How valuable are the soils of central Illinois
Subtitle: a ten-year study of selected soils, systems of farming, and relative earnings
By: by W.N. Thompson and P.E. Johnston.
Contributors: Johnston, P. E. 1895-
Series: Bulletin (University of Illinois (Urbana-Champaign campus). Agricultural Experiment Station) -- no. 550; Bulletin (University of Illinois (Urbana-Champaign campus). Agricultural Experiment Station) -- no. 550.
Publisher: University of Illinois Agricultural Experiment Station
Published: 1952
Place of publication: Urbana, Ill
Language: eng
Number of pages: 380
Subjects: Soil productivity -- Economic aspects -- Illinois.; Soil management -- Economic aspects -- Illinois.