minnesota's Water Supplies. Minneapolis, MN. p. 70.

RELATIONSHIP OF CORN AND SOYBEAN YIELD TO SOIL AND TERRAIN PROPERTIES - (Peer Reviewed Journal)

Kaspar, T.C., Pulido, D.J., Fenton, T.E., Colvin, T.S., Karlen, D.L., Jaynes, D.B., Meek, D.W. 2004. Relationship of corn and soybean yield to soil and terrain properties. Agronomy Journal. 96(3):700-709.

PREDICTING WATER, SEDIMENT AND NO3-N LOADS UNDER SCENARIOS OF LAND-USE AND MANAGEMENT PRACTICES IN A FLAT WATERSHED - (Peer Reviewed Journal)

Chaplot, V., Saleh, A., Jaynes, D.B., Arnold, J.G. 2004. Predicting water, sediment and NO3-N loads under scenarios of land-use and management practices in a flat watershed. Journal of Water Air and Soil Pollution. 154(1-4):271-293.

IDENTIFYING POTENTIAL SOYBEAN MANAGEMENT ZONES FROM MULTI-YEAR YIELD DATA - (Peer Reviewed Journal)

Jaynes, D.B., Kaspar, T.C., Colvin, T.S., 2005. Identifying potential soybean management zones from multi-year yield data. Computers in Agriculture. 46(1-3):309-327.

EVALUATION OF SWAT ON MODELING NITRATE-NITROGEN IN SOIL PROFILE AND STREAM DISCHARGE FOR WALNUT CREEK WATERSHED WITH TILE AND POTHOLE - (Proceedings)

BING, D., SALEH, A., ARNOLD, J.G., JAYNES, D.B. EVALUATION OF SWAT ON MODELING NITRATE-NITROGEN IN SOIL PROFILE AND STREAM DISCHARGE FOR WALNUT CREEK WATERSHED WITH TILE AND POTHOLE. WATER MANAGEMENT TO MEET EMERGING TMDL ENVIRONMENTAL REGULATIONS CONFERENCE. 2003. CD-ROM. ST. JOSEPH, MI. AMERICAN SOCIETY OF AGRICULTURAL ENGINEERS.

APPLICATION OF SOIL AND WATER ASSESSMENT TOOL (SWAT) TO LANDSCAPES WITH TILES AND POTHOLES. PART II. VALIDATION OF NEW PROCEDURES. CASE OF WALNUT CREEK WATERSHED (IOWA) - (Proceedings)

BING, D., SALEH, A., ARNOLD, J.G., JAYNES, D.B. 2003. APPLICATION OF SOIL AND WATER ASSESSMENT TOOL (SWAT) TO LANDSCAPES WITH TILES AND POTHOLES. PART II. VALIDATION OF NEW PROCEDURES. CASE OF WALNUT CREEK WATERSHED (IOWA). ASAE ANNUAL INTERNATIONAL MEETING. AMERICAN SOCIETY OF AGRICULTURAL ENGINEERS. PAPER NO. 032164.

STATE-SPACE ANALYSIS OF THERMAL DIFFUSIVITY DURING WATER PERCOLATION IN A FIELD SOIL - (Abstract Only)

JAYNES, D.B., WENDROTH, O., NIELSEN, D.R. STATE-SPACE ANALYSIS OF THERMAL DIFFUSIVITY DURING WATER PERCOLATION IN A FIELD SOIL. ASA-CSSA-SSSA ANNUAL MEETING ABSTRACTS. 2003. CD-ROM. MADISON, WI.

CORN SOYBEAN YIELD ZONES FROM CLUSTER ANALYSIS OF MULTI-YEAR YIELD DATA - (Abstract Only)

JAYNES, D.B., KASPAR, T.C., COLVIN, T.S. CORN SOYBEAN YIELD ZONES FROM CLUSTER ANALYSIS OF MULTI-YEAR YIELD DATA. ASA-CSSA-SSSA ANNUAL MEETING ABSTRACTS. 2003. CD-ROM. MADISON, WI.

SURFACE SOLUTE TRANSPORT PROPERTIES AND SUBSURFACE CHEMICAL LEACHING IN A TILE DRAINED FIELD - (Abstract Only)

GAUR, A., HORTON, R., JAYNES, D.B. SURFACE SOLUTE TRANSPORT PROPERTIES AND SUBSURFACE CHEMICAL LEACHING IN A TILE DRAINED FIELD. ASA-CSSA-SSSA ANNUAL MEETING ABSTRACTS. 2003. CD-ROM. MADISON, WI.

STIMULATION OF DENITRIFICATION AND NITRATE REMOVAL FROM SUBSURFACE DRAINAGE WATER - (Abstract Only)

MOORMAN, T.B., PARKIN, T.B., JAYNES, D.B., KASPAR, T.C. STIMULATION OF DENITRIFICATION AND NITRATE REMOVAL FROM SUBSURFACE DRAINAGE WATER. ASA-CSSA-SSSA ANNUAL MEETING ABSTRACTS. 2003. CD-ROM. MADISON, WI.

CHANGES IN SOIL CARBON RESPONSE TO YEAR, PREVIOUS CROP, AND COVER CROP - (Abstract Only)

KASPAR, T.C., PARKIN, T.B., JAYNES, D.B. CHANGES IN SOIL CARBON RESPONSE TO YEAR, PREVIOUS CROP, AND COVER CROP. ASA-CSSA-SSSA ANNUAL MEETING ABSTRACTS. 2003. CD-ROM. MADISON, WI.

