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ARS Home » Midwest Area » Ames, Iowa » National Laboratory for Agriculture and The Environment » Soil, Water & Air Resources Research » People & Locations » Timothy Parkin (Tim)

Timothy Parkin (Tim)
Soil, Water & Air Resources Research
Research Microbiologist

Phone: (515) 294-6888
Fax: (515) 294-8125

USDA, ARS
2110 UNIVERSITY BLVD.
AMES , IA 50011
Projects
Reducing the Environmental Footprint from Agricultural Systems through Managing Resources and Nutrient Inputs
In-House Appropriated (D)
  Accession Number: 431574
Coordinated Network of Sites for Studying the Impacts of 4R Nitrogen Management on Crop Production and Nutrient Loss
Trust Fund Cooperative Agreement (T)
  Accession Number: 431941

Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Nitrous oxide emissions from saturated riparian buffers: Are we trading water quality problem for an air quality problem? -
Portable automation of static chamber sample collection for quantifying soil gas flux -
Davis, M.P., Groh, T.A., Parkin, T.B., Williams, R.J., Isenhart, T.M., Hofmockel, K.H. 2018. Portable automation of static chamber sample collection for quantifying soil gas flux. Journal of Environmental Quality. 47(2):270-275. https://doi.org/10.2134/jeq2017.10.0387.
Harvesting fertilized rye cover crop: simulated revenue, net energy, and drainage Nitrogen loss -
Malone, R.W., Obrycki, J., Karlen, D.L., Ma, L., Kaspar, T.C., Jaynes, D.B., Parkin, T.B., Lence, S., Feyereisen, G.W., Fang, Q., Richards, T.L., Gillette, K.L. 2018. Harvesting fertilized rye cover crop: simulated revenue, net energy, and drainage Nitrogen loss. Agricultural and Environmental Letters. 3:170041. https://doi.org/10.2134/ael2017.11.0041.
N loss to drain flow and N2O emissions from a corn-soybean rotation with winter rye -
Gillette, K.L., Malone, R.W., Kaspar, T.C., Ma, L., Parkin, T.B., Jaynes, D.B., Fang, Q.X., Hatfield, J.L., Feyereisen, G.W., Kersebaum, K.C. 2018. N loss to drain flow and N2O emissions from a corn-soybean rotation with winter rye. Science of the Total Environment. 618:982-997. https://doi.org/10.1016/j.scitotenv.2017.09.054.
Long-term research and monitoring of conservation practice effects in Iowa watersheds -
Moorman, T.B., Tomer, M.D., Jaynes, D.B., Kaspar, T.C., Parkin, T.B., Malone, R.W., Isenhart, T.M. 2017. Long-term research and monitoring of conservation practice effects in Iowa watersheds. In: proceedings of UCOWR/NIWR Annual Conference, June 13-15, 2017, Fort Collins, Colorado. Available: http://ucowr.org/files/2017_Conference/proceedings/2017.pdf.
Impact of six lignocellulosic biochars on C and N dynamics of two contrasting soils -
Fidel, R.B., Laird, D.A., Parkin, T.B. 2017. Impact of six lignocellulosic biochars on C and N dynamics of two contrasting soils. Global Change Biology Bioenergy. 9:1279-1291. doi: 10.1111/gcbb.12414.
Impact of broadcasting a cereal rye or oat cover crop before corn and soybean harvest on nitrate leaching -
Kaspar, T.C., Jaynes, D.B., Parkin, T.B., Moorman, T.B. 2016. Impact of broadcasting a cereal rye or oat cover crop before corn and soybean harvest on nitrate. In: Proceedings of ASA-CSSA-SSSA Annual Meeting, November 6-9, 2016, Phoenix, Arizona. Available: https://scisco.confex.com/scisoc/2016am/webprogram/Paper99705.html.
Rye cover crop effects on direct and indirect nitrous oxide emissions -
Parkin, T.B., Kaspar, T.C., Jaynes, D.B., Moorman, T.B. 2016. Rye cover crop effects on direct and indirect nitrous oxide emissions. Soil Science Society of America Journal. 80(6):1551-1559. doi: 10.2136/sssaj2016.04.0120.
Soil water improvements with the long-term use of a winter rye cover crop -
Basche, A.D., Kaspar, T.C., Archontoulis, S., Jaynes, D.B., Sauer, T.J., Parkin, T.B., Miguez, F. 2016. Soil water improvements with the long-term use of a winter rye cover crop. Agricultural Water Management. 172:40-50. doi: 10.1016/j.agwat.2016.04.006.
Microbial community and chemical characteristics of swine manure during maturation -
Trabue, S.L., Kerr, B.J., Bearson, B.L., Hur, M., Parkin, T.B., Wurtele, E.S., Ziemer, C.J. 2016. Microbial community and chemical characteristics of swine manure during maturation. Journal of Environmental Quality. 45(4):1144-1152. doi: 10.2134/jeq2015.09.0446.
Simulating woodchip bioreactor performance using a dual-porosity model -
Jaynes, D.B., Moorman, T.B., Parkin, T.B., Kaspar, T.C. 2016. Simulating woodchip bioreactor performance using a dual-porosity model. Journal of Environmental Quality. 45(3):830-838. doi: 10.2134/jeq2015.07.0342.
