ABSTRACT:
Drawing upon work done in the north central United States with the soil productivity index (PI), researchers from other countries are testing the applicability of the PI approach to quantifying the relationship between soil erosion and soil productivity on different soils and under different climatic conditions. Reported here is a comparison of research results from the United States, Hawaii, India, Nigeria, and Mexico. These results show that the PI approach is a promising tool, especially when factors in the model are modified to account for specific soil characteristics that differ from those soils in the north central United States for which the model was originally designed.
Footnotes
Frank Rijsberman, currently a graduate student at Colorado State University, Fort Collins, is project engineer, Delft Hydraulics Laboratory, 2600 MH Delft, The Netherlands, and M. Gordon Wolman is chairman and professor, Department of Geography and Environmental Engineering, The Johns Hopkins University, Baltimore, Maryland 21218. The authors acknowledge the following persons for their assistance with the individual studies and the workshop: P. Buringh, S. A. El-Swaify, A. Flores Diaz, R. Lal, W. E. Larson, A. Lo, F. J. Pierce, C. L. Scrivner, K. L. Srivastava, and S. M. Virmani. The study and workshop were supported by grants from the Dutch Ministry of Science and Education and the International Federation of Institutes for Advanced Study, Stockholm, Sweden.
- Copyright 1985 by the Soil and Water Conservation Society
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