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Nitrogen-fixing bacteria and legumes
- Leonard, Lewis T.
- Farmers' bulletin / United States Department of Agriculture ; no. 1784 1937
- Nitrogen -- Fixation, Nitrifying bacteria, Legumes -- Inoculation, nitrogen-fixing bacteria, soil inoculation, soil bacteria, cowpeas, in vitro culture, soybeans, root nodules, alfalfa, Trifolium pratense, and inoculum
- U.S. Dept. of Agriculture
- Organic Roots Collection