Search Results - "Parkin, T. B"

Effectiveness of oat and rye cover crops in reducing nitrate losses in drainage water by Kaspar, T.C., Jaynes, D.B., Parkin, T.B., Moorman, T.B., Singer, J.W.

“…► Nitrate losses in agricultural drainage water impact surface water quality in the USA. ► Both a fall oat cover crop and a rye winter cover crop reduced…”
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Influence of nitrapyrin on N₂O losses from soil receiving fall-applied anhydrous ammonia by Parkin, T.B, Hatfield, J.L

“…Fertilizer application in crop production agriculture has been identified as a major source of the greenhouse gas nitrous oxide. Thus, management strategies…”
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Impact of nitrogen fertilization and cropping system on carbon sequestration in midwestern Mollisols by Russell, A.E, Laird, D.A, Parkin, T.B, Mallarino, A.P

“…Growing interest in the potential for agricultural soils to provide a sink for atmospheric C has prompted studies of effects of management on soil organic…”
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Cover crop effects on the fate of N following soil application of swine manure by Parkin, T. B, Kaspar, T. C, Singer, J. W

“…Cereal grain cover crops increase surface cover, anchor corn (Zea mays L.) and soybean [Glycine max (L.) Merr.] residues, increase infiltration, reduce both…”
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Trace gas fluxes from a Northern mixed-grass prairie interseeded with Alfalfa by Ingram, L. J, Schuman, G. E, Parkin, T. B, Mortenson, M

“…AIMS: That legumes improve soil fertility is well established, however the extent that N fixed by legumes may increase trace gas emissions is poorly…”
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Field-scale variability of soil properties in central Iowa soils by Cambardella, C.A. (USDA-ARS, National Soil Tilth Lab., Ames, IA.), Moorman, T.B, Novak, J.M, Parkin, T.B, Karlen, D.L, Turco, R.F, Konopka, A.E

“…Spatial distributions of soil properties at the field and watershed scale may affect yield potential, hydrologic responses, and transport of herbicides and…”
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Subsurface, Closed-Loop System for Soil Carbon Dioxide and Its Application to the Gradient Efflux Approach by De Sutter, T.M, Sauer, T.J, Parkin, T.B, Heitman, J.L

“…Carbon dioxide concentrations in the soil can vary both temporally and spatially. Methodology was developed to semicontinuously measure subsurface…”
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Methane Oxidation and Production Activity in Soils from Natural and Agricultural Ecosystems by Chan, A.S.K., Parkin, T.B.

“…ABSTRACT Methane (CH4) flux from soil to the atmosphere is the result of two microbial processes, methanogenesis and CH4 oxidation. Land use may have a…”
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Manure composition of swine as affected by dietary protein and cellulose concentrations by Kerr, B.J, Ziemer, C.J, Trabue, S.L, Crouse, J.D, Parkin, T.B

“…An experiment was conducted to investigate the effects of reducing dietary CP and increasing dietary cellulose concentrations on manure DM, C, N, S, VFA,…”
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Calculating the detection limits of chamber-based soil greenhouse gas flux measurements by Parkin, T.B, Venterea, R.T, Hargreaves, S.K

“…Renewed interest in quantifying greenhouse gas emissions from soil has led to an increase in the application of chamber-based flux measurement techniques…”
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Tower and Aircraft Eddy Covariance Measurements of Water Vapor, Energy, and Carbon Dioxide Fluxes during SMACEX by Prueger, J. H., Hatfield, J. L., Kustas, W. P., Hipps, L. E., MacPherson, J. I., Neale, C. M. U., Eichinger, W. E., Cooper, D. I., Parkin, T. B.

“…A network of eddy covariance (EC) and micrometeorological flux (METFLUX) stations over corn (Zea maysL.) and soybean [Glycine max(L.) Merr.] canopies was…”
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Effect of Land Use on Methane Flux from Soil by Chan, A.S.K., Parkin, T.B.

“…ABSTRACT The precise effects of natural and disturbed terrestrial systems on the atmospheric CH4 pool are uncertain. This study was conducted to quantify and…”
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Examining Changes in Soil Organic Carbon with Oat and Rye Cover Crops Using Terrain Covariates by Kaspar, T.C, Parkin, T.B, Jaynes, D.B, Cambardella, C.A, Meek, D.W, Jung, Y.S

“…Winter cover crops have the potential to increase soil organic C in the corn (Zea mays L.)-soybean [Glycine max (L.) Merr.] rotation in the upper Midwest…”
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N loss to drain flow and N2O emissions from a corn-soybean rotation with winter rye by Gillette, K., 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.

“…•Root Zone Water Quality Model tested for simulated nitrate loss to subsurface drainage•Root Zone Water Quality Model tested for simulated nitrous oxide…”
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Microbial nitrogen transformations in earthworm burrows by Parkin, Timothy B., Berry, Edwin C.

“…Earthworms play an active role in soil nitrogen cycling. Past research has shown that earthworm castings are enriched in NO 3 − and NH 4 + and show a high…”
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Rye Cover Crop and Gamagrass Strip Effects on NO3 Concentration and Load in Tile Drainage by Kaspar, T.C., Jaynes, D.B., Parkin, T.B., Moorman, T.B.

“…A significant portion of the NO3 from agricultural fields that contaminates surface waters in the Midwest Corn Belt is transported to streams or rivers by…”
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Gaseous Nitrogen Emissions from Anaerobic Swine Lagoons: Ammonia, Nitrous Oxide, and Dinitrogen Gas by Harper, Lowry A., Sharpe, Ron R., Parkin, Tim B.

“…Seventy‐five percent of swine (Sus scrofa) production systems in North America use anaerobic or liquid‐slurry systems for waste holding or disposal. Accurate…”
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Evaluation of potential inhibitors of methanogenesis and methane oxidation in a landfill cover soil by Chan, A.S.K., Parkin, T.B.

“…Biological methane (CH 4) production is an anaerobic process, while CH 4 consumption occurs predominantly under aerobic conditions; however, both processes can…”
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Water Quality in Walnut Creek Watershed: Nitrate‐Nitrogen in Soils, Subsurface Drainage Water, and Shallow Groundwater by Cambardella, C. A., Moorman, T. B., Jaynes, D. B., Hatfield, J. L., Parkin, T. B., Simpkins, W. W., Karlen, D. L.

“…Nonpoint source contamination of surface and groundwater resources with nitrate‐N (NO3‐N) has been linked to agriculture across the midwestern USA. A 4‐yr…”
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Corn stover harvest N and energy budgets in central Iowa by Malone, R.W., Herbstritt, S., Ma, L., Richard, T.L., Cibin, R., Gassman, P.W., Zhang, H.H., Karlen, D.L., Hatfield, J.L., Obrycki, J.F., Helmers, M.J., Jaynes, D.B., Kaspar, T.C., Parkin, T.B., Fang, Q.X.

“…Harvesting corn stover removes N from the fields, but its effect on subsurface drainage and other N losses is uncertain. We used the Root Zone Water Quality…”
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