Simulating long-term impacts of cover crops and climate change on crop production and environmental outcomes in the midwestern United States -
Basche, A.D., Archontoulis, S., Kaspar, T.C., Jaynes, D.B., Parkin, T.B., Miguez, F. 2016. Simulating long-term impacts of cover crops and climate change on crop production and environmental outcomes in the midwestern United States. Agriculture, Ecosystems and Environment. 218:95-106. doi: 10.1016/j.agee.2015.11.011.
Soil water improvements with the long-term use of a winter rye cover crop -
Basche, A.D., Kaspar, T.C., Archontoulis, S., Jaynes, D.B., Parkin, T.B., Sauer, T.J., Miguez, F. 2015. Soil water improvements with the long-term use of a winter rye cover crop. In: Proceedings of American Geophysical Union 2015 Fall Meeting, December 14-18, 2016, San Francisco, CA.
Denitrification and N2O emissions in annual croplands, perennial grass buffers, and restored perennial grasslands -
Nitrate sinks in perennial vegetation filter strips in the toeslopes of agricultural watersheds -
Gas chromatograph analysis on closed air and nitrogen oxide storage atmospheres of recalcitrant seeds of Quercus Alba -
Trace gas fluxes from a northern mixed-grass prairie interseeded with alfalfa Reprint Icon -
Ingram, L.J., Schuman, G., Parkin, T.B., Mortenson, M.C. 2014. Trace gas fluxes from a northern mixed-grass prairie interseeded with alfalfa. Plant and Soil. 386:285-301.
Nitrous oxide emissions from intensively managed agroecosystems: The role of carbon inputs -
Castellano, M.J., Basche, A., Iqball, J., Kaspar, T.C., Miguez, F., Mitchell, D.C., Parkin, T.B. 2013. Nitrous oxide emissions from intensively managed agroecosystems: The role of carbon inputs. American Geophysical Union Meeting Abstract Database. Available at: http://abstractsearch.agu.org/meetings/2013/FM/sections/B/sessions/B14C/abstracts/B14C-01.html.
Rye cover crop effects on nitrous oxide emissions from a corn-soybean system -
Parkin, T.B., Kaspar, T.C., Jaynes, D.B., Moorman, T.B. 2013. Rye cover crop effects on nitrous oxide emissions from a corn-soybean system [abstract]. ASA-CSSA-SSSA Annual Meeting Abstracts, November 3-6, 2013, Tampa, FL.
Enhanced efficiency fertilizers: Effects on agronomic performance of corn in Iowa Reprint Icon -
Hatfield, J.L., Parkin, T.B. 2014. Enhanced efficiency fertilizers: Effect on agronomic performance in Iowa. Agronomy Journal. 106(2):771-780.
Nitrous oxide emissions from cropland: A procedure for calibrating the DayCent biogeochemical model using inverse modelling -
Enhanced efficiency fertilizers: Effect on nitrous oxide emissions in Iowa Reprint Icon -
Parkin, T.B., Hatfield, J.L. 2014. Enhanced efficiency fertilizers: Effect on nitrous oxide emissions in Iowa. Agronomy Journal. 106(2):694-702.
Data analysis considerations -
Venterea, R.T., Parkin, T.B., Cardebas, L., Petersen, S.O., Petersen, A.R. 2013. Data analysis considerations. In: DeKlein, C., Harvey, M., editors. Global Research Alliance on Agricultural Greenhouse Gas Emissions. New Zealand Ministry for Primary Industries, Wellington, New Zealand. Available: http://www.globalresearchalliance.org/research/livestock/activities/nitrous-oxide-chamber-methodology-guidelines/.
Spatial variation of CO2 fluxes in corn and soybean fields -
Hatfield, J.L., Parkin, T.B. 2012. Spatial variation of CO2 fluxes in corn and soybean fields. Agricultural Sciences. 3:986-995.
Effectiveness of oat and rye cover crops in reducing nitrate losses in drainage water -
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.
Calculating the detection limits of chamber-based soil greenhouse gas flux measurements -
Parkin, T.B., Venterea, R.T., Hargreaves, S.K. 2012. Calculating the detection limits of chamber-based soil greenhouse gas flux measurements. Journal of Environmental Quality. 41(3):705-715. DOI:10.2134/jeq2011.0394.
Nitrogen management: Unraveling the effects of timing and form -
Hatfield, J.L., Parkin, T.B. 2011. Nitrogen management: Unraveling the effects of timing and form. North Central Extension Industry Soil Fertility Conference Proceedings. 27:42-48.
Agricultural management and greenhouse gas flux: cropland management in eastern and central US -
Cavigelli, M.A., Parkin, T.B. 2012. Agricultural management and greenhouse gas flux: cropland management in eastern and central US. In: Liebig, M.A., Franzluebbers, A.J., Follett, R.F., editors. Managing Agricultural Greenhouse Gases. London, England: Academic Press. p. 177-233.
