sponsored by Divisions C-3, S-3, S-4, and S-6 of of the American Society of Agronomy, the Crop Science Society of America, and the Soil Science Society of America ; editor, W.R. Oschwald ; editor-in-chief, Matthias Stelly ; managing editor, David M. Kral ; assistant editor, Judith H. Nauseef

American Society of Agronomy : Crop Science Society of America : Soil Science Society of America 1978 ASA special publication no. 31

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