Thomas C Kaspar
(Tom)
Agroecosystems Management Research
Plant Physiologist
Phone: (515) 294-8873
Fax: (515) 294-8125
Room 238
1015 N. University Blvd.
NLAE
AMES, IA 500113120
Publications
(Clicking on the reprint icon
will take you to the publication reprint.)
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Drainage N loads under climate change with winter rye cover crop in a northern Mississippi River Basin corn-soybean rotation
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(Peer Reviewed Journal)
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Malone, R.W., Garbrecht, J.D., Busteed, P.R., Hatfield, J.L., Todey, D.P., Gerlitz, J., Fang, Q., Sima, M., Radke, A.G., Ma, L., Qi, Z., Wu, H., Jaynes, D.B., Kaspar, T.C. 2020. Drainage N loads under climate change with winter rye cover crop in a northern Mississippi River Basin corn-soybean rotation. Sustainability. 12(18). https://doi.org/10.3390/su12187630.
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Corn stover harvest and N losses in central Iowa
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(Peer Reviewed Journal)
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Malone, R.W., Herbstritt, S., Ma, L., Richard, T., Cibin, R., Gassman, P., Zhang, H., Karlen, D.L., Hatfield, J.L., Obrycki, J., Helmers, M., Jaynes, D.B., Kaspar, T.C., Parkin, T.B. 2019. Corn stover harvest and N losses in central Iowa. Science of the Total Environment. 663:776-792. https://doi.org/10.1016/j.scitotenv.2019.01.328.
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Effects of fungicide seed treatments and a winter cereal rye cover crop in no till on the seedling disease complex in corn
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(Peer Reviewed Journal)
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Acharya, J., Bakker, M.G., Moorman, T.B., Kaspar, T.C., Lenssen, A.W., Robertson, A.E. 2018. Effects of fungicide seed treatments and a winter cereal rye cover crop in no till on the seedling disease complex in corn. Canadian Journal of Plant Pathology. 40(4):481-497. https://doi.org/10.1080/07060661.2018.1506503.
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Rye cover crop increases earthworm populations and reduces losses of broadcast, fall-applied, fertilizers in surface runoff
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(Peer Reviewed Journal)
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Korucu, T., Shipitalo, M.J., Kaspar, T.C. 2018. Rye cover crop increases earthworm populations and reduces losses of broadcast, fall-applied, fertilizers in surface runoff. Soil & Tillage Research. 180:99-106. https://doi.org/10.1016/j.still.2018.03.004.
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Harvesting fertilized rye cover crop: simulated revenue, net energy, and drainage Nitrogen loss
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(Peer Reviewed Journal)
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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.
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Disease risks associated with cover crops in corn and soybean production
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(Proceedings)
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N loss to drain flow and N2O emissions from a corn-soybean rotation with winter rye
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(Peer Reviewed Journal)
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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.
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Fungicide seed treatments for evaluating the corn seedling disease complex following a winter rye cover crop
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(Abstract Only)
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Acharya, J., Kaspar, T.C., Robertson, A.E. 2017. Fungicide seed treatments for evaluating the corn seedling disease complex following a winter rye cover crop. In: Proceedings of American Phytopathological Society North Central Division Meeting, June 14-16, 2017, Champaign, Illinois.
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Effects of cover crop presence, cover crop species selection, and fungicide seed treatment on corn seedling growth
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(Peer Reviewed Journal)
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Schenck, L.A., Bakker, M.G., Moorman, T.B., Kaspar, T.C. 2017. Effects of cover crop presence, cover crop species selection, and fungicide seed treatment on corn seedling growth. Renewable Agriculture and Food Systems. https://doi.org/10.1017/S1742170517000345.
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Long-term research and monitoring of conservation practice effects in Iowa watersheds
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(Abstract Only)
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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.
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Winter rye as a cover crop reduces nitrate loss to subsurface drainage as simulated by HERMES
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(Peer Reviewed Journal)
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Malone, R.W., Kersebaum, K.C., Kaspar, T.C., Ma, L., Jaynes, D.B., Gillette, K.L. 2017. Winter rye as a cover crop reduces nitrate loss to subsurface drainage as simulated by HERMES. Agricultural Water Management. 184:156-169. doi: 10.1016/j.agwat.2017.01.016.
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Time interval between cover crop termination and planting influences corn seedling disease, plant growth, and yield
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(Peer Reviewed Journal)
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Acharya, J., Bakker, M.G., Moorman, T.B., Kaspar, T.C., Lenssen, A.W., Robertson, A.E. 2016. Time interval between cover crop termination and planting influences corn seedling disease, plant growth, and yield. Plant Disease. 101(4):591-600. https://doi.org/10.1094/PDIS-07-16-0975-RE.
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Impact of broadcasting a cereal rye or oat cover crop before corn and soybean harvest on nitrate
leaching
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(Abstract Only)
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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.
