共 13 条
[1]
BIALOSUKNIA W, 1923, ROCZ NAUK ROLNICZ, V9, P288
[2]
BUCHANAN RE, 1909, CENTBL BAKT, V22, P382
[3]
BURRILL TJ, 1917, ILL AGR EXP STA B, V202
[4]
Fred EB, 1918, J AGRIC RES, V14, P0317
[5]
Hansen R, 1919, Science, V50, P568, DOI 10.1126/science.50.1303.568-b
[6]
HOPKINS, 1910, SOIL FERTILITY LAB M, P22
[7]
KLIMMER, 1914, CENTRALBL BAKT 2, V40, P256
[8]
LOHNIS F, 1921, J AGR RES, V20, P543
[10]
SIMON J, 1914, CENTBL BAKT, V41, P470