The Role of phosphorus in agriculture :  Proceedings of a symposium held 1-3 june 1976 at the National Fertilizer Development Center, Tennessee Valley Authority, Muscle Shoals, Alabama / 
Editorial Committee F.E. Khasawneh, E.C. Sample, E.J. Kamprath. 
 - Madison, Wisconsin U.S.A. :  American Society of Agronomy,  1980. 
 - 910 pages :  illustrations ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0891180621 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Phosphatic fertilizers--Congresses.<br/>Plants, Effect of phosphorus on--Congresses.<br/>Soils--Phosphorus Content--Congresses.<br/>Phosphate industry--Congresses.