共 19 条
- [1] BEEVERS LEONARD, 1964, CROP SCI, V4, P143, DOI 10.2135/cropsci1964.0011183X000400020005x
- [2] BEEVERS LEONARD, 1964, CROP SCI, V4, P139, DOI 10.2135/cropsci1964.0011183X000400020004x
- [3] BROWN EM, 1939, 299 B MO AGR EXP STN
- [4] COLBY W. G., 1965, AGRON J, V57, P169
- [8] Horwitz W., 1960, OFFICIAL METHODS ANA
- [9] KENDALL W. A., 1958, AGRON JOUR, V50, P657