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Isolation of cultivation-resistant oomycetes, first detected as amplicon sequences, from roots of herbicide-terminated winter rye
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(Peer Reviewed Journal)
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Bakker, M.G., Moorman, T.B., Kaspar, T.C., Manter, D.K. 2017. Isolation of cultivation-resistant oomycetes, first detected as amplicon sequences, from roots of herbicide-terminated winter rye. Phytobiomes Journal. 1(1):24-35. doi: 10.1094/PBIOMES-10-16-0011-R.
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Rye cover crop effects on direct and indirect nitrous oxide emissions
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(Peer Reviewed Journal)
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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.
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Study of the influence of winter rye on soybean seedling and root rot diseases
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(Abstract Only)
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Araldi Da Silva, G., Kaspar, T.C., Helmers, M., Mueller, D., Leandro, L. 2016. Study of the influence of winter rye on soybean seedling and root rot diseases. In: Proceedings of American Pathological Society North Central Division Annual Meeting, June 7-9, 2016, Roseville, MN.
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Soil water improvements with the long-term use of a winter rye cover crop
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(Peer Reviewed Journal)
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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.
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The potential for cereal rye cover crops to host corn seedling pathogens
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(Peer Reviewed Journal)
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Bakker, M.G., Acharya, J., Moorman, T.B., Robertson, A., Kaspar, T.C. 2016. The potential for cereal rye cover crops to host corn seedling pathogens. Phytopathology. 106:591-601.
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Time interval between cover crop termination and planting influences corn seedling disease, plant growth, and yield
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(Peer Reviewed Journal)
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Acharya, J., Bakker, M.G., Moorman, T.B., Kaspar, T.C., Lenssen, A.W., Robertson, A.E. 2017. Time interval between cover crop termination and planting influences corn seedling disease, plant growth, and yield. Plant Disease. 101(4):591-600. doi: 10.1094/PDIS-07-16-0975-RE.
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Simulating woodchip bioreactor performance using a dual-porosity model
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(Peer Reviewed Journal)
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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.
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Effect of length of interval between cereal rye cover crop termination and corn planting on seedling root disease and corn growth
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(Abstract Only)
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Kaspar, T.C., Acharya, J., Robertson, A., Bakker, M.G., Lenssen, A., Moorman, T.B. 2015. Effect of length of interval between cereal rye cover crop termination and corn planting on seedling root disease and corn growth. In: Proceedings of ASA-CSSA-SSSA Annual Meeting, November 15-18, 2015, Minneapolis, Minnesota. Poster No. 502. Available: https://scisoc.confex.com/scisoc/2015am/webprogram/Paper92188.html.
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Cover crop options and mixes for the upper midwest
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(Abstract Only)
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Appelgate, S.R., Lenssen, A.W., Wiedenhoeft, M.H., Kaspar, T.C. 2015. Cover crop options and mixes for the upper midwest. In: Proceedings of ASA-CSSA-SSSA Annual Meeting, November 2-5, 2014, Long Beach, California. Available: https://scisoc.confex.com/scisoc/2014am/webprogram/Paper92543.html.
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Simulating long-term impacts of cover crops and climate change on crop production and environmental outcomes in the midwestern United States
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(Peer Reviewed Journal)
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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.
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Seeding date affects fall growth of winter canola (Brassica napus L. ‘Baldur’) and its performance as a winter cover crop in central Iowa
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(Peer Reviewed Journal)
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Martinez-Feria, R., Kaspar, T.C., Wiedenhoeft, M.H. 2016. Seeding date affects fall growth of winter canola (Brassica napus L. ‘Baldur’) and its performance as a winter cover crop in central Iowa. Crop, Forage & Turfgrass Management. 2(1). doi: 10.2134/cftm2015.0181.
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Cover crops in vegetable production systems
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Nair, A., Kaspar, T.C. 2015. Cover crops in vegetable production systems. Extension Publications. HORT 3026. Iowa State University Extension and Outreach.
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Winter rye cover crops as a host for corn seedling pathogens
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(Abstract Only)
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Bakker, M.G., Moorman, T.B., Kaspar, T.C., Manter, D.K. 2016. Winter rye cover crops as a host for corn seedling pathogens. American Phytopathological Society. 106:S1.2. doi: 10.1094/PHYTO-106-1-s1.1
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Effect of date of termination of a winter cereal rye cover crop (Secale cereale) on corn seedling disease
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(Abstract Only)
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Acharya, J., Bakker, M.G., Kaspar, T.C., Moorman, T.B., Lenssen, A., Robertson, A. 2016. Effect of date of termination of a winter cereal rye cover crop (Secale cereale) on corn seedling disease. American Phytopathological Society Annual Meeting. 106:S1.1.
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Soil water improvements with the long-term use of a winter rye cover crop
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(Abstract Only)
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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.
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Biomass production of 12 winter cereal cover crop cultivars and their effect on subsequent no-till corn yield
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(Peer Reviewed Journal)
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Kaspar, T.C., Bakker, M.G. 2015. Biomass production of 12 winter cereal cover crop cultivars and their effect on subsequent no-till corn yield. Journal of Soil and Water Conservation. 70(6):142A-154A. doi: 10.2489/jswc.70.6.142A.
