Kilmer, V. J. The role of potassium in agriculture: proceedings of a symposium held at the National Ferlizer Development Centre TVA, Muscle Shoals, Alabama, June 18-19, 1968 - Madison: American Society of Agronomy Inc., 1968 - xvi,509p. ill. 24cm. Includes bibliographical references Subjects--Topical Terms: AgricultureSoilsPotassium content LC Class. No.: BOT QD181.K1R6