Profit-maximizing plans for soil-conserving farming in the Spring Valley Creek Watershed in southwest Iowa /
Andersen, Jay C.,author.
Heady, Earl O.(Earl Orel),1916-1986,author.
Shrader, W. D.(William Duncan),author.
Iowa State University.Agricultural and Home Economics Experiment Station.
Iowa State University.Department of Agronomy.
Iowa State University.Department of Economics and Sociology.
Iowa State University.Center for Agricultural and Economic Adjustment.
Title from front cover.
Includes bibliographical references.