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Winter rye cover crop effect on corn seedling pathogens
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(Abstract Only)
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Schenck, L., Kaspar, T.C., Moorman, T.B., Bakker, M.G., Loynachan, T.E. 2014. Winter rye cover crop effect on corn seedling pathogens. In: Proceedings of ASA-CSSA-SSSA Annual Meeting, November 2-11, 2014, Long Beach, California. 388-12:500. Available: https://scisoc.confex.com/scisoc/2014am/webprogram/Paper86203.html.
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Evaluation of a model framework to estimate soil and soil organic carbon redistribution by water and tillage using 137Cs in two U.S Midwest agricultural fields
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(Peer Reviewed Journal)
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Young, C.J., Liu, S., Schumacher, J.A., Schumacher, T.E., Kaspar, T.C., McCarty, G.W., Napton, D., Jaynes, D.B. 2014. Evaluation of a model framework to estimate soil and soil organic carbon redistribution by water and tillage using 137Cs in two U.S Midwest agricultural fields. Geoderma. 232:437-448. Available at: http://www.sciencedirect.com/science/journal/00167061/232.
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Rye cover crop effects on soil quality in no-till corn silage-soybean cropping systems
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(Peer Reviewed Journal)
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Moore, E.B., Kaspar, T.C., Wiedenhoeft, M.H., Cambardella, C.A. 2014. Rye cover crop effects on soil quality in no-till corn silage-soybean cropping systems. Soil Science Society of America Journal. 78(3):968-976. DOI: 10.2136/sssaj2013.09.0401.
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Cover crops in the upper midwestern United States: Potential adoption and reduction of nitrate leaching in the Mississippi River Basin
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(Peer Reviewed Journal)
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Kladivko, E.J., Kaspar, T.C., Jaynes, D.B., Malone, R.W., Singer, J., Morin, X.K., Searchinger, T. 2014. Cover crops in the upper midwestern United States: Potential adoption and reduction of nitrate leaching in the Mississippi River Basin. Journal of Soil and Water Conservation. 69(4):279-291. DOI: 10.2489/jswc.69.4.279.
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Modeling the long-term effect of winter cover crops on nitrate transport in artificially drained fields across the Midwest U.S.
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(Abstract Only)
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Cover crops in the upper midwestern United States: Simulated effect on nitrate leaching with artificial drainage
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(Peer Reviewed Journal)
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Malone, R.W., Jaynes, D.B., Kaspar, T.C., Thorp, K.R., Kladivko, E.J., Ma, L., James, D.E., Singer, J.W., Morin, X.K., Searchinger, T.D. 2014. Cover crops in the upper midwestern United States: Simulated effect on nitrate leaching with artificial drainage. Journal of Soil and Water Conservation. 69:292-305.
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Do cover crops increase or decrease nitrous oxide emissions? A meta-analysis
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(Peer Reviewed Journal)
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Basche, A.D., Miguez, F.E., Kaspar, T.C., Castellano, M.J. 2014. Do cover crops increase or decrease nitrous oxide emissions? A meta-analysis. Journal of Soil and Water Conservation. 69:471-482.
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Nitrous oxide emissions from intensively managed agroecosystems: The role of carbon inputs
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(Abstract Only)
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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.
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Rye cover crop effects on nitrous oxide emissions from a corn-soybean system
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(Abstract Only)
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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.
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Winter cover crop effect on corn seedling pathogens
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(Abstract Only)
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Schenck, L., Kaspar, T.C., Moorman, T.B., Bakker, M.G. 2013. Winter cover crop effect on corn seedling pathogens. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Nov. 3-6, 2013, Tampa, FL. Available: https://scisoc.confex.com/crops/2013am/webprogram/start.html.
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Rye cover crop effects on soil properties in no-till corn silage/soybean agroecosystems
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(Abstract Only)
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Moore, E., Kaspar, T.C., Wiedenhoeft, M., Cambardella, C.A. 2012. Rye cover crop effects on soil properties in no-till corn silage/soybean agroecosystems. American Society of Agronomy Annual Meetings [abstracts]. ASA-CSSA-SSSA Annual Meeting. Oct. 21-24, 2012, Cincinnati, OH. Available: https://www.acsmeetings.org/meetings.
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Dealing with drought: Securing nitrogen with cover crops
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Kaspar, T.C., Meisinger, J.J., Robison, D. 2012. Dealing with drought: Securing nitrogen with cover crops. World Wide Web. Available: http://www.croplife.com/webinars.
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Effectiveness of oat and rye cover crops in reducing nitrate losses in drainage water
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(Peer Reviewed Journal)
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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.
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Midwest Cover Crops Field Guide
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Fisher, B., Gerber, C., Johnson, K., Kladivko, E., Nice, G., Robison, D., Kaspar, T.C., Ackroyd, V.J., Baas, D.G., Bird, G.W., Brainard, D.C., Goldy, R.G., Harrigan, T.M., Hausbeck, M.K., Mutch, D.R., Ngouajio, M., Renner, K., Sprague, C., Taylor, E., Hoorman, J.J., Islam, R., Petrosino, J., Reeder, R., Sundermeier, A., Young, C., Brown, C., Callow, K., Celetti, M., Robinson, D., Tenuta, A., Van Eerd, L., Verhallen, A., Albrecht, K. 2012. Midwest Cover Crops Field Guide. p. 136. Available: http://www3.ag.purdue.edu/agry/dtc/Pages/CoverCropsFG.aspx.
