editors, R.W. Skaggs, J. van Schilfgaarde ; managing editor, J.M. Bartels ; editor-in-chief ASA publications, J. Hatfield, editor-in-chief CSSA publications, J. Volenec, editor-in-chief SSSA publications, J. Bigham

American Society of Agronomy : Crop Science Society of America : Soil Science Society of America 1999 Agronomy no. 38

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editors, J.M. Bigham and E.J. Ciolkosz ; organizing committee, J.M. Bigham ; editor-in-chief SSSA, R.J. Luxmoore

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