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2The role of phosphorus in agriculture: proceedings The role of phosphorus in agriculture: proceedingsby 82915 Khasawneh, F.E., 115542 Sample, E.C., 82168 Kamprath, E.J. eds., 2680 American Society of Agronomy, Madison, WI (EUA), 6665 Crop Science Society of America, Madison, WI (EUA), 18133 Soil Science Society of America, Madison, WI (EUA), 38437 Symposium National Fertilizer Development Center, Tennessee Valley Authority Muscle Shoals, Alabama, AL (EUA) 1-3 Jun 1976
Published 1980bibliotecaIICA