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Effectiveness of oat and rye cover crops in reducing nitrate losses in drainage water
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(Abstract Only)
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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.
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Rye cover crop effects on soil properties in no-till corn silage/soybean agroecosystems
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(Abstract Only)
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Moore, E., Kaspar, T.C., Wiedenhoeft, M. 2011. Rye cover crop effects on soil properties in no-till corn silage/soybean agroecosystems. American Society of Agronomy Annual Meetings [abstracts]. ASA-CSSA-SSSA Annual Meeting. Oct. 16-19, 2011, San Antonio, TX. CD-ROM.
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Quantities and qualities of physical and chemical fractions of soil organic matter under a rye cover crop
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(Abstract Only)
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Olk, D.C., Cambardella, C.A., Kaspar, T.C. 2011. Quantities and qualities of physical and chemical fractions of soil organic matter under a rye cover crop. American Society of Agronomy Annual Meetings [abstracts]. ASA-CSSA-SSSA Annual Meeting. Oct. 16-19, 2011, San Antonio, TX. CD-ROM.
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Soil CO2 flux in response to wheel traffic in a no-till system
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(Peer Reviewed Journal)
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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.
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Economically optimal N rates of corn management zones delineated from soil and terrain attributes
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(Peer Reviewed Journal)
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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.
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Estimating soil organic carbon using aerial imagery and soil surveys
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(Peer Reviewed Journal)
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Gelder, B.K., Anex, R.P., Kaspar, T.C., Sauer, T.J., Karlen, D.L. 2011. Estimating soil organic carbon using aerial imagery and soil surveys. Soil Science Society of America Journal. 75:1821-1828.
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The use of cover crops to manage soil
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Kaspar, T.C., Singer, J.W. 2011. The use of cover crops to manage soil. In: Hatfield, J.L., Sauer, T.J., editors. Soil Management: Building a stable base for agriculture. Madison, WI: American Society of Agronomy and Soil Science Society of America. p. 321-337.
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Seasonal Shifts in the Biochemical Compoments of the Light Fraction, Particulate Organic Matter, and Two Humic Acid Fractions in An Iowa Soil
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(Abstract Only)
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Olk, D.C., Cambardella, C.A., Kaspar, T.C. 2010. Seasonal Shifts in the Biochemical Compoments of the Light Fraction, Particulate Organic Matter, and Two Humic Acid Fractions in An Iowa Soil. American Society of Agronomy Annual Meetings [abstracts]. ASA-CSSA-SSSA Annual Meeting. Oct. 31 - Nov. 4, 2010, Long Beach, CA. CD-ROM.
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Using cover crops and cropping systems for nitrogen management
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Dabney, S.M., Meisinger, J.J., Schomberg, H.H., Liebig, M.A., Kaspar, T.C., Delgado, J.A., Mitchell, J., Reeves, D.W. 2010. Using cover crops and cropping systems for nitrogen management. p. 230-281. In Delgado, J.A. and R.F. Follett (eds) Advances in Nitrogen Management for Water Quality, Ankeny, IA.
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Denitrification Activity, Wood Loss, and N2O Emissions Over 9 Years From a Wood Chip Bioreactor
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(Peer Reviewed Journal)
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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.
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Root characteristics of two soybean cultivars grown in fumigated fields in Iowa
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(Peer Reviewed Journal)
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Murillo-Williams, A., Kaspar, T.C., Pedersen, P. 2010. Root characteristics of two soybean cultivars grown in fumigated fields in Iowa. Crop Science. 50:2037-2045.
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Cover Crops
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(Proceedings)
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Kaspar, T.C. 2009. Cover Crops. In: Indiana Certified Crop Advisor Conference, December 15-16, 2009, Indianapolis, IN. 2009 CD-ROM.
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Cover Crop Biomass and Corn Yield Following 13 Rye, Wheat, and Triticale Cultivars Used as Winter Cover Crops
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(Abstract Only)
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Kaspar, T.C. 2009. Cover Crop Biomass and Corn Yield Following 13 Rye, Wheat, and Triticale Cultivars Used as Winter Cover Crops [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Nov. 1-5, 2009, Pittsburgh, PA.
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Cover Crop Effects on Nitrous Oxide Emission from a Manure-Treated Mollisol
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(Peer Reviewed Journal)
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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.
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Denitrification in Wood Chip Bioreactors at Different Water Flows
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(Peer Reviewed Journal)
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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.
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A Centralized Regional Database for Winter Cover Crops in Annual Cropping Systems
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(Abstract Only)
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Kaspar, T.C., Kladivko, E., Wyse, D.L., Verhallen, E.A., Sundermeier, A., Mutch, D.R., Baas, D.G. 2008. A Centralized Regional Database for Winter Cover Crops in Annual Cropping Systems [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Oct. 5-9, 2008, Houston, TX.
