Forage plant physiology and Soil-range relationships : two symposia sponsored by the Crop Science Society of America, Soil Science Society of America and American Society of Range Management / program and editorial committees, Forage plant physiology, Wesley Keller, Forage and Range Branch, ARS, USDA, T.S. Ronningen, Cooperative State Experiment Station Service, USDA ; Soil and range relationships, J.E. McClelland, Soil Conservation Service, USDA, A.R. Aandahl, Soil Conservation Service, USDA, F.D. Hole, University of Wisconsin, D.L. Mader, University of Massachusetts ; Matthias Stelley, coordinating editor, ASA special publication series ; Harry Hamilton, managing editor.