ABSTRACT:
Based on a concept of multiple T values, a method is presented to establish a quantitative basis for soil loss tolerance, T1, to maintain long-term soil productivity. T1 is a function of a soil's productivity, its vulnerability to productivity losses from erosion, an allowable reduction in productivity, and a planning horizon in years. Soils with little vulnerability to productivity losses from erosion will have a soil loss tolerance, T2, determined by other erosion concerns. The method has broad application. It requires only that the index of soil productivity used be normalized to a range of 0.0 to 1.0.
Footnotes
F. J. Pierce is an associate scientist and W. E. Larson is head of the Soil Science Department, University of Minnesota, St. Paul, 55108. R. H. Dowdy is a research soil scientist with the Agricultural Research Service, U.S. Department of Agriculture, and a professor at the University of Minnesota, St. Paul. This article is a contribution from the Minnesota Agricultural Experiment Station, Paper No. 13,715, Scientific Journal Series and the Soil and Water Management Research Unit, ARS, USDA. The authors thank the Soil Conservation Service for its support.
- Copyright 1984 by the Soil and Water Conservation Society
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