共 7 条
[1]
ALLISON F. E., 1955, Advanc. Agron., V7, P213, DOI 10.1016/S0065-2113(08)60339-9
[2]
ALLISON FE, 1950, SOIL SCI SOC AM PRO, V15, P163
[4]
GERRETSEN FC, 1950, 4TH T INT C SOIL SCI, V2, P114
[5]
GERRETSEN FC, 1949, VERSLAG LANDBOUWK ON, V54
[6]
HARMSEN G. W., 1955, Advanc. Agron., V7, P299, DOI 10.1016/S0065-2113(08)60341-7
[7]
SHAW JA, 1934, IND ENG CHEM ANAL ED, V6, P479