TY - BOOK AU - Hutcheson, T.B. AU - Kipps, M.S. AU - Wolfe, T.K. TI - The production of field crops: a textbook of agronomy U1 - 633 21st ed PY - 1945/// CY - New York PB - McGraw-Hill KW - Fertilizers KW - Field crops KW - Field crops-Seeds KW - Planting time N1 - Iindex: pp 427-45 ER -