Calculating the detection limits of chamber-based greenhouse gas flux measurements -
Parkin, T.B., Venterea, R.T., Hargreaves, S.K. 2011. Calculating the detection limits of chamber-based greenhouse gas flux measurements. American Society of Agronomy Annual Meetings [abstracts]. ASA-CSSA-SSSA Annual Meeting. Oct. 16-19, 2011, San Antonio, TX. CD-ROM.
Effectiveness of oat and rye cover crops in reducing nitrate losses in drainage water -
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.
Soil CO2 flux in response to wheel traffic in a no-till system -
Kaspar, T.C., Parkin, T.B. 2011. Soil CO2 flux in response to wheel traffic in a no-till system. Soil Science Society of America Journal. 75:2296-2304.
Carbon dioxide fluxes in corn-soybean rotations in the Midwestern U.S.: Inter- and intra-annual variations, and biophysical controls -
Hernandez-Ramirez, G., Hatfield, J.L., Parkin, T.B., Sauer, T.J., Prueger, J.H. 2011. Carbon dioxide fluxes in corn-soybean rotations in the Midwestern U.S.: Inter- and intra-annual variations, and biophysical controls. Agriculture and Forest Meterology. 12:1831-1842.
Quantifying biases in non-steady state chamber measurements of soil-atmosphere gas exchange -
Venterea, R.T., Parkin, T.B. 2012. Quantifying biases in non-steady state chamber measurements of soil-atmosphere gas exchange. In: Liebig, M., Follett, R., Franzluebbers, A., Editors. Managing Agricultural Greenhouse Gases: Coordinated Agricultural Research through GRACEnet to Address our Changing Climate. Waltham, MA: Academic Press. p. 327-343.
Mitigation opportunities from land management practices in a warming world: Increasing potential sinks -
Hatfield, J.L., Parkin, T.B., Sauer, T.J., Prueger, J.H. 2012. Mitigation opportunities from land management practices in a warming world: Increasing potential sinks. In: Liebig, M.A., Franzluebbers, A.T., and Follett, R.F., editors. Managing Agricultural Greenhouse Gases. London, England: Academic Press. p. 487-504.
Conservation practices and their potential to mitigate climate change -
Hatfield, J.L., Parkin, T.B., Sauer, T.J., Prueger, J.H. 2011. Conservation practices and their potential to mitigate climate change. American Society of Agronomy Annual Meetings [abstracts]. ASA-CSSA-SSSA Annual Meeting. Oct. 16-19, 2011, San Antonio, TX. CD-ROM.
Conservation practices and their potential to mitigate climate change -
Hatfield, J.L., Parkin, T.B., Sauer, T.J., Prueger, J.H. 2011. Conservation practices and their potential to mitigate climate change [abstract]. Soil and Water Conservation Society, July 17-20, 2011, Washington, DC. CD-ROM.
USDA-ARS GRACEnet Project Protocols, Chapter 3. Chamber-based trace gas flux measurements4 Reprint Icon -
Parkin, T.B., Venterea, R.T. 2010. USDA-ARS GRACEnet Project Protocols, Chapter 3. Chamber-based trace gas flux measurements4. In: Follett, R.F., editor. Sampling Protocols. Beltsville, MD. Available at: http://www.ars.usda.gov/SP2UserFiles/Program/212/Chapter%203.%20GRACEnet%20Trace%20Gas%20Sampling%20Protocols.pdf. p. 1-39.
Impact of biochar on manure carbon stabilization and greenhouse gas emissions -
The effect of enhanced-efficiency fertilizers on nitrous oxide emissions from various cropping systems Reprint Icon -
Halvorson, A.D., Del Grosso, S.J., Venterea, R.T., Rosen, C., Smith, J.L., Parkin, T.B., Hatfield, J.L., Sistani, K.R., Dell, C.J., Watts, D.B. 2010. The effect of enhanced-efficiency fertilizers on nitrous oxide emissions from various cropping systems. Meeting Abstract. p - see link above
Denitrification Activity, Wood Loss, and N2O Emissions Over 9 Years From a Wood Chip Bioreactor -
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.
Influence of nitrapyrin on N2O losses from soil receiving fall-applied anhydrous ammonia Reprint Icon -
Parkin, T.B., Hatfield, J.L. 2010. Influence of nitrapyrin on N2O losses from soil receiving fall-applied anhydrous ammonia. Agriculture, Ecosystems and Environment. 136:81-86.
Methane Flux in Cropland and Adjacent Riparian Buffers with Different Vegetation Covers Reprint Icon -
Kim, D., Isenhart, T.M., Parkin, T.B., Schultz, R.C., Loynachan, T.E. 2010. Methane Flux in Cropland and Adjacent Riparian Buffers with Different Vegetation Covers. Journal of Environmental Quality. 39:97-105.
Cover Crop Effects on Nitrous Oxide Emission from a Manure-Treated Mollisol Reprint Icon -
Jarecki, M.K., Parkin, T.B., Chan, A.S., Kaspar, T.C., Moorman, T.B., Singer, J.W., Kerr, B.J., Hatfield, J.L., Jones, R. 2009. Cover Crop Effects on Nitrous Oxide Emission from a Manure-Treated Mollisol. Agriculture, Ecosystems and Environment. 134(1-2):29-35.
