 | Nitrogen fertilizers. | (3) |
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 | Pasture productivity of crested wheatgrass as influenced by nitrogen fertilization and alfalfa / . Rogler, George A. (George Albert), 1913- 4n Washington : U.S. Dept. of Agriculture, 1969. | |
| Liquid nitrogen fertilizers for direct application / . Adams, J. Richard (James Richard), 1898- 4n : U.S. Dept. of Agriculture, Agricultural Research Service, 1965. | |
| Fertilizing Montana wheats to improve grain yield and milling and baking quality / . Bozeman : Montana State University, Montana Agricultural Experiment Station, 1974. | |
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