Thirty years of crop rotations on the common prairie soil of Illinois
By: by Cyril G. Hopkins, J.E. Readhimer, and Wm. G. Eckhardt.
Contributors: Eckhardt, Wm. G. 1869-; Readhimer, J. E. 1869-
Series: Bulletin (University of Illinois (Urbana-Champaign campus). Agricultural Experiment Station) -- no. 125; Bulletin (University of Illinois (Urbana-Champaign campus). Agricultural Experiment Station) -- no. 125.
Publisher: University of Illinois Agricultural Experiment Station
Published: 1908
Place of publication: Urbana, Ill
Subjects: Crop rotation -- Illinois.; Field experiments -- Illinois.; Soil management -- Illinois.