共 5 条
- [2] PHILLIPPE M. M., 1951, SOIL SCI SOC AMER PROC, V15, P138
- [3] ROUSE ED, 1950, SOIL SCI SOC AM P, V14, P113
- [4] Truog E., 1937, SOIL SCI SOC AM, V1, P101, DOI [DOI 10.2136/SSSAJ1937.03615995000100000013X, 10.2136/sssaj1937.03615995000100000013x]
- [5] PURDUE U AGR EXPT ST, V569