Relative contributions of major technological factors and moisture stress to increased grain yields in the Midwest, 1930-71
By: by Richard K. Perrin and Earl O. Heady.
Contributors: Heady, Earl Orel, 1916- joint author.
Series: CARD report ; 55; CARD report ;; 55.
Publisher: Center for Agricultural and Rural Development, Iowa State University
Published: 1975
Place of publication: Ames
Language: eng
Number of pages: 43
Subjects: Grain -- Yields -- Middle West.; Crop yields -- Middle West.; Agricultural innovations -- Middle West.; Crops and water -- Middle West.; Agricultural estimating and reporting -- Middle West.; Middle West -- Climate.
Other titles: Relative contributions of major technological factors ...
Notes: Bibliography: leaves 40-43.