editors, D.L. Karlen, R.J. Wright, and W.O. Kemper ; organizing committee, D.L. Karlan and W.D. Kemper ; editor[s]-in-chief, Gary A. Peterson, P.S. Baenziger, Robert J. Luxmoore

American Society of Agronomy : Crop Science Society of America : Soil Science Society of America 1995 ASA special publication no. 58

editorial committee, Ralph S. Baker, Glendon W. Gee, Cynthia Rosenzweig

Soil Science Society of America 1994 SSSA special publication no.41

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sponsored by Division S-6 of the Soil Science Society of America ; organizing committee, Arthur E. Peterson, James B. Swan ; co-editors, Arthur E. Peterson, James B. Swan, coordinating editor, Matthias Stelly, managing editor, David M. Kral, assistant editor, Judith H. Nauseef

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