共 26 条
- [1] ALLEN RE, 1961, CROP SCI, V1, P328
- [2] Clark JA, 1929, J AGRIC RES, V38, P0205
- [3] CLARK JA, 1926, USDA1403 B
- [4] Cook OF, 1914, J AGRIC RES, V3, P387
- [5] CULTER GH, 1919, J AM SOC AGRON, V11, P76
- [6] EVERSON EH, 1957, J AM SOC AGRON, V49, P521
- [7] Florell VH, 1936, J AGRIC RES, V53, P0151
- [8] Florell VH, 1931, J AGRIC RES, V43, P0475
- [9] GOULDEN CH, 1926, MINNESOTA AGR EXP ST, V33, P1
- [10] GUETTINGER DL, 1966, CROPS SOILS, P14