Soybeans
Subtitle: their effect on soil productivity
By: [by O.H. Sears].
Series: Bulletin / University of Illinois (Urbana-Champaign campus). Agricultural Experiment Station -- no. 456; Bulletin (University of Illinois (Urbana-Champaign campus). Agricultural Experiment Station) -- no. 456.
Publisher: University of Illinois Agricultural Experiment Station
Published: 1939
Place of publication: Urbana, Ill
Language: eng
Number of pages: 571
Subjects: Soybean.; Crop rotation.; Crops and soils.