Crop production in the Great Plains area
Subtitle: relation of cultural methods to yields
By: by E.C. Chilcott and J.S. Cole and W.W. Burr
Contributors: Cole, John S. (John Selden), 1878-; Burr, W. W. (William Wesley), 1880-
Series: Bulletin / United States Department of Agriculture -- no. 268; Bulletin of the U.S. Department of Agriculture -- no. 268.
Publisher: U.S. Dept. of Agriculture
Published: 1915
Place of publication: Washington, D.C
Language: eng
Number of pages: 28
Subjects: Crop yields; Tillage
Notes: Caption title.

"July 20, 1915."