共 14 条
- [1] Allison LE, 1965, AGRON MONOGR, P1367, DOI DOI 10.2134/AGRONMONOGR9.2.C40
- [2] BEALE O. W., 1955, Soil Science Society of America. Proceedings, V19, P244
- [4] Bremner J.M., 1965, METHODS SOIL ANAL, P1149, DOI DOI 10.2134/AGRONMONOGR9.2.C32
- [5] FREE GR, 1970, 1030 CORN AGR EXP ST
- [6] LAL R, 1975, NO TILLAGE EFFECTS S, P38
- [7] Le Clerg E., 1962, FIELD PLOT TECHNIQUE