Search Results - "Doran, J. W."

Aggregation and soil organic matter accumulation in cultivated and native grassland soils by Six, J. (Colorado State Univ., Fort Collins, CO.), Elliott, E.T, Paustian, K, Doran, J.W

“…Tillage intensity affects soil structure and the loss of soil organic C and N. We hypothesized that no-tillage (NT) and conventional tillage (CT)…”
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Simplified Method for Soil Particle‐Size Determination to Accompany Soil‐Quality Analyses by Kettler, T.A., Doran, J.W., Gilbert, T.L.

“…Soil textural analysis is a key component of any minimum data set used for assessing soil quality and sustainability of agricultural‐management practices…”
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Soil Electrical Conductivity and Water Content Affect Nitrous Oxide and Carbon Dioxide Emissions in Intensively Managed Soils by Adviento-Borbe, M.A.A, Doran, J.W, Drijber, R.A, Dobermann, A

“…Accumulation of soluble salts resulting from fertilizer N may affect microbial production of N2O and CO2 in soils. This study was conducted to determine the…”
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Soil quality: a concept, definition, and framework for evaluation by Karlen, D.L, Mausbach, M.J, Doran, J.W, Cline, R.G, Harris, R.F, Schuman, G.E

“…This essay summarizes deliberation by the Soil Science Society of America (SSSA) Ad Hoc Committee on Soil Quality (S-581) and was written to spur discussion…”
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Changes in soil microbial community structure with tillage under long-term wheat-fallow management by Drijber, R.A., Doran, J.W., Parkhurst, A.M., Lyon, D.J.

“…Fatty acid methyl esters (FAMEs) were used to ‘fingerprint’ soil microbial communities that evolved during 25 years of wheat-fallow cropping following native…”
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Crop sequence and nitrogen fertilization effects on soil properties in the Western Corn belt by LIEBIG, M. A, VARVEL, G. E, DORAN, J. W, WIENHOLD, B. J

“…Understanding long-term managment effects on soil properties is necessary to determine the relative sustainability of cropping systems. Soil physical,…”
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Electrical conductivity monitoring of soil condition and available N with animal manure and a cover crop by Eigenberg, R.A, Doran, J.W, Nienaber, J.A, Ferguson, R.B, Woodbury, B.L

“…Development of sustainable agricultural management systems will depend, in part, on the ability to better use renewable resources, such as animal manure, and…”
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Impact of Organic Production Practices on Soil Quality Indicators by Liebig, M. A., Doran, J. W.

“…The impact of organic production practices on soil quality indicators, for selected farms in Nebraska and North Dakota, were evaluated to better understand…”
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Denitrification and the dinitrogen/nitrous oxide ratio as affected by soil water, available carbon, and nitrate by Weier, K.L, Doran, J.W, Power, J.F, Walters, D.T

“…Biological denitrification is affected by many environmental factors that control the amount of N, and N.0 entering the atmosphere. This study was conducted to…”
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Soil Quality Assessment after Weed‐Control Tillage in a No‐Till Wheat–Fallow Cropping System by Kettler, T. A., Lyon, D. J., Doran, J. W., Powers, W. L., Stroup, W. W.

“…Adoption of reduced‐tillage fallow systems in the western USA is limited by winter annual grass weeds such as downy brome (Bromus tectorum L.). Moldboard…”
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Soil microbial activity, nitrogen cycling, and long-term changes in organic carbon pools as related to fallow tillage management by Doran, J.W, Elliott, E.T, Paustian, K

“…Two experiments were established in 1969 and 1970 near Sidney, NE, to determine the effect of moldboard plow (plow), sub-tillage (sub-till), and no-tillage…”
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Cropping system effects on soil quality in the Great Plains: Synthesis from a regional project by Wienhold, B.J., Pikul, J.L., Liebig, M.A., Mikha, M.M., Varvel, G.E., Doran, J.W., Andrews, S.S.

“…Soils perform a number of essential functions affecting management goals. Soil functions were assessed by measuring physical, chemical, and biological…”
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Soil health and global sustainability: translating science into practice by Doran, John W.

“…Interest in the quality and health of soil has been stimulated by recent awareness that soil is vital to both production of food and fiber and global…”
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Steady-state aerobic microbial activity as a function of soil water content by Skopp, J. (Univ. of Nebraska, Lincoln, NE), Jawson, M.D, Doran, J.W

“…Soil physical properties often regulate aeration-dependent microbial activities important to nutrient cycling, soil fertility and environmental quality…”
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Maize plant contributions to root zone available carbon and microbial transformations of nitrogen by Qian, Jin H., Doran, John W., Walters, Daniel T.

“…Root-derived C influences soil microbial activities that regulate N transformations and cycling in soil. The change in 13C abundance of soil microbial biomass…”
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Effect of water-filled pore space on carbon dioxide and nitrous oxide production in tilled and nontilled soils [Maize; Illinois; Kentucky; Minnesota; Nebraska] by Linn, D.M, Doran, J.W

“…The percentage of soil pore space filled with water (percent water‐filled pores, % WFP), as determined by water content and total porosity, appears to be…”
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Residual effects of crop residues on grain production and selected soil properties by Power, J.F. (USDA, ARS, Univ. of Nebraska, Lincoln, NE.), Koerner, P.T, Doran, J.W, Wilhelm, W.W

“…Returning crop residue improves water conservation and storage, nutrient availability, and crop yields. We have little knowledge, however, of the residual…”
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Greenhouse Gas Fluxes following Tillage and Wetting in a Wheat‐Fallow Cropping System by Kessavalou, Anabayan, Doran, John W., Mosier, Arvin R., Drijber, Rhae A.

“…Little is known about the relative contributions of episodic tillage and precipitation events to annual greenhouse gas emissions from soil. Consequently, we…”
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Crop residue type and placement effects on denitrification and mineralization by Aulakh, M. S., Walters, D. T., Doran, J. W., Francis, D. D., Mosier, A. R.

“…Nutrient release from legume and cereal crop residue is important to N cycling and the success of conservation and sustainable farming systems. Residue type,…”
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Portable probes to measure electrical conductivity and soil quality in the field by Arnold, S.L, Doran, J.W, Schepers, J, Wienhold, B, Ginting, D, Amos, B, Gomes, S

“…Soil electrical conductivity (EC) is a useful indicator in managing agricultural systems, but tools for convenient and inexpensive measurements in the field…”
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