NUTRIENT AND HERBICIDE MOVEMENT IN STREAMFLOW FROM TWO MIDWESTERN WATERSHEDS - (Proceedings)

ALBERTS, E.E., JAYNES, D.B., LERCH, R.N. NUTRIENT AND HERBICIDE MOVEMENT IN STREAMFLOW FROM TWO MIDWESTERN WATERSHEDS. PROCEEDINGS OF FIRST INTERAGENCY CONFERENCE ON RESEARCH IN THE WATERSHEDS. 2003. UNITED STATES DEPARTMENT OF AGRICULTURE. AGRICULTURAL RESEARCH SERVICE. WASHINGTON, D.C. P. 385-390 CDROM.

EVALUATION OF THE ACCURACY OF A CENTRAL IOWA SOIL SURVEY AND IMPLICATIONS FOR PRECISION SOIL MANAGEMENT - (Peer Reviewed Journal)

BREVIK, E.C., FENTON, T.E., JAYNES, D.B. EVALUATION OF THE ACCURACY OF A CENTRAL IOWA SOIL SURVEY AND IMPLICATIONS FOR PRECISION SOIL MANAGEMENT. PRECISION AGRICULTURE. 2003. V. 4(3). P. 331-342.

USING THE LATE SPRING NITRATE TEST TO REDUCE NITRATE LOSS WITHIN A WATERSHED - (Peer Reviewed Journal)

JAYNES, D.B., DINNES, D.L., MEEK, D.W., KARLEN, D.L., CAMBARDELLA, C.A., COLVIN, T.S. USING THE LATE SPRING NITRATE TEST TO REDUCE NITRATE LOSS WITHIN A WATERSHED. JOURNAL OF ENVIRONMENTAL QUALITY. 2004. V. 33(2). P. 656-668.

DENITRIFICATION-BASED REMOVAL OF NITRATE FROM SUBSURFACE DRAINAGE WATER - (Abstract Only) - (14-May-03)

USING SURFACE TIME DOMAIN REFLECTOMETRY MEASUREMENTS TO ESTIMATE SUBSURFACE CHEMICAL MOVEMENT - (Peer Reviewed Journal)

GAUR, A., HORTON, R., JAYNES, D.B., JACOBSON, L., AL-JABRI, S.A. USING SURFACE TIME DOMAIN REFLECTOMETRY MEASUREMENTS TO ESTIMATE SUBSURFACE CHEMICAL MOVEMENT. VADOSE ZONE JOURNAL. 2003. V. 2. P. 539-543.

EVALUATION OF NITRATE-N FLUXES FROM A TILE-DRAINED WATERSHED - (Proceedings)

TOMER, M.D., MEEK, D.W., JAYNES, D.B., HATFIELD, J.L. EVALUATION OF NITRATE-N FLUXES FROM A TILE-DRAINED WATERSHED. PROCEEDINGS OF THE TMDL SCIENCE ISSUES CONFERENCE. 2002. CD-ROM. Alexandria, VA.

CORN RESPONSE TO NITROGEN ACROSS LANDSCAPE POSITIONS - (Abstract Only)

KASPAR, T.C., COLVIN, T.S., JAYNES, D.B., KARLEN, D.L. CORN RESPONSE TO NITROGEN ACROSS LANDSCAPE POSITIONS. ASA-CSSA-SSSA ANNUAL MEETING ABSTRACTS. 2002. CD-ROM. MADISON, WI.

USE OF NEAR-SURFACE TDR MEASUREMENTS TO PREDICT SUBSURFACE SOLUTE TRANSPORT - (Abstract Only)

GAUR, A., HORTON, R., JAYNES, D.B. USE OF NEAR-SURFACE TDR MEASUREMENTS TO PREDICT SUBSURFACE SOLUTE TRANSPORT. SOIL SCIENCE SOCIETY OF AMERICA ANNUAL MEETING. 2002. CD-ROM. MADISON, WI.

EVALUATION OF NITRATE-N FLUXES FROM A TILE-DRAINED WATERSHED IN CENTRAL IOWA - (Other)

Tomer, M.D., Meek, D.W., Jaynes, D.B., Hatfield, J.L. 2003. Evaluation of nitrate-n fluxes from a tile-drained watershed in central Iowa. Journal of Environmental Quality. Poster No. 19.

EVALUATION OF NITRATE-N FLUXES FROM A TILE-DRAINED WATERSHED IN CENTRAL IOWA - (Peer Reviewed Journal)

TOMER, M.D., MEEK, D.W., JAYNES, D.B., HATFIELD, J.L. EVALUATION OF NITRATE-N FLUXES FROM A TILE-DRAINED WATERSHED IN CENTRAL IOWA. JOURNAL OF ENVIRONMENTAL QUALITY. 2003. V. 32. P. 642-653.

NITROGEN FERTILIZER EFFECTS ON SOIL ORGANIC CARBON DYNAMICS IN CORN-SOYBEAN AGROECOSYSTEMS - (Abstract Only)

RUSSELL, A.E., CAMBARDELLA, C.A., LAIRD, D.A., JAYNES, D.B., COLVIN, T.S., MEEK, D.W. NITROGEN FERTILIZER EFFECTS ON SOIL ORGANIC CARBON DYNAMICS IN CORN-SOYBEAN AGROECOSYSTEMS. ECOLOGICAL SOCIETY OF AMERICA PROCEEDINGS. 2002. AVAILABLE FROM: www:esa.org/publications.

SUBSURFACE DRAINAGE MODIFICATIONS TO REDUCE NITRATE LOSSES IN DRAINAGE - (Proceedings)

JAYNES, D.B., KASPAR, T.C., MOORMAN, T.B., PARKIN, T.B. SUBSURFACE DRAINAGE MODIFICATIONS TO REDUCE NITRATE LOSSES IN DRAINAGE. ASAE ANNUAL INTERNATIONAL MEETING. 2002. PAPER NO. 02-2015.

