Nitrogen Bacteria and Legumes With special reference to red clover, cowpeas, soy beans, alfalfa, and sweet clover, on Illinois soils
by Cyril G. (Cyril George) Hopkins
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2026
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Completed
Description
Subjects: Nitrogen-fixing microorganisms; Nitrifying bacteria. 8 chapters, 7,626 words. Public domain, via Project Gutenberg.