Determinants of soil loss tolerance : proceedings of a symposium - Schmidt, B. L.; Allmaras, R. R.; Mannering, J. V.; Papendick, R. I.; Kral, David M.; Hawkins, Sherri; Mannering, J. V.; Gilkeson, R. A.; Klock, G. 0.; Moldenhauer, W. C.; Daniels, R. D.; Kimberlin, Leon (American Society of Agronomy ; Soil Science Society of America, 1982)