MODELING LONG-TERM NITROGEN LOSSES IN WALNUT CREEK WATERSHED, IOWA - (Proceedings)

GOWDA, P.H., MULLA, D.J., JAYNES, D.B. MODELING LONG-TERM NITROGEN LOSSES IN WALNUT CREEK WATERSHED, IOWA. ASAE ANNUAL INTERNATIONAL MEETING. 2002. PAPER NO. 02-2134.

COMPARISON OF TECHNIQUES FOR DEFINING YIELD POTENTIAL ZONES IN AN IOWA FIELD - (Proceedings)

JAYNES, D.B., KASPAR, T.C., COLVIN, T.S. COMPARISON OF TECHNIQUES FOR DEFINING YIELD POTENTIAL ZONES IN AN IOWA FIELD. INTERNATIONAL CONFERENCE ON PRECISION AGRICULTURE ABSTRACTS & PROCEEDINGS. 2002. CD-ROM. MADISON, WI: ASA-CSSA-SSA.

CHARACTERIZATION OF WATER AND NITRATE FLUXES FROM A TILE-DRAINED WATERSHED - (Abstract Only)

TOMER, M.D., JAYNES, D.B., HATFIELD, J.L., COLE, K.J., DINNES, D.L., JAQUIS, R.J. CHARACTERIZATION OF WATER AND NITRATE FLUXES FROM A TILE-DRAINED WATERSHED. SOIL AND WATER CONSERVATION SOCIETY. 2002. V. 57(5). P. 325.

SURFACE WATER QUALITY RESPONSE TO A NITROGEN FERTILIZER BMP AT THE WATERSHED SCALE - (Abstract Only)

DINNES, D.L., JAYNES, D.B., KARLEN, D.L., MEEK, D.W., CAMBARDELLA, C.A., COLVIN, T.S., HATFIELD, J.L. SURFACE WATER QUALITY RESPONSE TO A NITROGEN FERTILIZER BMP AT THE WATERSHED SCALE. SOIL AND WATER CONSERVATION SOCIETY. 2002. V. 57(5). P. 308.

A SITE-SPECIFIC EVALUATION OF A CROP-DENITRIFICATION/DECOMPOSITION MODEL BASED UPON A US MIDWESTERN ROW-CROP FIELD - (Proceedings)

FARAHBAKHSHAZAD, N., MCLAUGHLIN, D., DINNES, D.L., JAYNES, D.B., LI, C. A SITE-SPECIFIC EVALUATION OF A CROP-DENITRIFICATION/DECOMPOSITION MODEL BASED UPON A US MIDWESTERN ROW-CROP FIELD. INTERNATIONAL CONFERENCE ON PRECISION AGRICULTURE ABSTRACTS & PROCEEDINGS. 2002. CD-ROM. Madison, WI: ASA-CSSA-SSSA.

RELATIONSHIP BETWEEN SIX YEARS OF CORN YIELDS AND TERRAIN ATTRIBUTES - (Peer Reviewed Journal)

KASPAR, T.C., COLVIN, T.S., JAYNES, D.B., KARLEN, D.L., JAMES, D.E., MEEK, D.W., PULIDO, D., BUTLER, H. RELATIONSHIP BETWEEN SIX YEARS OF CORN YIELDS AND TERRAIN ATTRIBUTES. PRECISION AGRICULTURE. 2003. V. 4. P. 87-101.

FIELD DETERMINATION OF SOIL HYDRAULIC AND CHEMICAL TRANSPORT PROPERTIES - (Peer Reviewed Journal)

AL-JABRI, S.A., HORTON, R., JAYNES, D.B., GAUR, A. FIELD DETERMINATION OF SOIL HYDRAULIC AND CHEMICAL TRANSPORT PROPERTIES. SOIL SCIENCE. 2002. V. 167(2). P. 353-367.

6.5 SOLUTE TRANSPORT: DATA ANALYSIS AND PARAMETER ESTIMATION - (Book / Chapter)

Skaggs, T.H., Jaynes, D.B., Kachanoski, R.G., Shouse, P.J., Ward, A.L. 2002. 6.5 solute transport: data analysis and parameter estimation. In. J.H. Dane and G.C. Topp. (eds). Methods of Soil Analysis. Part 4 Physical Methods. Soil Science of America, Madison, WI. Chapter 6.5. p. 1403-1434.

CLUSTER ANALYSIS OF SPATIOTEMPORAL CORN YIELD PATTERNS IN AN IOWA FIELD - (Peer Reviewed Journal)

JAYNES,D.B., KASPAR,T.C., COLVIN,T.S., JAMES,D.E., CLUSTER ANALYSIS OF SPATIOTEMPORAL CORN YIELD PATTERNS IN AN IOWA FIELD, AGRONOMY JOURNAL, 2003. v. 95. p. 574-586.

PAIRED WATERSHED MODELING OF SPATIALLY VARIABLE NITRATE LOSSES IN WALNUT CREEK, IA - (Abstract Only)

GOWDA, P., MULLA, D., JAYNES, D.B. PAIRED WATERSHED MODELING OF SPATIALLY VARIABLE NITRATE LOSSES IN WALNUT CREEK, IA. AGRONOMY ABSTRACTS. 2001. CD-ROM. MADISON, WI. ASA-CSSA-SSSA.

FLOW-DURATION CHARACTERIZATION OF WATER AND NITRATE FLUXES FROM A TILE-DRAINED WATERSHED - (Abstract Only)

TOMER, M.D., BURKART, M.R., JAYNES, D.B., JAQUIS, R.J., COLE, K.J., HATFIELD, J.L., DINNES, D.L. FLOW-DURATION CHARACTERIZATION OF WATER AND NITRATE FLUXES FROM A TILE-DRAINED WATERSHED. AMERICAN SOCIETY OF AGRONOMY MEETINGS. 2001. CD-ROM. MADISON, WI.

