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Agricultural Research Service United States Department of Agriculture
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Timothy B Parkin (Tim)
Soil, Water, and Air Resources Research Unit
Microbiologist

Phone: (515) 294-6888
Fax: (515) 294-8125
Room 316
2110 UNIVERSITY BOULEVARD
NLAE
AMES, IA, 50011-3120

Projects
Trace Gas Exchanges in Midwest Cropping Systems
Appropriated (D)
  Accession Number: 409178
Field Scale Evaluation of Nitrogen, Carbon, Soil Water, Crop Growth Interactions
Specific Cooperative Agreement (S)
  Accession Number: 418238
Field Scale Evaluation of Nitrogen, Carbon, Soil Water, and Crop Growth Interactions
Specific Cooperative Agreement (S)
  Accession Number: 407947
Nitrogen Source Effects on Nitrous Oxide Emissions from Irrigated and Rainfed Production Systems
Trust (T)
  Accession Number: 416500

Publications
Nitrous Oxide Emissions from a Bermudagrass Pasture: Interseeded Winter Rye and Poultry Litter - (Peer Reviewed Journal)
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 - (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.
Carbon dioxide emissions in fallow periods of a corn-soybean rotation: eddy-covariance versus chamber methods - (Abstract)
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
Greenhouse gas emission in dependence on soil structure, and nitrogen and carbon availability - (Abstract)
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 - (Abstract)
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 - (Proceedings/Symposium)
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
Comparison of DAYCENT-Simulated and Measured Nitrous Oxide Emission from a Corn Field - (Peer Reviewed Journal)
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 - (Peer Reviewed Journal)
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 - (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.
A subsurface, closed-loop system for soil carbon dioxide and its application to the gradient efflux approach - (Peer Reviewed Journal)
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 - (Peer Reviewed Journal)
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 - (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.
CO2 and H2O Vapor Exchanges across Growing Seasons in Rainfed Corn-Soybean Systems - (Abstract)
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 - (Abstract)
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 - (Abstract)
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 - (Abstract)
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.
Field Comparison of Methods for Measuring Soil CO2 Flux - (Abstract)
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.
Field measurement results versus DAYCENT simulations in nitrous oxide emission from agricultural soil in Central Iowa - (Abstract)
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 - (Abstract)
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.
Cover Crop Effects on the Fate of Swine Manure-N Applied to Soil - (Abstract)
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.
Role of Micrometeorological Methods to Quantify Greenhouse Gas Fluxes in Agricultural Systems - (Abstract)
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 - (Abstract)
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.
Emission of the Greenhouse Gas Nitrous Oxide (N2O) from Riparian Forest Buffers, Warm-Season and Cool-Season Grass Filters and Crop Fields - (Abstract)
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.
Nitrous Oxide Emissions from Corn/soybean Systems in the Midwest - (Peer Reviewed Journal)
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 - (Other)
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 - (Peer Reviewed Journal)
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 - (Peer Reviewed Journal)
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 - (Peer Reviewed Journal)
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 - (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.
Manure Composition of Swine As Affected by Dietary Protein and Cellulose Concentration - (Peer Reviewed Journal)
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 - (Abstract)
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 - (Abstract)
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 - (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.
Tower and Aircraft Eddy Covariance Measurements of Water Vapor, Energy and Carbon Dioxide Fluxes During Smacex - (Peer Reviewed Journal)
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 - (Abstract) - (20-May-05)
Bacterial Activity, Community Structure, and Degree of Spatial Hererogeneity on the Small Scale at a Long-Term Contaminated Site - (Peer Reviewed Journal)
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 - (Peer Reviewed Journal)
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 - (Abstract)
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 - (Abstract)
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 - (Abstract) - (10-Nov-04)
Soil Co2 Flux on a Hillslope Transect in Relation to Terrain Variables, Soil Texture, Soil Om, and Residue Inputs - (Abstract)
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 - (Peer Reviewed Journal)
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 - (Peer Reviewed Journal)
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.
Beyond Fertilizer Management: in-Field Approaches for Reducing Nitrate Loads Coming from Agricultural Drainage Tiles - (Abstract)
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.
Potential Methods for Reducing Nitrate Losses in Artificially Drained Fields - (Proceedings/Symposium)
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.
Temporal Variability of Soil C02 Flux: Effect of Sampling Frequency on Cumulative Carbon Loss Estimation - (Peer Reviewed Journal)
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 - (Abstract)
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.
Stimulation of Denitrification and Nitrate Removal from Subsurface Drainage Water - (Abstract)
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)
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.
Carbon Dioxide Dynamics During a Growing Season in Midwestern Cropping Systems - (Peer Reviewed Journal)
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 - (Peer Reviewed Journal)
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 - (Peer Reviewed Journal)
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 - (Abstract) - (14-May-03)
Impact of Sampling Frequency on Soil Co2 Flux Estimation - (Abstract)
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 - (Proceedings/Symposium)
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.
Spatial and Temporal Variability of Soil Carbon - (Abstract)
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.
Automated gas sampling system for laboratory analysis of CH4 and N2O - (Peer Reviewed Journal)
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.

   
 
Last Modified: 11/21/2009
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