共 9 条
- [1] ALLEN EK, 1958, ENCYCLOPEDIA PLANT P, V8, P48
- [2] ALLRED B. W., 1949, JOUR RANGE MANAGEMENT, V2, P17, DOI 10.2307/3893829
- [3] ASHFORD R., 1960, Canadian Journal of Plant Science, V40, P574
- [4] BOLTON JL, 1962, ALFALFA
- [5] BURTON JC, 1965, MICROBIOLOGY SOIL FE, P107
- [6] FRED EB, 1932, 5 U WISC STUD SCI
- [7] MEYER RE, 1971, 1423 US DEP AGR TECH
- [9] Waksman S.A., 1952, SOIL MICROBIOLOGY