共 14 条
- [1] BAKER JOHN N., 1961, JOUR RANGE MANAGEMENT, V14, P216, DOI 10.2307/3895153
- [3] Briggs LJ, 1915, J AGRIC RES, V4, P391
- [4] BURTON GLENN W., 1957, AGRON JOUR, V49, P498
- [6] HUNT O. J., 1962, CROP SCI, V2, P97, DOI 10.2135/cropsci1962.0011183X000200020003x
- [7] JOHANSEN D. A., 1940, PLANT MICROTECHNIQUE
- [10] SPACKMAN DH, 1963, FED PROC, V22, P244