Nitrous Oxide Emissions from a Bermudagrass Pasture: Interseeded Winter Rye and Poultry Litter -
Sauer, T.J., Compston, S.R., West, C.P., Hernandez Ramirez, G., Gbur, E.E., Parkin, T.B. 2009. Nitrous Oxide Emissions from a Bermudagrass Pasture in Arkansas: Poultry Litter and Interseeded Winter Rye. Soil Biology and Biochemistry. 41(7):1417-1424.
Denitrification in Wood Chip Bioreactors at Different Water Flows -
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.
Carbon dioxide emissions in fallow periods of a corn-soybean rotation: eddy-covariance versus chamber methods -
Hernandez Ramirez, G., Parkin, T.B., Hatfield, J.L., Sauer, T.J., Prueger, J.H. 2009. Carbon dioxide emissions in fallow periods of a corn-soybean rotation: eddy-covariance versus chamber methods [abstract]. North American Carbon Program Meeting (NACP)-February 17-20, 2009 in San Diego, CA. Available: http://www.nacarbon.org/cgi-bin/meeting_2009/mtg2009_ab_search.pl?action=3&ab_id=41
Energy Balance and Turbulent Flux Partitioning in a Corn-soybean Rotation in the Midwestern U.S. -
Hernandez Ramirez, G., Hatfield, J.L., Parkin, T.B., Prueger, J.H., Sauer, T.J. 2010. Energy Balance and Turbulent Flux Partitioning in a Corn-soybean Rotation in the Midwestern U.S. Journal of Theoretical and Applied Climatology. 100:79-92.
Greenhouse gas emission in dependence on soil structure, and nitrogen and carbon availability -
Jarecki, M., Parkin, T.B., Chan, A., Hatfield, J.L., Jones, R. 2008. Greenhouse Gas Emission in Dependence on Soil Structure, and Nitrogen and Carbon Availability, [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, October 5-9, 2008, Houston, TX.
Greenhouse Gas Emission from Corn Rotations and Perennial Grasses in Iowa Grown for Biofuel Production -
Jarecki, M., Parkin, T.B., Chan, A., Hatfield, J.L., Jones, R. 2008. Greenhouse Gas Emission from Corn Rotations and Perennial Grasses in Iowa Grown for Biofuel Production, [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, October 5-9, 2008, Houston, TX.
Comparison of soil CO2 fluxes by eddy-covariance and chamber methods in fallow periods of a corn-soybean rotation -
Hernandez Ramirez, G., Parkin, T.B., Hatfield, J.L., Sauer, T.J., Prueger, J.H. 2008. Comparison of soil CO2 fluxes by eddy-covariance and chamber methods in fallow periods of a corn-soybean rotation [abstract]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, October 5-8, 2008, Houston, TX. CD-ROM
Nitrous Oxide Emissions from Riparian Forest Buffers, Warm-Season and Cool-Season Grass Filters, and Crop Fields -
Kim, D., Isenhart, T.M., Parkin, T.B., Schultz, R.C., Loynachan, T.E., Raich, J.R. 2009. Nitrous Oxide Emissions from Riparian Forest Buffers, Warm-Season and Cool-Season Grass Filters, and Crop Fields. Biogeosciences. 6:607-650.
Comparison of DAYCENT-Simulated and Measured Nitrous Oxide Emission from a Corn Field -
Jarecki, M.K., Parkin, T.B., Chan, A.K., Hatfield, J.L., Jones, R. 2008. Comparison of DAYCENT-Simulated and Measured Nitrous Oxide Emission from a Corn Field. Journal of Environmental Quality. 37:1685-1690.
Effect of Sampling Frequency on Estimates of Cumulative N20 Emissions -
Parkin, T.B. 2008. Effect of Sampling Frequency on Estimates of Cumulative N20 Emissions. Journal of Environmental Quality. 37:1390-1395.
Potential Methods for Reducing Nitrate Losses in Artificially Drained Fields -
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.
A subsurface, closed-loop system for soil carbon dioxide and its application to the gradient efflux approach -
De Sutter, T.M., Sauer, T.J., Parkin, T.B., Heitman, J.L. 2008. A subsurface, closed-loop system for soil carbon dioxide and its application to the gradient efflux approach. Soil Science Society of America Journal. 72:126-134.
Greenhouse gases emission from two soils under N fertilizer and swine slurry -
Jarecki, M.K., Parkin, T.B., Chan, A.S., Hatfield, J.L., Meek, D.W., Jones, R. 2008. Greenhouse gases emission from two soils under N fertilizer and swine slurry. Journal of Environmental Quality. 37:1432-1438.
Rye Cover Crop and Gamagrass Strip Effects on NO3 Concentration and Load in Tile Drainage -
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.
CO2 and H2O Vapor Exchanges across Growing Seasons in Rainfed Corn-Soybean Systems -
Prueger, J.H., Hatfield, J.L., Parkin, T.B., Sauer, T.J. 2007. CO2 and H20 vapor exchanges across growing seasons in rainfed corn-soybean systems [abstract]. 4th USDA Greenhouse Gas Conference, February 5-8, 2007, Baltimore, Maryland. CD-ROM.