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Winter Cover Crop Effects on Nitrate Leaching in Subsurface Drainage as Simulated by RZWQM-DSSAT
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(Peer Reviewed Journal)
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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.
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Studies of spatial patterns of soil redistribution in two small agricultural fields
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(Abstract Only)
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Ritchie, J.C., McCarty, G.W., Kaspar, T.C., Venteris, E.R. 2009. Studies of spatial patterns of soil redistribution in two small agricultural fields [abstract]. Agronomy Society of America. 60-1.
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Small Grain Winter Cover Crops for Corn and Soybean
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Kaspar, T.C., Singer, J.W. 2008. Small Grain Winter Cover Crops for Corn and Soybean. Electronic Publication. Available: http://www.cai.iastate.edu/modules/module.aspx?modID=91.
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Rye Cover Crops in a Corn Silage-Soybean Rotation
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(Abstract Only)
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Kaspar, T.C., Singer, J.W. 2007. Rye Cover Crops in a Corn Silage-Soybean Rotation [CD-ROM]. In: ASA-CSSA-SSSA Annual Meeting Abstracts, Nov. 4-8, 2007, New Orleans, LA.
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POTENTIAL AND LIMITATIONS OF COVER CROPS, LIVING MULCHES, AND PERENNIALS TO REDUCE NUTRIENT LOSSES TO WATER SOURCES FROM AGRICULTURAL FIELDS IN THE UPPER MISSISSIPPI BASIN
-
(Proceedings)
|
Kaspar, T.C., Kladivko, E.J., Singer, J.W., Morse, S., Mutch, D. 2008. Potential and limitations of cover crops, living mulches, and perennials to reduce nutrient losses to water sources from agricultural fields in the upper Mississippi basin. In: Final Report: Gulf Hypoxia and Local Water Quality Concerns Workshop. St. Joseph, Michigan, ASABE. p.129-148.
|
 |
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.
|
 |
Managing Cover Crops in Conservation Tillage Systems
()
|
Balkcom, K.S., Schomberg, H.H., Reeves, D.W., Clark, A., Baumhardt, R.L., Collins, H.P., Delgado, J.A., Kaspar, T.C., Mitchell, J., Duiker, S. 2007. Managing Cover Crops in Conservation Tillage Systems. In: Clark, A. Managing Cover Crops Profitability. 3rd edition. Handbook Series Book 9. Sustainable Agriculture Network. p. 44-61.
|
 |
Evaluating and predicting agricultural management effects under tile-drainage using modified APSIM
-
(Peer Reviewed Journal)
|
Malone, R.W., Huth, N., Carberry, P.S., Ma, L., Kaspar, T.C., Karlen, D.L., Meade, T.G., Kanwar, R.S., Heilman, P. 2007. Evaluating and predicting agricultural management effects under tile-drainage using modified APSIM. Geoderma. 140:310-322.
|
 |
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.
|
 |
Soil Respiration in Response to Landscape Position
-
(Abstract Only)
|
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.
|
 |
Field Comparison of Methods for Measuring Soil CO2 Flux
-
(Abstract Only)
|
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.
|
 |
Cover Crop Effects on the Fate of Swine Manure-N Applied to Soil
-
(Abstract Only)
|
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.
|
 |
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.
|
 |
Field measurement results versus DAYCENT simulations in nitrous oxide emission from agricultural soil in Central Iowa
-
(Abstract Only)
|
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.
|
 |
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.
|
 |
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.
|
 |
Geomorphic Controls of Soil and Carbon Redistribution Across an Agricultural Landscape
-
(Abstract Only)
|
Ritchie, J.C., McCarty, G.W., Venteris, E.R., Kaspar, T.C. 2006. Geomorphic controls of soil and carbon redistribution across an agricultural landscape [abstract]. American Geophysical Union Fall Meeting Abstract No. B51B-309.
|
 |
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'"
()
|
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.
|
 |
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.
|
 |
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.
|
 |
COVER CROP SELECTION AND MANAGEMENT FOR MIDWEST FARMING SYSTEMS
()
|
Singer, J.W., Kaspar, T.C. 2006. Cover crop selection and management for midwest farming systems. Iowa Learning Farm Newsletter. Available: http://www.extension.iastate.edu/ilf/.
|
 |
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.
|
 |
COVER CROP SELECTION AND MANAGEMENT FOR AGRONOMIC FARMING SYSTEMS
-
(Proceedings)
|
Singer, J.W., Kaspar, T.C. 2005. Cover crop selection and management for agronomic farming systems. In: Proceedings of the Integrated Crop Management Conference, Nov. 30-Dec. 1, 2005, Ames, IA. p. 197-198.
|
 |
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.
|
 |
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.
|
 |
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.
