共 6 条
- [3] OLSEN SR, 1962, P SOIL SCI SOC AM, V26, P222
- [4] TEPE W., 1958, Landwirtschaftliche Forschung, V11, P217
- [5] WIERSUM L. K., 1961, Plant and Soil, V15, P189, DOI 10.1007/BF01347227
- [6] WIERSUM L. K., 1962, Plant and Soil, V16, P62, DOI 10.1007/BF01378158