Gas and Water Vapor Exchanges in Rainfed Corn-Soybean Systems -
Prueger, J.H., Hatfield, J.L., Parkin, T.B., Sauer, T.J. 2007. Gas and Water Vapor Exchanges in Rainfed Corn-Soybean Systems [abstract]. NACP Investigators Meeting, January 22-26, 2007, Colorado Springs, Colorado. CD-ROM.
Soil Respiration in Response to Landscape Position -
Desutter, T.M., Parkin, T.B., Kaspar, T.C., Sauer, T.J., Hatfield, J.L. 2006. Soil Respiration in Response to Landscape Position [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Nov. 12-16, 2006, Indianapolis, IN.
GRACEnet (Greenhouse Gas Reduction through Agricultural Carbon Enhancement network): An assessment of soil carbon sequestration and greenhouse gas mitigation by agricultural management -
Stott, D.E., Cavigelli, M.A., Dell, C.J., Del Grosso, S.J., Follett, R.F., Franzluebbers, A.J., Johnson, J.M., Liebig, M.A., Parkin, T.B., Smith, J.L. 2007. GRACEnet (Greenhouse Gas Reduction through Agricultural Carbon Enhancement network): an assessment of soil carbon sequestration and greenhouse gas mitigation by agricultural management. 4th USDA Greenhouse Gas Symposium, February 5-8, 2007, Baltimore, Maryland. 2007 CDROM.
Cover Crop Effects on the Fate of Swine Manure-N Applied to Soil -
Kaspar, T.C., Parkin, T.B., Singer, J.W. 2006. Cover Crop Effects on the Fate of Swine Manure-N Applied to Soil [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts. Nov. 12-16, 2006, Indianapolis, IN.
Emission of the Greenhouse Gas Nitrous Oxide (N2O) from Riparian Forest Buffers, Warm-Season and Cool-Season Grass Filters and Crop Fields -
Kim, D., Schultz, R.C., Isenhart, T.M., Parkin, T.B., Raich, J.W., Loynachan, T.E. 2006. Emission of the Greenhouse Gas Nitrous Oxide (N2O) from Riparian Forest Buffers, Warm-Season and Cool-Season Grass Filters and Crop Fields [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts. Nov. 12-16, 2006, Indianapolis, IN.
Field measurement results versus DAYCENT simulations in nitrous oxide emission from agricultural soil in Central Iowa -
Jarecki, M.K., Parkin, T.B., Chan, A., Kaspar, T.C., Hatfield, J.L., Jones, R.A. 2006. Field measurement results versus DAYCENT simulations in nitrous oxide emission from agricultural soil in Central Iowa [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts. Nov. 12-16, 2006, Indianapolis, IN.
Effect of cover crop in mitigation of greenhouse gases emission from plots amended with swine manure -
Jarecki, M.K., Parkin, T.B., Chan, A., Moorman, T.B., Singer, J.W., Hatfield, J.L., Meek, D.W., Jones, R.A. 2006. Effect of cover crop in mitigation of greenhouse gases emission from plots amended with swine manure [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts. Nov. 12-16, 2006, Indianapolis, IN.
Field Comparison of Methods for Measuring Soil CO2 Flux -
Parkin, T.B., De Sutter, T.M., Prueger, J.H., Kaspar, T.C., Sauer, T.J. 2006. Field Comparison of Methods for Measuring Soil CO2 Flux [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts. Nov. 12-16, 2006, Indianapolis, IN.
ROLE OF MICROMETEOROLOGICAL METHODS TO QUANTIFY GREENHOUSE GAS FLUXES IN AGRICULTURAL SYSTEMS -
Hatfield, J.L., Prueger, J.H., Parkin, T.B., Sauer, T.J., Desutter, T.M. 2006. Role of micrometeorological methods to quantify greenhouse gas fluxes in agricultural systems [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts. Nov. 12-16, 2006, Indianapolis, IN.
In-Field Bioreactor for Removing Nitrate from Tile Drainage -
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.
NITROUS OXIDE EMISSIONS FROM CORN/SOYBEAN SYSTEMS IN THE MIDWEST -
Parkin, T.B., Kaspar, T.C. 2006. Nitrous oxide emissions from corn/soybean systems in the Midwest. Journal of Environmental Quality. 35:1496-1506.
GREENHOUSE GAS REDUCTION THROUGH AGRICULTURAL CARBON ENHANCEMENT NETWORK (GRACENET)-PROGRESS REPORT -
Follett, R.F., Johnson, J.M., Parkin, T.B., Smith, J.L., Franzluebbers, A.J., Sainju, U.M., Zobeck, T.M., Collins, H.P., Mikha, M.M. 2006. Greenhouse gas reduction through agricultural carbon enhancement network (gracenet)-progress report. Agricultural Research Service Publication.
COVER CROP EFFECTS ON THE FATE OF SWINE MANURE-N APPLIED TO SOIL -
Parkin, T.B., Kaspar, T.C., Singer, J.W. 2006. Cover crop effects on the fate of swine manure-N applied to soil. Plant and Soil Journal. 289:141-152.
