Cover Image

Relative contributions of major technological factors and moisture stress to increased grain yields in the Midwest, 1930-71 /

Bibliographic Details
Main Authors: Perrin, Richard K., Heady, Earl O. (Earl Orel), 1916-1986 (Author)
Format: Book
Language:English
Published: Ames : Center for Agricultural and Rural Development, Iowa State University, 1975.
Series:CARD report ; 55.
Subjects:
Grain > Yields > Middle West.
Crop yields > Middle West.
Middle West > Climatic factors.
Agricultural innovations > Middle West.
Crops and water > Middle West.
Agricultural estimating and reporting > Middle West.
Description
Item Description:Microform.
Physical Description:iii, 43 leaves ; 24 cm.
Bibliography:Bibliography: leaves 40-43.