共 8 条
- [1] ALBRECHT W. A., 1939, Transactions Int. Soc. Soil Sci. yd Comm. A., P71
- [3] ALBRECHT WA, 1938, MISSOURI AGR EXP STA, V294
- [4] ALBRECHT WM. A., 1940, JOUR AMER SOC AGRON, V32, P148
- [5] BAVER LD, 1937, MISSOURI AGR EXP STA, V267
- [7] MEYERS HE, 1937, SOIL SCI, V44, P331
- [8] SKINNER JJ, 1940, N C AGR EXP STA B, V316