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Cover of Nitrogen Bacteria and Legumes With special reference to red clover, cowpeas, soy beans, alfalfa, and sweet clover, on Illinois soils

Nitrogen Bacteria and Legumes With special reference to red clover, cowpeas, soy beans, alfalfa, and sweet clover, on Illinois soils

Cyril G. (Cyril George) Hopkins

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Subjects

Nitrogen-fixing microorganismsNitrifying bacteria

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