Roger E. Smith
United States Department of Agriculture
Agricultural Research Service,
Water Management Research Unit
CO 80522 Fort Collins
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Hydrology Paper 3, Colorado State University, Fort Collins, Colorado, pp. 22-27.
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Foster, G.R., 1982.Modeling the erosion process, chapter 8 Hydrologic Modeling of Small Watersheds, Haan, C.T. et al., pp. 297-388.
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Foster, G.R., Johnson, C.B., Moldenhauer, W.C., 1982.Hydraulics of failure of unanchored cornstalk and wheat straw mulches for erosion control Transact. of Americ. Soc. of Agrig. Eng., 940-947.
Foster, G.R., Smith, R.E., Knisel, W.G., Hakonson, T.E., 1983.Modeling the effectiveness of on-site sediment controlAmerican Soc.of Agricultural Engineers, 15pp.
Foster, G.R., Young, R.A., Niebling, W.H., 1985.Sediment composition for nonpoint source pollution analysis Transact. of Americ. Soc. of. Agr. Eng., 133-139.
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Parton, W.J., Schimel, D.S., Cole, C.D., Ojima, D.S., 1987.Analysis of factors controlling soil organic matter levels in great plains grasslands Soil Science Society of America Journal, 1173-1179.
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Pinck, L.A., Allison, F.E., Sherman, M.S., 1950.Maintenance of soil organic matter: II. Losses of carbon and nitrogen from young and matureplant material during decomposition in soil Soil Science 69, 391-401.
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Richardson, C.W., Wright, D.A., 1984.A model for generating daily weather variables Department of Agriculture, pp. 83pp.
Ritchie, J.T., 1972.A model for predicting evaporation from a row crop with incomplete cover Water Resour. Res. 8(5) (1972), 1204-1213.
Schrieber, J.D., 1990.Estimating soluble phosphorus from green crops and their redidues in agricultural runoff Small Watershed Model (SWAM), DeCoursey, D.G., pp. 77-95.
Smith, R.E., 1981.Rational models of infiltration hydrodynamics Water Resources Publications, Singh, V.P., Littleton, pp. 107-126.
Smith, R.E., 1990.Analysis of infiltration into a two-layer soil profile Soil Science Society of America Journal, 1219-1227.
Smith, R., and V. Ferreira. 1992. Opus: an integrated simulation model for transport of non-pointsource pollutants at the field scale. USDA-ARS publication ARS-98, Ft.Collins, Colorado.
Smith, R.E., 1983.Approximate soil water movement by kinematic characteristics Soil Science Society of America Journal, 3-8.
U.S. Department of Agriculture, Soil Conservation Service, 1972.Estimation of direct runoff from storm rainfall, chapter 10 National Engineering Handbook, 10.1-10.24.
U.S. Department of Agriculture, 1980.A field scale model for chemicals, runoff, and erosion from agricultural management systems Conservation Report No 26, 640pp.
van Genuchten, M.T., 1980.A closed form equation for predicting the hydraulic conductivity of unsaturated soils. Soil Science Society of America Journal 44, 892-898.
Walker, A., 1974.A simulation model for prediction of herbicide persistence Journal of Environmental Quality, 396-401.
Williams, J.R., 1975.Sediment yield prediction with universal equation using runoff energy factorAgricultural Research Service ARS-S-40, U.S. Department of Agriculture, pp. 244-252.
Williams, J-R., Berndt, H.D., 1977.Sediment yield prediction based on watershed hydrology Transactions of Americ. Soc. of Agr. Eng, 1100-1104.
Williams, J.R., Jones,C.A., Dyke, P.T., 1984.A modeling approach to determining the relationship between erosion and soil productivityTransactions of Am. Soc. of Agr. Eng., 129-144.
Wischmeier, W.H., Smith, D.D., 1978.Predicting rainfall erosion losses: A guide to conservation planning Agriculture Handbook No 537, U.S. Department of Agriculture, pp. 58pp.