共 20 条
[1]
ALLEN ON, 1950, EXPT SOIL MICROBIOLO
[4]
BINGHAM F. T., 1954, Proceedings. Soil Science Society of America, V18, P305
[5]
BLACK CA, 1965, METHODS SOIL ANALY 2
[6]
BREMNER J. M., 1968, Analyt. Lett., V1, P837