|
 |
SMALL GRAIN COVER CROPS FOR CORN AND SOYBEAN
()
|
Singer, J.W., Kaspar, T.C., Pedersen, P. 2005. Small grain cover crops for corn and soybean. Fact Sheet:PM 1999. Meeting Abstract. Available: http://www.extension.iastate.edu/pubs/Masterlist4.html#1800
|
 |
SOIL AND SOIL ORGANIC CARBON REDISTRIBUTION IN AGRICULTURAL ECOSYSTEMS
-
(Peer Reviewed Journal)
|
Ritchie, J.C., McCarty, G.W., Venteris, E.R., Kaspar, T.C. 2007. Soil and soil organic carbon redistribution in agricultural ecosystems. Geomorphology. 89(1-2):163-171.
|
 |
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 Only)
|
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 Only)
|
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
|
 |
SOIL AND SOIL ORGANIC CARBON REDISTRIBUTION IN AGRICULTURAL ECOSYSTEMS
-
(Abstract Only)
|
Ritchie, J., McCarty, G., Venteris, E., Kasper, T. 2005. Soil and soil organic carbon redistribution in agricultural ecosystems [abstract]. European Geophysical Research Abstracts. 7:00571.
|
 |
USING SOIL REDISTRIBUTION TO UNDERSTAND SOIL ORGANIC CARBON REDISTRIBUTION AND BUDGETS
-
(Peer Reviewed Journal)
|
Ritchie, J.C., McCarty, G.W. Venteris, E.R., Kaspar, T.C. 2005. Using sediment budgets to understand soil organic carbon redistribution and budgets. International Association of Hydrological Sciences Publication. 292:3-8.
|
 |
SOIL CO2 FLUX ON A HILLSLOPE TRANSECT IN RELATION TO TERRAIN VARIABLES, SOIL TEXTURE, SOIL OM, AND RESIDUE INPUTS
-
(Abstract Only)
|
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.
|
 |
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.
|
 |
ULTRASONIC SENSING FOR CORN PLANT CANOPY CHARACTERIZATION
-
(Proceedings)
|
Abd Aziz, S., Stewart, B.L., Birrell, S.J., Kaspar, T.C., Shrestha, D.S. 2004. Ultrasonic sensing for corn plant canopy characterization. ASAE Annual International Meeting. St. Joseph, MI. Paper No. 04-041120.
|
 |
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.
|
 |
ASSESSING SOIL ORGANIC CARBON REDISTRIBUTION WITH FALLOUT CESIUM-137
-
(Proceedings)
|
Ritchie, J.C., McCarty, G.W., Venteris, E.R., Kaspar, T.C., Owens, L.B., Nearing, M. 2004. Assessing soil organic carbon redistribution with fallout 137Cesium. In: Proceedings of Conserving Soil and Waterfor Society: Sharing Solutions, ISCO 2004-13th International Soil Conservation Organization Conference, July 4-9, 2004, Brisbane, Australia. 613:4. 2004 CDROM.
|
 |
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.
|
 |
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.
|
 |
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.
|
 |
ASSESSING SOIL AND SOIL CARBON REDISTRIBUTION PATTERNS USING RADIOACTIVE FALLOUT 137 CESIUM
-
(Abstract Only)
|
Ritchie, J.C., McCarty, G.W., Venteris, E.R., Owens, L.B., Kaspar, T.C., Nearing, M.A. 2003. Assessing soil and soil carbon redistribution patterns using radioactive fallout 137 Cesium [abstract]. Abstracts of 2003 Global Climate Terrestrial Ecology Meeting in Tucson, Arizona. p. 28.
|
 |
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.
|
 |
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.
|
 |
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.
|
 |
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.
|
 |
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.
|
 |
DENITRIFICATION-BASED REMOVAL OF NITRATE FROM SUBSURFACE DRAINAGE WATER
-
(Abstract Only)
|
|
 |
IMPACT OF SAMPLING FREQUENCY ON SOIL CO2 FLUX ESTIMATION
-
(Abstract Only)
|
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.
|
 |
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.
|
 |
PLANT HEIGHT ESTIMATION USING TWO SENSING SYSTEMS
-
(Proceedings)
|
SHRESTHA, D.S., STEWARD, B.L., BIRRELL, S.J., KASPAR, T.C. PLANT HEIGHT ESTIMATION USING TWO SENSING SYSTEMS. ASAE ANNUAL INTERNATIONAL MEETING. 2002. CD-ROM. ST. JOSEPH, MI.
|
 |
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.
|
 |
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.
|
 |
DETERMINATION OF EARLY STAGE CORN PLANT HEIGHT USING STEREO VISION
-
(Proceedings)
|
SHRESTHA, D.S., STEWARD, B.L., KASPAR, T.C. DETERMINATION OF EARLY STAGE CORN PLANT HEIGHT USING STEREO VISION. INTERNATIONAL CONFERENCE ON PRECISION AGRICULTURE ABSTRACTS & PROCEEDINGS. 2002. CD-ROM. MADISON, WI.
|
 |
OAT PLANT EFFECTS ON NET NITROGEN MINERALIZATION
-
(Peer Reviewed Journal)
|
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.
|
 |
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.