FIELD DETERMINATION OF SOIL HYDRAULIC AND SOLUTE TRANSPORT PROPERTIES - (Abstract Only)

LEE, J., AL-JABRI, A., HORTON, R., JAYNES, D.B. FIELD DETERMINATION OF SOIL HYDRAULIC AND SOLUTE TRANSPORT PROPERTIES. AMERICAN SOCIETY OF AGRONOMY MEETINGS. 2001. CD-ROM. MADISON, WI.

FIELD DETERMINATION OF SOIL HYDRAULIC AND SOLUTE TRANSPORT PROPERTIES - (Abstract Only)

LEE, J., AL-JABRI, A., HORTON, R., JAYNES, D.B. FIELD DETERMINATION OF SOIL HYDRAULIC AND SOLUTE TRANSPORT PROPERTIES. AGRONOMY ABSTRACTS. 2001. CD-ROM. MADISON, WI. ASA-CSSA-SSSA.

A POINT SOURCE METHOD FOR RAPID ESTIMATION OF SOIL HYDRAULIC AND CHEMICAL TRANSPORT PROPERTIES - (Peer Reviewed Journal)

Al-Jabri, A., Horton, R., Jaynes, D.B. 2002. A point source method for rapid estimation of soil hydraulic and chemical transport properties. Soil Science Society of America Journal. 66:12-18.

SOIL WATER HYSTERESIS - (Book / Chapter)

JAYNES, D.B. SOIL WATER HYSTERESIS. ENCYCLOPEDIA OF WATER SCIENCE. 2003. P.882-884.

NITROGEN MANAGEMENT STRATEGIES TO REDUCE NITRATE LEACHING IN TILE-DRAINED MIDWESTERN SOILS - (Review Article)

DINNES, D.L., KARLEN, D.L., JAYNES, D.B., KASPAR, T.C., HATFIELD, J.L., COLVIN, T.S., CAMBARDELLA, C.A. NITROGEN MANAGEMENT STRATEGIES TO REDUCE NITRATE LEACHING IN TILE-DRAINED MIDWESTERN SOILS. AGRONOMY JOURNAL. 2002. V. 94. P. 153-171.

TEMPORAL DYNAMICS OF PREFERENTIAL FLOW TO A SUBSURFACE DRAIN - (Peer Reviewed Journal)

Jaynes, D.B., Ahmed, S.I., Kanwar, R.S., Kung, K.J. 2001. Temporal dynamics of preferential flow to a subsurface drain. Soil Science Society of America Journal. 65:1368-1376.

CHARACTERIZATION OF PREFERENTIAL FLOW IN UNDISTURBED, STRUCTURED SOIL COLUMNS USING A VERTICAL TDR PROBE - (Peer Reviewed Journal)

Lee, J., Noborio, K., Horton, R., Jaynes, D.B. 2004. Characterization of preferential flow in undisturbed, structured soil columns using a vertical TDR probe. Journal of Contaminant Hydrology. 51(3-4)131-144.

NITRATE LOSS IN SUBSURFACE DRAINAGE AS AFFECTED BY N-FERTILIZER RATE - (Peer Reviewed Journal)

Jaynes, D.B., Colvin, T.S., Karlen, D.L., Cambardella, C.A., Meek, D.W. 2001. Nitrate loss in subsurface drainage as affected by N-fertilizer rate. Journal of Environmental Quality. 30:1305-1314.

PLANT-SOIL-MICROBE N RELATIONSHIPS IN HIGH RESIDUE MANAGEMENT SYSTEMS - (Proceedings)

DINNES, D.L., JAYNES, D.B., KASPAR, T.C., COLVIN, T.S., CAMBARDELLA, C.A., KARLEN, D.L. PLANT-SOIL-MICROBE N RELATIONSHIPS IN HIGH RESIDUE MANAGEMENT SYSTEMS. SOUTH DAKOTA NO TILL ASSOCIATION ANNUAL CONFERENCE. 2001. P. 45-50.

N MANAGEMENT AND HYPOXIA: A RESEARCH FOCUS OF THE USDA-ARS NATIONAL SOIL TILTH LABORATORY - (Abstract Only)

Dinnes, D.L., Jaynes, D.B., Hatfield, J.L., Burkart, M.R., Parkin, T.B., Cambardella, C.A., Karlen, D.L., Colvin, T.S., Kaspar, T.C., James, D.E. 2001. N management and hypoxia: A research focus of the USDA-ARS National Soil Tilth Laboratory. Farm Bureau Members National Convention. American Farm Bureau Federation, Washington, D.C.

TEMPORAL DYNAMICS OF PREFERENTIAL FLOW TO A FIELD TILE - (Proceedings)

Jaynes, D.B., Kung, K.J., Ahmed, S.I., Kanwar, R.S. 2001. Temporal dynamics of preferential flow to a field tile [CD-ROM]. International Symposium on Preferential Flow. ASAE. St. Joseph, MI.

MEASUREMENT OF SOIL HYDRAULIC AND CHEMICAL TRANSPORT PROPERITES - (Proceedings) - (05-Jan-01)

PREFERENTIAL FLOW EFFECTS ON NO3-N LOSSES WITH TILE FLOW - (Proceedings)

BAKHSH, A., KANWAR, R.S., JAYNES, D.B., COLVIN, T.S., AHUJA, L.R. PREFERENTIAL FLOW EFFECTS ON NO3-N LOSSES WITH TILE FLOW. INTERNATIONAL SYMPOSIUM ON PREFERENTIAL FLOW. 2001. P. 41-44.

SIMULATING EFFECTS OF VARIABLE NITROGEN APPLICATION RATES ON CORN YIELDS AND NO3-N LOSSES WITH SUBSURFACE DRAINAGE WATER - (Peer Reviewed Journal)

Bakhsh, A., Kanwar, R.S., Jaynes, D.B., Colvin, T.S., Ahuja, L.R. 2001. Simulating effects of variable nitrogen application rates on corn yields and NO3-N losses with subsurface drainage water. Transactions of the ASAE. 44(2):269-276.

