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References American Farmland Trust. 1984. Soil Conservation in America: What Do We Have to Lose? Washington, D.C. Baker, D. B. 1984. Fluvial Transport and Processing of Sediments in Large Agricultural River Basins. EPA-600/S3-83-054. Washington, D.C.: U.S. Environmental Protection Agency. Brown, G. E. 1983. Information management for conservation decisions. J. Soil Water Conserv. 38:451-454. Christensen, L. A. 1986. Applications of the National Resources Inventory data to inven- tory, monitor, and appraise offsite erosion damage. In Soil Conservation: Assessing the National Resources Inventory, Vol. 2. Washington, D.C.: National Academy Press. Clark, E. H., II, J. A. Haverkamp, and W. Chapman. 1985. Eroding Soils: The Off-Farm Impact. Washington, D.C.: The Conservation Foundation. Colvin, T. S., J. M. Laflen, and D. G. Erbach. 1981. A review of residue reduction by individual tillage implements. Pp. 102-110 in Crop Production with Conservation in the '80s. Proceedings of the American Society of Agricultural Engineers, December 1- 2, 1980. Publications No. 7-81. St. Joseph, Mo.: American Society of Agricultural Engi- neers. Crosson, P. 1984. New perspectives on soil conservation policy. J. Soil Water Conserv. 39:?~-225. Crosson, P., and S. Brubaker. 1982. Resource and Environmental Effects of U.S. Agricul- ture. Washington, D.C.: Resources for the Future. Foster, G. R. 1982. Channel Erosion Within Farm Fields. Preprint 82-007. New York: American Society of Civil Engineers. Foster, G. R. 1986. Understanding ephemeral gully erosion. In Soil Conservation: Assessing the National Resources Inventory, Vol.2. Washington, D.C.: National Acad- emy Press. Gianessi, L. R., and H. M. Peskin. 1981. Analysis of national water pollution control policies. II. Agricultural sediment controls. Water Resources Res. 17:803-821. 95
96 REFERENCES Gillette, D. A. 1986. Wind erosion. In Soil Conservation: Assessing the National Resources Inventory, Vol. 2. Washington, D.C.: National Academy Press. Heimlich, R. E. 1985. Soil erosion on new cropland: A sodbusting perspective. J. Soil Water Conserv. 40:322-326. Heimlich, R. E., and N. L. Bills. 1986. An improved soil erosion classification: Update, comparison, extension. In Soil Conservation: Assessing the National Resources Inven- tory, Vol. 2. Washington, D.C.: National Academy Press. Iowa Geological Survey.1984. Hydrogeologic and Water Quality Investigations in the Big Spring Basin, Clayton County, Iowa; 1983 Water-Year. Open File Report 84-4. Iowa City. Johannsen, C. J. 1986. Potential uses of the NRI in state and local decision making. In Soil Conservation: Assessing the National Resources Inventory, Vol. 2. Washington, D.C.: National Academy Press. Kiniry, L. N., C. L. Scrivner, and M. E. Keener. 1983. A Soil Productivity Index Based Upon Predicted Water Depletion and Root Growth. Research Bulletin 1051. Columbia: College of Agriculture. University of Missouri. Larson, W. E., F. J. Pierce, and R. H. Dowdy. 1983. The threat of soil erosion to long-term crop production. Science 219:458-465. Lee, L. K., and J. J. Goebel. 1984. The Use of the Land Capability Class System to Define Erosion Potential on Cropland. Report No. 85-1. Washington, D.C.: Assessment and Planning, Soil Conservation Service, U.S. Department of Agriculture. McCormack, D. E., and R. E. Heimlich. 1985. Erodible Soils: Definition and Classifica- tion. Report No.85-2. Washington, D.C.: Assessment and Planning, Soil Conservation Service, and Natural Resource Economics Division, Economic Research Service, U.S. Department of Agriculture. Ogg, C. W. 1986. New cropland in the 1982 NRI: Implications for resource policy. In Soil Conservation: Assessing the National Resources Inventory, Vol. 2. Washington, D.C.: National Academy Press. Pierce, F. J., R. H. Dowdy, W. E. Larson, and W. A. P. Graham. 1984. Soil productivity in the Corn Belt: An assessment of erosion's long-term effects. J. Soil Water Conserv. 39:131-136. Pierce, F. J., W. E. Larson, and R. H. Dowdy. 1986. Field estimates of C factors: How good are they and how do they affect calculations of erosion? In Soil Conservation: Assessing the National Resources Inventory, Vol. 2. Washington, D.C.: National Academy Press. Pierce, F. J., W. E. Larson, R. H. Dowdy, and W. A. P. Graham. 1983. Productivity of soils: Assessing long-term changes due to erosion. J. Soil Water Conserv. 38:39-44. Renard, K. G.1986. A discussion of erosion on range and forest lands: Impacts of land use and management practices. In Soil Conservation: Assessing the National Resources Inventory, Vol. 2. Washington, D.C.: National Academy Press. Richards, B. K., M. F. Walter, and R. E. Muck. 1984. Variation in line transect measure- ments of crop residue cover. J. Soil Water Conserv. 39:60-61. Rosenberry, P. E., and B. C. English. 1986. Erosion control practices: Impact of actual versus most effective use. In Soil Conservation: Assessing the National Resources Inventory, Vol. 2. Washington, D.C.: National Academy Press. Runge, C. F., W. E. Larson, and G. lloloff. 1986. A midwestern perspective on targeting conservation programs to protect soil productivity. In Soil Conservation: Assessing the National Resources Inventory, Vol. 2. Washington, D.C.: National Academy Press. Sampson, R. N. 1986. Erosion on range and forest lands: Impacts of land use and man- agement practices. In Soil Conservation: Assessing the National Resources Inventory, Vol. 2. Washington, D.C.: National Academy Press.
REFERENCES 97 Skidmore, E. L., and N. P. Woodruff. 1968. Wind Erosion Forces in the United States and Their Use in Predicting Soil Loss. USDA Agricultural Handbook No. 346. USDA Sci- ence and Education Administration. Washington, D.C.: U.S. Government Printing Office. Society for Range Management. 1985. Announcement. Renewable Resources J. 3:5. Thorne, C. R. 1984. Prediction of Soil Loss Due to Ephemeral Gullies in Arable Fields. Report CER83-84CRT. Ft. Collins: Colorado State University. U.S. Congress, House. 1981. Natural resources data bases. Subcommittee on Depart- ment Operations, Research, and Foreign Agriculture. 97th Cong., 2d sees., June 2. Serial K. U.S. Department of Agriculture. 1981. National Summary Evaluation of the Agricultural Conservation Program: Phase I. Agricultural Stabilization and Conservation Service. Washington, D.C. Walker, D. J., and D. L. Young. 1982. Technical Progress in Yields: No Substitute for Soil Conservation. Current Information Series No.671. Moscow, Idaho: College of Agricul- ture, University of Idaho. WaLker, D. J., and D. L. Young. 1986. Assessing soil erosion productivity models. In Soil Conservation: Assessing the National Resources Inventory, Vol. 2. Washington, D.C.: National Academy Press. Williams, J. R., R. R. Allmaras, K. G. Renard, L. Lyles, W. C. Moldenhauer, G. W. Langdale, L. D. Myer, and W. J. Rawls. 1981. Soil erosion effects on soil productivity: A research perspective. J. Soil Water Conserv. 36:82-90. Wischmeier, W. H., and D. D. Smith. 1978. Predicting Rainfall Erosion Losses: A Guide to Conservation Planning. Agriculture Handbook No.537, USDA Science and Education Administration. Washington, D.C.: U.S. Government Printing Office.
