共 10 条
[2]
Bremner J.M., 1965, METHODS SOIL ANAL PA, P1149
[3]
Cope WC., 1916, J IND ENG CHEM, V8, P592
[4]
GEHRKE CW, 1972, J ASSOC OFF ANA CHEM, V55, P467
[9]
OLSEN C, 1929, COMPT REND TRAV LAB, V17
[10]
PRUDEN G, 1984, FERT RES