Economic optima in soil conservation farming and fertilizer use for farms in the Ida-Monona soil area of western Iowa /
Dean, Gerald W.,author.
Heady, Earl O.(Earl Orel),1916-1986,author.
Husain, S. M. A.,author.
Duncan, E. R.,author.
Iowa State College.Agricultural and Home Economics Experiment Station.
Iowa State College.Department of Economics and Sociology.
Iowa State College.Department of Agronomy.
Tennessee Valley Authority.
Title from front cover.
Includes bibliographical references.