Search Results - "Larson, W.E"

Changes in microrelief and their effects on infiltration and erosion during simulated rainfall by Magunda, M.K., Larson, W.E., Linden, D.R., Nater, E.A.

“…The erosivity of soils under a given rainfall energy appears to vary greatly among soil orders, probably reflecting differences in clay composition and organic…”
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The threat of soil erosion to long-term crop production [USA] by Larson, W.E, Pierce, F.J, Dowdy, R.H

“…National increases in row crops at the expense of hay and pasture crops, particularly on steeper slopes, have made the control of erosion a difficult prospect…”
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Influence of corn residue on compression and compaction behavior of soils by Gupta, S. C., Schneider, E.C., Larson, W.E., Hadas, A.

“…Crop residues have low densities and are somewhat elastic in nature. The presence of these residues in the soil or at the soil surface might reduce the…”
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Estimating critical stress in unsaturated [agricultural] soils from changes in pore water pressure during confined compression by Larson, W.E, Gupta, S.C

“…The objective of this study was to describe the changes in pore water pressure as a function of initial soil water content and applied stress. A hypothesis is…”
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NCSOIL, a model of nitrogen and carbon transformations in soil: description, calibration, and behavior by Molina, J.A.E, Clapp, C.E, Shaffer, M.J, Chichester, F.W, Larson, W.E

“…NCSOIL is a submodel of a larger program NTRM (nitrogen‐tillage‐residue management). NCSOIL computes short‐term dynamics of carbon and nitrogen organics,…”
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Soil physical constraints to establishment of mungbeans ( Vigna radiata L. Wilczek) in paddy rice ( Oryza sativa L.) soils by Cook, S.M.F., Gupta, S.C., Woodhead, T., Larson, W.E.

“…In several rice producing countries, production of upland crops, such as mungbeans ( Vigna radiata L. Wilczek), is an important means to save foreign exchange…”
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Compression of agricultural soils from eight soil orders by Larson, W. E., Gupta, S. C., Useche, R. A.

“…Compression curves (bulk density vs. log applied stress) determined on 36 world agricultural soil samples at a given water content were linear over the range…”
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Soil aggregate longevity as determined by the incorporation of ceramic spheres by Staricka, J.A. (USDA-ARS North Central Soil Conservation Research Lab., Morris, MN), Allmaras, R.R, Nelson, W.W, Larson, W.E

“…Soil aggregates influence the biological environment of the tilled layer but their rate of formation and breakdown is unknown. We estimated the life expectancy…”
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Potentially mineralizable nitrogen in soil: the simple exponential model does not apply for the first 12 weeks of incubation by Molina, J.A.E, Clapp, C.E, Larson, W.E

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Physical properties of a Typic Haplaquoll under conventional and no-tillage by Culley, J.L.B, Larson, W.E, Randall, G.W

“…Conservation tillage, particularly no‐till (NT), for corn (Zea mays L.) production on poorly drained soils in the U.S. Corn Belt often produces lower yields…”
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Tillage and surface residue effects on soil upper boundary temperatures [Zea mays] by Gupta, S. C., Larson, W. E., Linden, D. R.

“…The effects of tillage‐surface residue interactions on soil upper boundary temperatures are described. Regression curves are developed between the maximum and…”
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Susceptibility to compression of a clay loam Haplaquoll by Culley, J.L.B, Larson, W.E

“…The objective of this study was to determine the compressibility of a poorly drained clay loam soil cropped to corn (Zea mays L.) with moldboard plowing as…”
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Predicting soil temperature and soil heat flux under different tillage-surface residue conditions [Mulch, Zea mays] by Gupta, S.C, Larson, W.E, Allmaras, R.R

“…Model descriptions for soil temperature utilizing readily available information are needed to project management effects of tillage. In many cases these model…”
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Predicting temperatures of bare and residue covered soils with and without a corn crop [Soil temperature models] by Gupta, S.C, Radke, J.K, Larson, W.E

“…Models are described to predict the upper boundary and root zone temperatures for bare and various residue‐covered soils with and without a growing corn (Zea…”
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Hydraulic and thermal properties of a sandy soil as influenced by incorporation of sewage sludge by Gupta, S. C., Dowdy, R. H., Larson, W. E.

“…Soil‐water retention was increased by incorporation of sewage sludge into a sandy soil. Most of this increase resulted from water adsorbed by organic matter…”
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Rebound of five one-dimensionally compressed unsaturated granular soils by Stone, J. A., Larson, W. E.

“…Rebound (decrease in bulk density after removal of mechanical stress) of five agricultural soils from four soil orders was measured at stresses of 1,000, 5,000…”
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Soil-water regimes of a Typic Haplaquoll under conventional and no-tillage by Culley, J.L.B, Larson, W.E, Allmaras, R.R, Shaffer, M.J

“…Computer simulation models are needed to help describe the dynamic nature of soil‐water regimes. A simple water budget and an integrated soil‐plant‐atmosphere…”
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Soil strength and aeration effects on [pea] root elongation by Voorhees W.B, Farrell D.A, Larson W.E

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A model to predict tillage effects on soil temperature by Cruse, R. M., Linden, D. R., Radke, J. K., Larson, W. E., Larntz, K.

“…A simulation model was developed to predict tillage effects on average daily soil temperature at the 5‐cm depth. A two‐step procedure was utilized: (i) an…”
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Effect of liquid wastewater sludge application on crop yield and water quality by Duncomb, D. R., Larson, W. E., Clapp, C. E., Dowdy, R. H., Linden, D. R., Johnson, W. K.

“…For 6 years (1974 to 1979, inclusive) liquid digested wastewater sludge was applied to a 16-ha terraced watershed. During that period, 73.9 metric tons/ha (4…”
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