共 8 条
- [2] BLEVINS RL, 1970, 187 U KENT COLL AGR
- [3] DANIEL HA, 1956, USDA6 PROD RES RPT
- [5] Nelson L. R., 1975, Georgia Agricultural Research, V17, P26
- [6] NELSON LR, 1977, AGRON J, V69
- [7] STEEL R. G. D., 1960, PRINCIPLES PROCEDURE
- [8] ZINGG AW, 1957, USDA1166 TECH B