AGRICULTURAL EXHAUST: A REASON TO INVEST IN SOIL -
Franzluebbers, A.J., Follett, R.F., Johnson, J.M., Liebig, M.A., Gregorich, E.G., Parkin, T.B., Smith, J.L., Del Grosso, S.J., Jawson, M.D., Martens, D.A. 2006. Agricultural exhaust: a reason to invest in soil. Journal of Soil and Water Conservation. 61(3):98A-101A.
POROUS TUBING FOR USE IN MONITORING SOIL CO2 CONCENTRATIONS -
Desutter, T.M., Sauer, T.J., Parkin, T.B. 2006. Porous tubing for use in monitoring soil CO2 concentrations. Soil Biology and Biochemistry. 38:2676-2681.
EXAMINING CHANGES IN SOIL ORGANIC CARBON WITH OAT AND RYE COVER CROPS USING TERRAIN COVARIATES -
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.
MANURE COMPOSITION OF SWINE AS AFFECTED BY DIETARY PROTEIN AND CELLULOSE CONCENTRATION -
Kerr, B.J., Ziemer, C.J., Trabue, S.L., Crouse, J.D., Parkin, T.B. 2006. Manure composition of swine as affected by dietary protein and cellulose concentration. Journal of Animal Science. 84:1584-1592.
EFFECTS OF A RYE COVER CROP AND A PERMANENT GAMAGRASS STRIP ON NITRATE LOAD IN TILE DRAINAGE -
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.
CONTINUOUS, LONG-TERM MEASUREMENT OF SOIL CARBON DIOXIDE FLUXES USING POROUS TUBING -
Desutter, T.M., Sauer, T.J., Parkin, T.B. 2005. Continuous, long-term measurement of soil carbon dioxide fluxes using porous tubing [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Nov. 6-10, 2005, Salt Lake City, UT.
COMPARING CARBON SUBSTRATES FOR DENITRIFICATION OF SUBSURFACE DRAINAGE WATER -
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.
TOWER AND AIRCRAFT EDDY COVARIANCE MEASUREMENTS OF WATER VAPOR, ENERGY AND CARBON DIOXIDE FLUXES DURING SMACEX -
Prueger, J.H., Hatfield, J.L., Kustas, W.P., Hipps, L.E., Macpherson, J.I., Neale, C., Eichinger, W.E., Cooper, D.I., Parkin, T.B. 2005. Tower and aircraft eddy covariance measurements of water vapor, energy and carbon dioxide fluxes during SMACEX. Journal of Hydrometeorology. 6:954-960.
PHOSPHORUS GEOCHEMISTRY IN GROUNDWATER IN THE CLEAR LAKE WATERSHED, NORTH-CENTRAL IOWA -
BACTERIAL ACTIVITY, COMMUNITY STRUCTURE, AND DEGREE OF SPATIAL HEREROGENEITY ON THE SMALL SCALE AT A LONG-TERM CONTAMINATED SITE -
Becer, J.M., Parkin, T.B., Nakastu, C.H., Wilbur, J., Konopka, A. 2006. Bacterial activity, community structure, and degree of spatial hererogeneity on the small scale at a long-term contaminated site. Microbial Ecology. 51(2):220-231.
RELATIONSHIP OF SOIL RESPIRATION TO CROP AND LANDSCAPE IN THE WALNUT CREEK WATERSHED -
Parkin, T.B., Kaspar, T.C., Senwo, Z., Prueger, J.H., Hatfield, J.L. 2005. Relationship of soil respiration to crop and landscape in the Walnut Creek watershed. Journal of Hydrometeorology. 6(6):812-824.
NITROUS OXIDE EMISSIONS FROM MIDWEST CORN/SOYBEAN CROPPING SYSTEMS -
Parkin, T.B., Kaspar, T.C. 2005. Nitrous oxide emissions from midwest corn/soybean cropping systems. USDA Greenhouse Gas Symposium. http://soilcarboncenter.k-state.edu/conference/Abstract_Pages.htm.
FILLING DATA GAPS IN SOIL RESPIRATION MEASUREMENTS USING AUTOCORRELATION -
Parkin, T.B., Kaspar, T.C. 2005. Filling data gaps in soil respiration measurements using autocorrelation. USDA Greenhouse Gas Symposium. http://soilcarboncenter.k-state.edu/conference/Abstract_Pages.htm
ROLE OF ORGANIC CARBON FROM SURFICIAL AQUITARDS IN LIMITING DEGRADATION OF WATER QUALITY IN THE MIDWEST CORN BELT -
SOIL CO2 FLUX ON A HILLSLOPE TRANSECT IN RELATION TO TERRAIN VARIABLES, SOIL TEXTURE, SOIL OM, AND RESIDUE INPUTS -
Kaspar, T.C., Parkin, T.B. 2004. Soil CO2 Flux on a Hillslope Transect in Relation to Terrain Variables, Soil Texture, Soil OM, and Residue Inputs [CD-ROM]. ASA-CSSA-SSSA Annual Meeting Abstracts. Madison, Wisconsin.
GRACENET: GREENHOUSE GAS REDUCTION THROUGH AGRICULTURAL CARBON ENHANCEMENT NETWORK -
Jawson, M.D., Shafer, S.R., Franzluebbers, A.J., Parkin, T.B., Follett, R.F. 2005. Gracenet: Greenhouse gas reduction through agricultural carbon enhancement network. International Journal of Soil and Tillage Research. 83:167-172.
