共 9 条
[1]
Chapman H.D., 1961, METHODS ANAL SOILS P, P1
[2]
COOK C. W., 1952, Journal of Range Management, V5, P331, DOI 10.2307/3894038
[3]
COOK C. WAYNE, 1959, JOUR RANGE MANAGEMENT, V12, P289, DOI 10.2307/3894974
[4]
HYDER D. N., 1959, JOUR RANGE MANAGEMENT, V12, P271, DOI 10.2307/3894970
[5]
PATTON A. R., 1942, JOUR ANIMAL SCI, V1, P22
[7]
1968, NUTRIENT REQUIREMENT
[8]
[No title captured]
[9]
1970, NUTRITIONAL REQUIREM