Soil and fertilizer phosphorus in cro nutrition
Soil and fertilizer phosphorus in cro nutrition edited by W.H. Pierre and A.G. Norman - New York 1953 - 492 p. - Agronomy - a series of monographs .
Vol. IV : Prepared by Ameriacan Society of Agronomy
Phosphorus Requirement
Plant Nutrition
631.811.2 / P 622 S