IMPACT OF NITROGEN FERTILIZATION AND CROPPING SYSTEM ON CARBON SEQUESTRATION IN MID-WESTERN CORN BELT MOLLISOLS -
Russell, A.R., Laird, D.A., Parkin, T.B., Mallarino, A. 2005. Impact of nitrogen fertilization and cropping system on carbon sequestration in mid-western corn belt mollisols. Soil Science Society of America Journal. 69(2):413-422.
POTENTIAL METHODS FOR REDUCING NITRATE LOSSES IN ARTIFICIALLY DRAINED FIELDS -
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 -
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.
TEMPORAL VARIABILITY OF SOIL C02 FLUX: EFFECT OF SAMPLING FREQUENCY ON CUMULATIVE CARBON LOSS ESTIMATION -
Parkin, T.B., Kaspar, T.C. 2004. Temporal variability of soil C02 flux: effect of sampling frequency on cumulative carbon loss estimation. Soil Science Society of America Journal. 68(4):1234-1241.
RECREATING NATURAL RIPARIAN BUFFERS IN AGROECOSYSTEMS -
Schultz, R.C., Isenhart, T., Simpkins, W.W., Colletti, J., Raich, J., Mickelson, T., Cambardella, C.A., Parkin, T.B. 2003. Recreating natural riparian buffers in agroecosystems [CD-ROM]. ASA-CSSA-SSSA Annual Meeting Abstracts. Madison, Wisconin.
CHANGES IN SOIL CARBON RESPONSE TO YEAR, PREVIOUS CROP, AND COVER CROP -
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.
STIMULATION OF DENITRIFICATION AND NITRATE REMOVAL FROM SUBSURFACE DRAINAGE WATER -
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.
CARBON DIOXIDE DYNAMICS DURING A GROWING SEASON IN MIDWESTERN CROPPING SYSTEMS -
Prueger, J.H., Hatfield, J.L., Parkin, T.B., Kustas, W.P., Kaspar, T.C. 2003. Carbon Dioxide Dynamics During a Growing Season in Midwestern Cropping Systems. Environmental Management. 33(1):330-343.
TEMPERATURE CONTROLS ON DIURNAL CO2 FLUX: IMPLICATIONS FOR ESTIMATING SOIL C LOSS -
PARKIN, T.B., KASPAR, T.C. 2003. TEMPERATURE CONTROLS ON DIURNAL CO2 FLUX: IMPLICATIONS FOR ESTIMATING SOIL C LOSS. SOIL SCIENCE SOCIETY OF AMERICA JOURNAL. 67:1763-1772.
SPECIES, ROTATION-LENGTH, AND LIFE-FORM-DIVERSITY EFFECTS ON SOIL CARBON IN EXPERIMENTAL TROPICAL ECOSYSTEMS -
RUSSELL, A.E., CAMBARDELLA, C.A., EWEL, J.J., PARKIN, T.B. SPECIES, ROTATION-LENGTH, AND LIFE-FORM-DIVERSITY EFFECTS ON SOIL CARBON IN EXPERIMENTAL TROPICAL ECOSYSTEMS. ECOLOGICAL APPLICATIONS. 2004. V. 14(1). P. 47-60.
DENITRIFICATION-BASED REMOVAL OF NITRATE FROM SUBSURFACE DRAINAGE WATER -
IMPACT OF SAMPLING FREQUENCY ON SOIL CO2 FLUX ESTIMATION -
PARKIN, T.B., KASPAR, T.C. IMPACT OF SAMPLING FREQUENCY ON SOIL CO2 FLUX ESTIMATION. ASA-CSSA-SSSA ANNUAL MEETING ABSTRACTS. 2002. CD-ROM. MADISON, WI.
SUBSURFACE DRAINAGE MODIFICATIONS TO REDUCE NITRATE LOSSES IN DRAINAGE -
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.
OAT PLANT EFFECTS ON NET NITROGEN MINERALIZATION -
PARKIN, T.B., KASPAR, T.C., CAMBARDELLA, C.A. OAT PLANT EFFECTS ON NET NITROGEN MINERALIZATION. PLANT AND SOIL JOURNAL. 2002. V. 243. P. 187-195.
SMALL GRAIN COVER CROPS FOR IOWA -
KASPAR, T.C., PARKIN, T.B., KOHLER, K.A. SMALL GRAIN COVER CROPS FOR IOWA. INTEGRATED CROP MANAGEMENT CONFERENCE PROCEEDINGS. 2001. P. 85-89.
TEMPORAL VARIABILITY OF SOIL RESPIRATION -
PARKIN, T.B., KASPAR, T.C. TEMPORAL VARIABILITY OF SOIL RESPIRATION. ASA-CSSA-SSSA ANNUAL MEETING ABSTRACTS. 2001. CD-ROM. MADISON, WI.
SPATIAL AND TEMPORAL VARIABILITY OF SOIL CARBON -
KASPAR, T.C., PARKIN, T.B., CAMBARDELLA, C.A., KARLEN, D.L., TOMER, M.D. SPATIAL AND TEMPORAL VARIABILITY OF SOIL CARBON. ASA-CSSA-SSSA ANNUAL MEETING ABSTRACTS. 2001. CD-ROM. MADISON, WI.
