Methods of maintaining the productive capacity of Illinois soils
By: by Cyril G. Hopkins
Series: Circular / University of Illinois (Urbana-Champaign campus). Agricultural Experiment Station -- no. 68; Circular (University of Illinois (Urbana-Champaign campus). Agricultural Experiment Station) -- no. 68
Publisher: University of Illinois Agricultural Experiment Station
Published: 1903
Place of publication: Urbana, Ill
Language: eng
Number of pages: 40
Subjects: Soil productivity; Soil amendments
Notes: Caption title.