|
 |
NITRATE LEACHING AS INFLUENCED BY COVER CROPS IN LARGE SOIL MONOLITHS
-
(Peer Reviewed Journal)
|
LOGSDON, S.D., KASPAR, T.C., MEEK, D.W., PRUEGER, J.H. NITRATE LEACHING AS INFLUENCED BY COVER CROPS IN LARGE SOIL MONOLITHS. AGRONOMY JOURNAL. 2002. V. 94(4). P. 807-814.
|
 |
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.
|
 |
SMALL GRAIN COVER CROPS FOR IOWA
-
(Proceedings)
|
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
-
(Abstract Only)
|
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
-
(Abstract Only)
|
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.
|
 |
NITROGEN MANAGEMENT STRATEGIES TO REDUCE NITRATE LEACHING IN TILE-DRAINED MIDWESTERN SOILS
()
|
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.
|
 |
CROP ROOT RESPONSE TO SOIL TEMPERATURE IN TEMPERATE REGIONS
()
|
|
 |
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.
|
 |
NITRATE LEACHING AS INFLUENCED BY COVER CROPS IN LARGE SOIL MONOLITHS
-
(Abstract Only)
|
Logsdon, S.D., Kaspar, T.C., Prueger, J.H., Meek, D.W., Simmons, G.T., Hart, T.T. 2000. Nitrate leaching as influenced by cover crops in large soil monoliths. Soil Science Society of America Annual Meeting. CD-ROM. Madison, Wisconsin.
|
 |
EFFECT OF COARSE TEXTURED MATERIALS, "A" HORIZON DEPTH, CARBONATE DEPTH, PH, AND SOIL TEXTURE ON CORN YIELD VARIABILITY
-
(Abstract Only)
|
|
 |
USING THE WEIGHT-LOSS-ON-IGNITION METHOD TO MEASURE SPATIAL VARIABILITY OF SOIL CARBON
-
(Abstract Only)
|
|
 |
SMALL GRAIN COVER CROPS AND WHEEL TRAFFIC EFFECTS ON INFILTRATION, RUNOFF, AND EROSION
-
(Peer Reviewed Journal)
|
|
 |
ESTIMATING CORN YIELD USING SIX YEARS OF YIELD DATA AND TERRAIN ATTRIBUTES
-
(Proceedings)
|
|
 |
YIELD CERTAINTY WITH PLOTS OR FIELDS
-
(Abstract Only)
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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.
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DECOMPOSITION OF BURIED ROOT RESIDUES IN THE FIELD
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(Abstract Only)
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OAT AND RYE ROOT DECOMPOSITION EFFECTS ON NITROGEN MINERALIZATION
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(Peer Reviewed Journal)
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APPLICATION PLACEMENT TECHNIQUES TO INCREASE NITROGEN USE EFFICIENCY AND REDUCE NITRATE LEACHING
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(Abstract Only)
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MODEL-BASED TECHNIQUE TO DETERMINE VARIABLE RATE NITROGEN FOR CORN
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(Peer Reviewed Journal)
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Paz, J.O., Batchelor, W.D., Babcock, B.A., Colvin, T.S., Logsdon, S.D., Kaspar, T.C., Karlen, D.L. 1999. Model-based technique to determine variable rate nitrogen for corn. Agricultural Systems. 61:69-75.
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NEW NITROGEN APPLICATION/PLACEMENT TECHNIQUES TO INCREASE USE-EFFICIENCY AND REDUCE NITRATE LEACHING
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(Proceedings)
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OAT AND RYE ROOT DECOMPOSITION EFFECTS ON CARBON AND NITROGEN CYCLING IN A CONTROLLED ENVIRONMENT
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(Abstract Only)
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COVER CROP AND WHEEL TRACK EFFECTS ON INFILTRATION, RUNOFF, AND EROSION
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(Abstract Only)
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PLANT EFFECTS ON NITROGEN MINERALIZATION
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(Abstract Only)
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ANALYSIS OF WATER STRESS EFFECTS CAUSING SPATIAL YIELD VARIABILITY IN SOYBEANS
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(Peer Reviewed Journal)
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MODEL-BASED TECHNIQUE TO DETERMINE VARIABLE RATE NITROGEN FOR CORN
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(Abstract Only)
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OAT AND RYE OVERSEEDED INTO SOYBEAN AS FALL COVER CROPS IN THE UPPER MIDWEST
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(Peer Reviewed Journal)
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DEPTH INCREMENTAL SOIL PROPERTIES UNDER NO-TILL OR CHISEL MANAGEMENT
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(Peer Reviewed Journal)
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LOCALIZED SOIL MANAGEMENT IN FERTILIZER INJECTION ZONE TO REDUCE NITRATE LEACHING
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(Peer Reviewed Journal)
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EVALUATION OF LOCALIZED COMPACTION AND DOMING TO REDUCE ANION LEACHING LOSSES USING LYSIMETERS
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(Peer Reviewed Journal)
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IMPROVING STAND ESTABLISHMENT IN NO TILL WITH RESIDUE-CLEARING PLANTER ATTACHMENTS
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(Peer Reviewed Journal)
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INFLUENCE OF CORN ROOTS ON WATER AND CHEMICAL MOVEMENT THROUGH UNDISTURBED SOIL COLUMNS
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(Abstract Only)
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CORN YIELD RESPONSE TO FERTILIZER FROM AN APPLICATOR DESIGNED TO REDUCE NITRATE LEACHING
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(Abstract Only)
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IMPROVED FERTILIZER APPLICATOR TO REDUCE NITRATE FERTILIZER LEACHING FROM CROP LANDS