REDUCING N CONTAMINATION OF SURFACE WATERS FROM TILE-DRAINED SOILS AT THE WATERSHED SCALE - (Abstract Only)

Dinnes, D.L., Jaynes, D.B., Meek, D.W., Cambardella, C.A., Colvin, T.S., Hatfield, J.L., Karlen, D.L. 2000. Reducing n contamination of surface waters from tile-drained soils at the watershed scale [CD-ROM]. ASA-CSSA-SSSA Annual Meeting Abstracts. Madison, Wisconsin.

EQUIPMENT AND PROCEDURES FOR SOIL EC MEASUREMENTS - (Abstract Only) - (09-Nov-00)

PRE-CROP HYDROLOGY AND INITIAL RESPONSE OF SOIL QUALITY INDICATORS IN A CONTROLLED RHIZOTRON ENVIRONMENT - (Abstract Only)

Karlen, D.L., Pellack, L.S., Heikens, K.E., Jaynes, D.B. 1999. Pre-crop hydrology and initial response of soil quality indicators in a controlled rhizotron environment [CD-ROM]. ASA-CSSA-SSSA Annual Meeting Abstracts. Madison, Wisconsin.

THE FEASIBILITY OF SHALLOW TDR PROBES TO DESCRIBE SOLUTE TRANSPORT THROUGH UNDISTURBED SOIL CORES - (Peer Reviewed Journal)

LEE, J., HORTON, R., JAYNES, D.B. THE FEASIBILITY OF SHALLOW TDR PROBES TO DESCRIBE SOLUTE TRANSPORT THROUGH UNDISTURBED SOIL CORES. SOIL SCIENCE SOCIETY OF AMERICA JOURNAL. 2002. V. 66(1). P. 53-57.

MANAGERIAL IMPACTS ON PREFERENTIAL FLUID DYNAMICS - (Proceedings) - (20-Aug-00)

YIELD CERTAINTY WITH PLOTS OR FIELDS - (Abstract Only)

Colvin, T.S., Jaynes, D.B., Kaspar, T.C., James, D.E., Meek, D.W. 2000. Yield certainty with plots or fields [CD-ROM]. International Conference on Precision Agriculture Abstracts & Proceedings. St. Paul, Minnesota.

ESTIMATING CORN YIELD USING SIX YEARS OF YIELD DATA AND TERRAIN ATTRIBUTES - (Proceedings) - (19-Jul-00)

WATERSHED SCALE INTENSIVE NITROGEN FERTILIZER MANAGEMENT REDUCES NITROGEN CONTAMINATION OF SURFACE WATERS - (Abstract Only) - (13-Jul-00)

SIMULATING THE IMPACT OF N-FERTILIZER APPLICATION RATES ON NO3-N LOSSES WITH SUBSURFACE DRAINAGE WATER AND CROP YIELD USING RZWQM - (Abstract Only)

BAKHSH, A., KANWAR, R.S., JAYNES, D.B., COLVIN, T.S., AHUJA, L.R. SIMULATING THE IMPACT OF N-FERTILIZER APPLICATION RATES ON NO3-N LOSSES WITH SUBSURFACE DRAINAGE WATER AND CROP YIELD USING RZWQM. ASAE ANNUAL INTERNATIONAL MEETING. 2000. PAPER NO. 00-2071.

AN AUTOREGRESSION MODEL FOR A PAIRED WATERSHED COMPARISON - (Proceedings)

MEEK, D.W., DINNES, D.L., JAYNES, D.B., CAMBARDELLA, C.A., COLVIN, T.S., HATFIELD, J.L., KARLEN, D.L. AN AUTOREGRESSION MODEL FOR A PAIRED WATERSHED COMPARISON. APPLIED STATISTICS IN AGRICULTURE CONFERENCE PROCEEDINGS. 2000. P. 223-231.

AN AUTOREGRESSION MODEL FOR A PAIRED WATERSHED COMPARISON - (Proceedings)

Meek, D.W., Dinnes, D.L., Jaynes, D.B., Cambardella, C.A., Colvin, T.S., Hatfield, J.L., Karlen, D.L. 2000. An autoregression model for a paired watershed comparison. Proceedings of the 12th Applied Statistics In Agriculture Conference. p. 223-231.

USING SOIL ATTRIBUTES AND GIS FOR INTERPRETATION OF SPATIAL VARIABILITY IN YIELD - (Peer Reviewed Journal)

Bakhsh, A., Colvin, T.S., Jaynes, D.B., Kanwar, R.S., Tim, U.S. 2000. Using soil attributes and gis for interpretation of spatial variability in yield. Transactions of the ASAE. 43(4):819-828.

INTENSIVE N FERTILIZER MANAGEMENT EFFECTS ON WATER QUALITY AT THE WATERSHED SCALE - (Abstract Only)

Dinnes, D.L., Jaynes, D.B., Cambardella, C.A., Colvin, T.S., Hatfield, J.L., Karlen, D.L. 2000. Intensive N fertilizer management effects on water quality at the watershed scale. Proceedings of the Watershed Approach to Improving Water Quality: Fact or Fantasy? Soil and Water Conservation Society. p. 95-99.

INTENSIVE N FERTILIZER MANAGEMENT EFFECTS ON WATER QUALITY AT THE WATERSHED SCALE - (Proceedings) - (30-Mar-00)

ASSESSMENT OF MASS BALANCE BREAKTHROUGH CURVES - (Peer Reviewed Journal) - (15-Mar-00)

INTENSIVE NITROGEN FERTILIZER MANAGEMENT EFFECTS ON WATER QUALITY AT THE WATERSHED SCALE - (Abstract Only)

Dinnes, D.L., Jaynes, D.B., Meek, D.W., Cambardella, C.A., Colvin, T.S., Hatfield, J.L., Karlen, D.L. 2000. Intensive nitrogen fertilizer management effects on water quality at the watershed scale. Proceedings of Agriculture and the Environment: A Wake-Up Call for Iowans. Iowa State University Extension, Ames, Iowa.

