共 15 条
[2]
BREMNER J. M., 1965, Monographs of the American Society of Agronomists, V9, P1179
[3]
Bremner J. M., 1996, METHODS SOIL ANAL 3, P1085
[6]
JOHNSON DR, 1979, AGRON J, V71, P538, DOI 10.2134/agronj1979.00021962007100040004x
[10]
OLSEN SR, 1954, USDA939 CIRC