Green manuring
- Source:
- Farmers' bulletin (United States. Dept. of Agriculture) ; no. 1250 1922
- Year:
- 1922
- Subject:
- Green manuring, green manures, cover crops, nitrogen fixation, soil nutrients, soil fertility, nitrogen, legumes, soil inoculation, nitrification, soybeans, grasses, grain crops, tillage, soil pH, and Trifolium lappaceum
- Format:
- 45 p. : ill., 1 map ; 23 cm.
- Language:
- English
- Publisher:
- U.S. Dept. of Agriculture
- Collection:
- Organic Roots Collection