共 7 条
- [1] ALLOS H. F., 1959, SOIL SCI, V87, P61, DOI 10.1097/00010694-195902000-00001
- [2] BOONE LV, 1972, ILL RES, V14, P5
- [3] Bremner J.M., 1965, METHODS SOIL ANAL PA, P1149
- [5] SEARS O. H., 1951, Soybean Digest, V11, P15
- [7] WELCH LF, 1972, ILL RES, V14, P3