共 42 条
- [1] Aamodt OS, 1923, J AGRIC RES, V24, P0457
- [2] Aamodt OS, 1927, PHYTOPATHOLOGY, V17, P573
- [3] Barker H. D., 1923, MINN AGR EXP STA TEC, V20
- [4] Briggs FN, 1926, J AGRIC RES, V32, P0973
- [5] CLARK J. A., 1928, Journal of the American Society of Agronomy, V20, P152
- [7] DICKSON JAMES G., 1926, JOUR AMER SOC AGRON, V18, P314
- [8] Dietz SM, 1928, J AGRIC RES, V37, P0001
- [9] EVANS, 1911, J AGR SCI, V4, P95
- [10] Gaines EF, 1923, J AGRIC RES, V23, P0445