Production functions and methods of specifying optimum fertilizer use under various uncertainty conditions for hay /
Heady, Earl O.(Earl Orel),1916-1986,author.
Pesek, John T.,author.
McCarthy, Owen,author.
Iowa State University.Department of Agronomy.
Iowa State University.Agricultural and Home Economics Experiment Station.
Tennessee Valley Authority.
Title from front cover.
Includes bibliographical references.