Proceedings of a symposium - Hauck, Roland D.,; Beaton, J. D.,; Goring, C. A. I.,; Hauck, R. D.,; Hoeft, R. G.,; Randall, G. W.,; Russel, D. A.,; Dinauer, Richard C.,; Ernst, Susan,; Buxton, Dwayne R., (American Society of Agronomy, Inc. ; Crop Science Society of America, Inc. ; Soil Science Society of America, Inc., 1984)