METHANE OXIDATION AND PRODUCTION ACTIVITY IN SOILS FROM NATURAL AND AGRICULTURAL ECOSYSTEMS -
CHAN, A.S., PARKIN, T.B. METHANE OXIDATION AND PRODUCTION ACTIVITY IN SOILS FROM NATURAL AND AGRICULTURAL ECOSYSTEMS. JOURNAL OF ENVIRONMENTAL QUALITY. 2001. V. 30. P. 1896-1903.
NITROUS OXIDE EMISSIONS FROM POULTRY LITTER-AMENDED BERMUDAGRASS PASTURES -
Compston, S.R., West, C.P., Sauer, T.J., Parkin, T.B. 2001. Nitrous oxide emissions from poultry litter-amended bermudagrass pastures. American Forage and Grassland Conference Proceedings. 10:126-130.
N MANAGEMENT AND HYPOXIA: A RESEARCH FOCUS OF THE USDA-ARS NATIONAL SOIL TILTH LABORATORY -
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.
IMPACT OF LAND USE ON METHANE FLUX FROM SOIL -
USING THE WEIGHT-LOSS-ON-IGNITION METHOD TO MEASURE SPATIAL VARIABILITY OF SOIL CARBON -
Automated gas sampling system for laboratory analysis of CH4 and N2O -
Arnold, S.L., Parkin, T.B., Doran, J.W., Mosier, A.R. 2001. Automated gas sampling system for laboratory analysis of CH4 and N2O. Communications in Soil Science and Plant Analysis 32:2795-2807.
EVALUATION OF POTENTIAL INHIBITORS OF METHANOGENESIS AND METHANE OXIDATION IN SOIL -
GASEOUS NITROGEN EMISSIONS FROM ANEROBIC SWINE-LAGOONS: AMMONIA, NITROUS OXIDE, AND DINITROGEN GAS -
DECOMPOSITION OF BURIED ROOT RESIDUES IN THE FIELD -
OAT AND RYE ROOT DECOMPOSITION EFFECTS ON NITROGEN MINERALIZATION -
NITRATE-NITROGEN LOADS IN SUBSURFACE DRAINED SOILS IN CENTRAL IOWA -
MICROBIAL NITROGEN TRANSFORMATIONS IN EARTHWORM BURROWS -
SEDIMENT AS A CARBON SOURCE FOR THE SUBMERSED MACROPHYTE VALLISNERIA -
OAT AND RYE ROOT DECOMPOSITION EFFECTS ON CARBON AND NITROGEN CYCLING IN A CONTROLLED ENVIRONMENT -
PLANT EFFECTS ON NITROGEN MINERALIZATION -
FUNGAL PRESENCE IN PAIRED CULTIVATED AND UNCULTIVATED SOILS IN CENTRAL IOWA -
WATER QUALITY IN WALNUT CREEK WATERSHED: NITRATE-NITROGEN IN SOILS, SUBSURFACE DRAINAGE WATER AND SHALLOW GROUNDWATER -
REDUCED CO2 RELEASE FROM WHEAT STRAW UNDER N-LIMITING CONDITIONS: SIMULATION OF CARBON TURNOVER -
PRELIMINARY HYDROGEOLOGIC CHARACTERIZATION OF A RIPARIAN MANAGEMENT SYSTEM IN CENTRAL IOWA -
COMPARISON OF CHAMBER AND MICROMET METHODS FOR DETERMINING METHANE FLUX FROM PEATLAND SOIL -
IN-SITU DENITRIFICATION RATE MEASUREMENT IN SATURATED SOILS BY ACETYLENE BLOCK -
ACETYLENE TRANSPORT IN SATURATED SOIL MESOCOSM FOR IN SITU DENITRIFICATION RATE MEASUREMENT -
IMPACT OF SWINE MANURE ON METHANOTROPHIC AND METHANOGENIC ACTIVITY IN SOILS -
USING SMALL GRAIN COVER CROPS TO MANAGE NITROGEN IN THE MIDWEST -
CONFINING UNITS ARE NOT CREATED EQUAL: QUATERNARY HISTORY AND ITS CONTROL ON PHYSICAL AND BIOGEOCHEMICAL PROCESSES -
RELATIONSHIP OF SOIL ERGOSTEROL CONCENTRATION AND FUNGAL BIOMASS -
SOIL PROPERTY CONTRIBUTIONS TO YIELD VARIATION PATTERNS -
SOIL PROPERTY CONTRIBUTIONS TO YIELD VARIATION PATTERNS -
IMPACT OF CRP ON SOIL QUALITY -
QUANTITATIVE INDICATORS OF SOIL QUALITY: A MINIMUM DATA SET -
CH4 FLUX ESTIMATES FROM NATURAL AND AGRICULTURAL ECOSYSTEMS -
FIELD AND LABORATORY TESTS OF SOIL RESPIRATION -
SUBSURFACE GEOLOGY: A KEY TO UNDERSTANDING WATER QUALITY PROBLEMS -
SOIL QUALITY RESEARCH AT THE NATIONAL SOIL TILTH LABORATORY -