共 16 条
- [1] [Anonymous], 1947, AGR ENG
- [2] ATTOE OJ, 1946, SOIL SCI SOC AM P, V11, P221
- [3] BRAY RH, 1945, SOIL SCI, V32, P329
- [4] COMPTON LL, 1943, SOIL SCI SOC AM P, V7, P368
- [5] DEAN LA, 1954, SOIL SCI SOC AM P, V18, P463
- [6] FINNEY KF, 1948, CEREAL CHEM, V25, P291
- [7] HAAS HJ, 1957, USDA1164 TECH B
- [8] HALLSTED AL, 1936, 273 KANS AGR EXP STA
- [9] HALLSTED AL, 1937, 1935 1936 KANS STAT, P98
- [10] KMOCH H. G., 1957, AGRON JOUR, V49, P20