cosponsors ... American Society of Agronomy ... [and others] ; editorial committee, Frank W. Schaller, co-editor, Paul Sutton, co-editor ; program planning committee, Paul Sutton, chairman ... [and others]
sponsored by divisions S-4 and C-6 of the Soil Science Society of America, Crop Science Society of America, and the American Society of Agronomy in Anaheim, Calif., 28 Nov.- Dec. 1982 ; editorial committee, R.M. Welch, W.H. Gabelman
sponsored by Divisions C-3, C-6, A-4, and S-4 of the American Society of Agronomy, Crop Science Society of America and the Soil Science Society of America ; editor-in-chief, Matthias Stelly