EVALUATION OF A SIMPLE METHOD FOR ESTIMATING SOLUTE TRANSPORT PARAMETERS: LABORATORY STUDIES - (Peer Reviewed Journal)

Lee, J., Jaynes, D.B., Horton, R. 2000. Evaluation of a simple method for estimating solute transport parameters: Laboratory studies. Soil Science Society of America Journal. 64:492-498.

SPATIO-TEMPORAL ANALYSIS OF YIELD VARIABILITY FOR A CORN-SOYBEAN FIELD IN IOWA - (Peer Reviewed Journal)

Bakhsh, A., Jaynes, D.B., Colvin, T.S., Kanwar, R. 2000. Spatio-temporal analysis of yield variability for a corn-soybean field in Iowa. Transactions of the ASAE. 43(1):31-38.

PREDICTION OF NO3-N LOSSES WITH SUBSURFACE DRAINAGE FROM MANURED AND UAN-FERTILIZED PLOTS USING GLEAMS - (Peer Reviewed Journal)

Bakhsh, A., Kanwar, R.S., Jaynes, D.B., Colvin, T.S., Ahuja, L.R. 2000. Prediction of NO3-N losses with subsurface drainage from manured and uan-fertilized plots using gleams. Transactions of the ASAE. 43(1):69-77.

INTENSIVE N FERTILIZER MANAGEMENT EFFECTS ON WATER QUALITY AT THE WATERSHED SCALE - (Abstract Only)

Dinnes, D.L., Jaynes, D.B., Cambardella, C.A., Colvin, T.S., Hatfield, J.L., Karlen, D.L. 1999. Intensive n fertilizer management effects on water quality at the watershed scale [CD-ROM]. ASA-CSSA-SSSA Annual Meeting Abstracts. Madison, Wisconsin.

RAPID FIELD MEASUREMENTS OF SOIL HYDRAULIC AND SOLUTE TRANSPORT PROPERTIES - (Abstract Only)

Aljabri, S.A., Horton, R., Jaynes, D.B. 1999. Rapid field measurements of soil hydraulic and solute transport properties [CD-ROM]. ASA-CSSA-SSSA Annual Meeting Abstracts. Madison, Wisconsin.

APPLICATION OF SOIL AND WATER ASSESSMENT TOOL (SWAT) TO A TILE-DRAINED WATERSHED - (Abstract Only)

Saleh, A., Arnold, J.G., Jaynes, D.B. 1999. Application of Soil and Water Assessment Tool (SWAT) to a tile-drained watershed. ASA-CSSA-SSSA Annual Meeting Abstracts. Madison, Wisconsin.

LABORATORY EVALUATION OF A TDR METHOD FOR DETERMINING WATER FLOW AND SOLUTE TRANSPORT PARAMETERS - (Abstract Only)

Lee, J.H., Horton, R., Noborio, K., Jaynes, D.B. 1999. Laboratory evaluation of a TDR method for determining water flow and solute transport parameters [CD-ROM]. ASA-CSSA-SSSA Annual Meeting Abstracts. Madison, Wisconsin.

FROM NARROW TRAIL TO FIVE-LANE HIGHWAY - (Abstract Only)

Kung, K.S., Gish, T.J., Jaynes, D.B., Helling, C.S. 1999. From narrow trail to five-lane highway [CD-ROM]. ASA-CSSA-SSSA Annual Meeting Abstracts. Madison, Wisconsin.

A TIME DOMAIN REFLECTOMETRY METHOD TO MEASURE IMMOBILE WATER CONTENT AND MASS EXCHANGE COEFFICIENT - (Peer Reviewed Journal)

LEE, J., HORTON, R., JAYNES, D.B. A TIME DOMAIN REFLECTOMETRY METHOD TO MEASURE IMMOBILE WATER CONTENT AND MASS EXCHANGE COEFFICIENT. SOIL SCIENCE SOCIETY OF AMERICA JOURNAL. 2002. V. 64. P. 1911-1917.

SPLIT APPLICATION NITROGEN FERTILIZER MANAGEMENT EFFECTS ON CORN YIELD AND WATER QUALITY - (Popular Publication)

Dinnes, D.L., Jaynes, D.B., Cambardella, C.A., Colvin, T.S., Hatfield, J.L., Karlen, D.L. 1999. Split application nitrogen fertilizer management effects on corn yield and water quality. Farm Bureau Spokesman Press. 1999 Autumn Harvest Issue. Iowa Farm Bureau, West Des Moines, Iowa.

HERBICIDE AND TRACER MOVEMENT TO SUBSURFACE DRAINS UNDER SIMULATED RAINFALLCONDITIONS - (Abstract Only) - (21-Jul-99)

SIMULATING THE IMPACTS OF PRECISION FARMING AND VARIABLE N-FERTILIZER RATES ON NO3-N LOSSES AND CROP YIELD USING RZWQM - (Abstract Only) - (21-Jul-99)

NITRATE-NITROGEN LOADS IN SUBSURFACE DRAINED SOILS IN CENTRAL IOWA - (Abstract Only) - (11-Jun-99)

APPLYING GIS FOR INTERPRETATION OF SPATIAL VARIABILITY ON YIELD - (Abstract Only) - (01-May-99)

APPLYING GIS FOR INTERPRETATION OF SPATIAL VARIABILITY IN YIELD: A CASE STUDY - (Abstract Only) - (01-May-99)

