共 47 条
[11]
BREMNER J. M., 1955, Journal of Agricultural Science, V45, P469, DOI 10.1017/S0021859600046050
[12]
Coldwell B. B., 1950, Scientific Agriculture, V30, P456
[13]
CROMACK K, 1972, THESIS U GEORGIA
[17]
FISHER SF, 1970, THESIS DARTMOUTH COL
[19]
FLAIG W, 1966, USE ISOTOPES SOIL OR, P103
[20]
FREDRIKSEN RL, 1972, FOREST LAND USES STR, P125