Soil productivity indexes for Illinois counties and soil associations Mausel, P. W. creator Carmer, S. G. contributor Runge, Edward C. A. contributor text book Urbana University of Illinois at Urbana-Champaign, College of Agriculture, Agricultural Experiment Station 1975 1975
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ENG Cover title. Illinois Soil productivity Soils S599.I5 M38 631.4/9773 Bulletin (University of Illinois at Urbana-Champaign. Agricultural Experiment Station) https://www.biodiversitylibrary.org/bibliography/16705 1726922 10.5962/bhl.title.16705 DLC