共 28 条
[1]
AUSTIN ME, 1972, USDA AGR HDB, V296
[3]
BEALE O. W., 1955, Soil Science Society of America. Proceedings, V19, P244
[5]
Bertrand A. R., 1965, METHODS SOIL ANAL 1, P197
[7]
BLEVINS RL, 1980, SOIL SCI NEW VIEWS, V1
[8]
COPE JT, 1980, 251 AGR EXP STN CIRC
[9]
COPE JT, 1970, 181 AGR EXP STN CIRC