EFFECTS OF AN OPTIMUM FERTILIZER PROGRAM ON CORN YIELD AND WATERSHED WATER QUALITY - (Abstract Only) - (12-Jan-99)

COMPARING FIELD METHODS THAT ESTIMATE MOBILE-IMMOBILE MODEL PARAMETERS - (Peer Reviewed Journal) - (16-Nov-98)

PARAMETER ESTIMATION FOR THE MOBILE/IMMOBILE (MIM) DOMAIN MODEL - (Abstract Only) - (22-Oct-98)

MODELING WATER AND SOLUTE MOVEMENT UNDER RIDGE-TILLAGE - (Abstract Only) - (22-Oct-98)

EFFECTS OF SOIL BULK ELECTRICAL CONDUCTIVITY ON MEASURING SOIL WATER CONTENT USING TIME DOMAIN REFLECTOMETRY - (Abstract Only) - (22-Oct-98)

MEASUREMENTS OF SOLUTE TRANSPORT PARAMETERS USING RESIDENT CONCENTRATION AND TIME DOMAIN RELECTOMETRY - (Abstract Only) - (22-Oct-98)

EVALUATION OF A SIMPLE TECHNIQUE FOR ESTIMATING TWO-DOMAIN TRANSPORT PARAMETERS - (Peer Reviewed Journal) - (28-Sep-98)

ATRAZINE AND METRIBUZIN IN SOILS, SUBSURFACE DRAINAGE, AND GROUNDWATER - (Abstract Only) - (07-Aug-98)

WATER QUALITY IN WALNUT CREEK WATERSHED: NITRATE-NITROGEN IN SOILS, SUBSURFACE DRAINAGE WATER AND SHALLOW GROUNDWATER - (Peer Reviewed Journal) - (29-Jul-98)

SPATIAL AND TEMPORAL VARIABILITY IN CORN GROWTH, DEVELOPMENT, INSECT PRESSURE, AND YIELD - (Proceedings) - (22-Jul-98)

SPATIOTEMPORAL YIELD VARIABILITY ANALYSIS FOR A CORN-SOYBEAN FIELD IN IOWA - (Proceedings) - (16-Jul-98)

WATER QUALITY IN WALNUT CREEK WATERSHED: HERBICIDES AND NITRATES IN SURFACE WATER - (Peer Reviewed Journal) - (08-Jul-98)

WATER QUALITY IN WALNUT CREEK WATERSHED: HERBICIDES IN SOILS, SUBSURFACE DRAINAGE AND GROUNDWATER - (Peer Reviewed Journal) - (08-Jul-98)

WATER QUALITY IN WALNUT CREEK WATERSHED: SETTING AND FARMING PRACTICES - (Peer Reviewed Journal) - (08-Jul-98)

THE ROLE OF PREFERENTIAL FLOW AS A MECHANISM FOR GROUNDWATER CONTAMINATION I - (Abstract Only) - (29-May-98)

CONTAMINANT TRANSPORT THROUGH PERFERENTIAL FLOW: II QUANTIFY IN REAL TIME - (Abstract Only) - (29-May-98)

EFFECTS OF AN OPTIMUM N FERTILIZER PROGRAM ON CORN YIELD AND WATERSHED WATER QUALITY - (Abstract Only) - (06-May-98)

FIELD PARAMETERIZATION OF THE MOBILE/IMMOBILE DOMAIN MODEL - (Book / Chapter) - (01-Apr-98)

ENVIRONMENTAL IMPACTS OF AGRICULTURAL DRAINAGE IN THE MIDWEST - (Proceedings) - (09-Mar-98)

FIELD SOIL HYDRAULIC AND SOLUTE TRANSPORT MEASUREMENTS AS A FUNCTION OF WATER PRESSURE HEAD - (Peer Reviewed Journal) - (05-Mar-98)

POTENTIAL FOR NITROGEN FERTILIZER VARIABLE RATE MANAGEMENT: A CASE STUDY - (Experiment Station) - (01-Mar-98)

SOLUTE MOVEMENT IN UNCROPPED RIDGE-TILLED SOIL UNDER NATURAL RAINFALL - (Peer Reviewed Journal) - (01-Dec-97)

REDUCING AGRICULTURE'S CONTRIBUTION TO NITRATE CONTAMINATION OF SURFACE WATERS - (Proceedings) - (18-Nov-97)

IMPACT OF MIDWEST FARMING PRACTICES ON SURFACE AND GROUND WATER QUALITY - (Peer Reviewed Journal) - (15-Nov-97)

LABORATORY EXPERIMENTS TO IDENTIFY SOLUTE TRANSPORT PARAMETERS FOR SATURATED SOIL COLUMNS - (Abstract Only) - (31-Oct-97)

VARIABLE WATER CONTENT AND SOLUTE TRANSPORT MEASURED BY TDR - (Abstract Only) - (31-Oct-97)

COMPARING TWO METHODS FOR ESTIMATING FIELD SOLUTE TRANSPORT PROPERTIES - (Abstract Only) - (31-Oct-97)

SPATIAL AND SEASONAL FACTORS AFFECTING CROP YIELD AND N REMOVAL FROM GLACIAL TILL SOILS - (Proceedings) - (10-Sep-97)

SPATIAL DISTRIBUTION OF SOIL ATTRIBUTES AFFECTING CROP YIELD - (Proceedings) - (14-Aug-97)

YIELD VARIABILITY WITHIN A CENTRAL IOWA FIELD - (Peer Reviewed Journal) - (28-Jan-97)

IMMOBILE WATER CONTENT AND MASS EXCHANGE COEFFICIENT OF A FIELD SOIL - (Peer Reviewed Journal) - (23-Jan-97)

SPATIAL VARIABILITY ANALYSIS: A FIRST STEP IN SITE-SPECIFIC MANAGEMENT - (Proceedings) - (20-Nov-96)

