Fertilizers, Crop Quality and Economy : Proceedings of a study week on the use of fertilizers and their effect on crop growth, with emphasis on quality and economy / ed. by V. Hernando Fernandez. Fernandez, V. Hernando. Economy. 631.8 FEF Newyork : Elsevier Scientific publishing ; c1974. c1974. 1974 Text LI, 1415 p. : eng