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1
Soil degradation : effects on agricultural productivity /
Washington, D.C. (722 Jackson Place, N.W., Washington, D.C. 20006) : National Agricultural Lands Study, 1980

Government Document Book
2
Farm-level effects of soil conservation and commodity policy alternatives : model and data documentation /
by Sutton, John D.
[Washington, D.C.] : U.S. Dept. of Agriculture, Economic Research Service, Natural Resource Economics Division, 1986

Government Document Book
3
The impacts of farm policies on soil erosion : a problem definition paper /
by Osteen, Craig D.
[Washington, D.C.] : U.S. Dept. of Agriculture, Economic Research Service, Natural Resource Economics Division, 1985

Government Document Book
4
Commodity prices and interest rates influence the level of soil erosion /
by Hyberg, Bengt, 1952-
[Washington, DC] : U.S. Dept. of Agriculture, Economic Research Service, Resources and Technology Division, 1988

Government Document Book
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