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(Proceedings)
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CALIBRATION OF A CROP GROWTH MODEL TO PREDICT SPATIAL YIELD VARIABILITY
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(Abstract Only)
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ECONOMIC EVALUATION OF CROP MANAGEMENT SYSTEMS FOR SUSTAINABLE AGRICULTURE
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(Abstract Only)
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OATS OVERSEEDED INTO SOYBEANS AS A FALL COVER CROP
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(Abstract Only)
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ROOTEDGE: SOFTWARE FOR MEASURING ROOT LENGTH FROM DESKTOP SCANNER IMAGES
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(Peer Reviewed Journal)
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OATS OVERSEEDED INTO SOYBEAN AS A FALL COVER CROP
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(Abstract Only)
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TESTING A NITROGEN FERTILIZER APPLICATOR DESIGNED TO REDUCE LEACHING LOSSES
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(Peer Reviewed Journal)
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OATS OVERSEEDED INTO SOYBEAN AS A FALL COVER CROP
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(Abstract Only)
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CORN PLANTER ATTACHMENT EFFECTS ON SOIL AND RESIDUE
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(Proceedings)
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USING SMALL GRAIN COVER CROPS TO MANAGE NITROGEN IN THE MIDWEST
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(Abstract Only)
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TILLAGE AND WHEEL TRAFFIC EFFECTS ON CORN GROWTH AND YIELD
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(Abstract Only)
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IMPROVED FERTILIZER BANDING TECHNIQUE TO REDUCE NITRATE-N LEACHING: LYSIMETER EVALUATION
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(Abstract Only)
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OATS OVERSEEDED INTO SOYBEANS AS A FALL COVER CROP
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(Abstract Only)
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CONVERSION TO NO-TILL INFLUENCE ON INCREMENTAL SOIL PROPERTIES
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(Abstract Only)
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MAIZE NODAL ROOT RESPONSE TO TIME OF SOIL RIDGING
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(Peer Reviewed Journal)
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APPLICATIONS TO ROOT RESEARCH METHODOLOGIES BY MEMBERS OF THE CSREES REGIONAL COMMITTEE NCR-60
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(Abstract Only)
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SMEARED SOIL SURFACE EVALUATION BY FIBER OPTIC SENSOR AND ROOT PENETRATION
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(Proceedings)
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SOIL PROPERTY CONTRIBUTIONS TO YIELD VARIATION PATTERNS
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(Abstract Only)
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SOIL PROPERTY CONTRIBUTIONS TO YIELD VARIATION PATTERNS
-
(Proceedings)
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TILLAGE AND WHEEL TRAFFIC EFFECTS ON CORN YIELD AND ROOT GROWTH
()
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SEED-ROW RESIDUE MANAGEMENT FOR CORN PRODUCTION IN THE NORTHERN U.S. CORN BELT
()
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RUNOFF, EROSION, AND SOIL QUALITY CHARACTERISTICS OF A FORMER CRP SITE IN SOUTHWESTERN IOWA
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(Peer Reviewed Journal)
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RESIDUE AND COMPACTION MANAGEMENT IN NO-TILL
()
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SOLUTE LEACHING AND CROP WATER BALANCE IN LARGE UNDISTURBED SOIL MONOLITHS
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(Abstract Only)
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SOIL PHYSICAL PROPERTIES IN NO-TILL WITH AND WITHOUT SWEEP CULTIVATION FOR WEED CONTROL
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(Abstract Only)
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INTERMEDIATE-SCALE SOLUTE LEACHING IN LARGE UNDISTURBED SOIL MONOLITHS
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(Proceedings)
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LOCALIZED COMPACTION AND DOMING TO REDUCE NITRATE N LEACHING: EXPERIMENTALAND NUMERICAL
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(Abstract Only)
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INTERACTIONS OF CROP RESIDUE WITH SOIL AND CLIMATE
()
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ACCURATE PERIMETER AND LENGTH MEASUREMENT USING AN EDGE CHORD ALGORITHM
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(Peer Reviewed Journal)
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TRAFFIC PATTERN AND TILLAGE SYSTEM EFFECTS ON CORN ROOT AND SHOOT GROWTH
-
(Peer Reviewed Journal)
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EFFECTS OF COULTER TREATMENTS ON SEED-FURROW SMEARING AND EARLY CROP RESPONSE
-
(Abstract Only)
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EFFECTS OF COULTER TREATMENTS ON SEED FURROW SMEARING AND EARLY CROP RESPONSE
-
(Abstract Only)
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LOCALIZED COMPACTION AND DOMING TO INCREASE N-USE EFFICIENCY AND REDUCE LEACHING
-
(Proceedings)
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