FIELD MEASUREMENT OF HYDRAULIC AND PREFERENTIAL FLOW PROPERTIES - (Abstract Only) - (08-Nov-96)

TDR MEASUREMENT OF TRANSIENT SOLUTE TRANSPORT - (Abstract Only) - (08-Nov-96)

HERBICIDE MOVEMENT IN STREAMFLOW: FINDINGS OF THE MANAGEMENT SYSTEMS EVALUATION AREAS (MSEA) PROJECT - (Abstract Only) - (09-Sep-96)

SUBSURFACE LATERAL TRANSPORT IN GLACIAL TILL SOILS DURING A WET YEAR - (Abstract Only) - (25-Jul-96)

A SEQUENTIAL TRACER TECHNIQUE FOR ESTIMATING TWO-DOMAIN SOLUTE TRANSPORT PARAMETERS: I. LABORATORY STUDIES - (Abstract Only) - (23-Jul-96)

A SEQUENTIAL TRACER TECHNIQUE FOR ESTIMATING TWO-DOMAIN SOLUTE TRANSPORT PARAMETERS: II. FIELD STUDIES - (Abstract Only) - (23-Jul-96)

SPATIOTEMPORAL VARIABILITY OF YIELD WITHIN AN IOWA FIELD - (Peer Reviewed Journal) - (19-Jul-96)

MAPPING THE AREAL DISTRIBUTION OF SOIL PARAMETERS WITH GEOPHYSICAL TECHNIQUES - (Book / Chapter) - (15-Jul-96)

IMPROVED SOIL MAPPING USING ELECTROMAGNETIC INDUCTION SURVEYS - (Proceedings) - (26-Jun-96)

SIX YEAR YIELD VARIABILITY WITHIN A CENTRAL IOWA FIELD - (Abstract Only) - (26-Jun-96)

SOIL PROPERTY CONTRIBUTIONS TO YIELD VARIATION PATTERNS - (Abstract Only) - (26-Jun-96)

SOIL PROPERTY CONTRIBUTIONS TO YIELD VARIATION PATTERNS - (Proceedings) - (26-Jun-96)

WATER QUALITY AND FARMING PRACTICES IN AN AGRICULTURAL WATERSHED - (Proceedings) - (06-Jun-96)

DETERMINING SOLUTE TRANSPORT PARAMETERS OF THE MOBILE/IMMOBILE PREFERENTIALFLOW MODEL IN FIELD SOIL - (Abstract Only) - (02-May-96)

AN OVERVIEW OF HYDROLOGIC INVESTIGATIONS IN THE WALNUT CREEK WATERSHED - (Book / Chapter) - (01-Apr-96)

A WATERSHED STUDY TO EVALUATE FARMING PRACTICES ON WATER QUALITY - (Proceedings) - (15-Dec-95)

DETERMINING CLAY LAYER DEPTH BY ELECTROMAGNETIC INDUCTION - (Abstract Only) - (03-Nov-95)

SOIL WATER CONTENT AND SOLUTE MOVEMENT WITH RIDGE-TILLAGE - (Abstract Only) - (03-Nov-95)

SUBSURFACE LATERAL TRANSPORT IN CENTRAL IOWA DURING A WET YEAR - (Abstract Only) - (03-Nov-95)

ANALYTICAL SOLUTION FOR 1-D HEAT CONDUCTION-CONVECTION EQUATION - (Abstract Only) - (03-Nov-95)

FIELD MEASUREMENT OF THE MOBILE/IMMOBILE SOLUTE EXCHANGE COEFFICIENT AND THE MOBILE WATER CONTENT - (Abstract Only) - (03-Nov-95)

SPATIAL VARIABILITY OF HYDRAULIC CONDUCTIVITY IN A CULTIVATED FIELD AT DIFFERENT TIMES - (Peer Reviewed Journal) - (04-Oct-95)

WATERSHED MANAGEMENT TO ACHIEVE ENVIRONMENTAL QUALITY GOALS: A CASE STUDY IN WALNUT CREEK WATERSHED, IOWA - (Proceedings) - (18-Aug-95)

WATERSHED MANAGEMENT TO ACHIEVE ENVIRONMENTAL QUALITY GOALS: A CASE STUDY IN WALNUT CREEK WATERSHED, IOWA - (Abstract Only) - (18-Aug-95)

MAPPING THE AREAL DISTRIBUTION OF SOLUTE TRANSPORT PARAMETERS WITH GEOPHYSICAL TECHNIQUES - (Proceedings) - (05-Jul-95)

PREDICTION OF ATRAZINE PERSISTENCE IN A CENTRAL IOWA FIELD - (Abstract Only) - (05-Apr-95)

ELECTROMAGNETIC INDUCTION AS A MAPPING AID FOR PRECISION FARMING - (Proceedings) - (05-Jan-95)

WALNUT CREEK WATERSHED: LINKING FARMING PRACTICES TO ENVIRONMENTAL QUALITY - (Proceedings) - (05-Jan-95)

PROCESSES CONTROLLING ATRAZINE LEACHING IN THE POTHOLE TOPOGRAPHY OF CENTRAL IOWA - (Proceedings) - (05-Jan-95)

MEASUREMENT AND MODELING SOIL WATER AND SOLUTE TRANSPORT MOVEMENT IN A RIDGE-TILL SYSTEM - (Proceedings) - (05-Jan-95)

EVALUATION OF ATRAZINE FATE IN SOILS WITH THE ROOT ZONE WATER QUALITY MODEL - (Abstract Only) - (18-Nov-94)

SOIL QUALITY RESEARCH AT THE NATIONAL SOIL TILTH LABORATORY - (Abstract Only) - (05-Aug-94)

Last Modified: 05/25/2013

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