The conservation reserve in south-central Iowa /
Butcher, Walter R.,author.
Heady, Earl O.(Earl Orel),1916-1986,author.
Rigler, Larry G.,author.
Iowa State University.Agricultural and Home Economics Experiment Station.
Iowa State University.Department of Economics and Sociology.
Iowa State University.Center for Agricultural and Economic Adjustment.
United States.Department of Agriculture.Economic Research Service.Farm Production Economics Division
Title from front cover.
Includes bibliographical references.