共 11 条
- [1] CROWTHER E. M., 1947, Sugar Beet Rev., V16, P19
- [2] DRAYCOTT A. P., 1970, Journal of Agricultural Science, V74, P567, DOI 10.1017/S0021859600017706
- [8] ULRICH A, 1969, SUGAR BEET NUTRIENT
- [9] ULRICH A, 1961, PLANT ANALYSIS FERTI, P190
- [10] WIDDOWSON FV, 1973, 1972 ROTH REP 2, P111