共 52 条
[33]
MARTIN JP, 1977, SOILS MANAGEMENT ORG, P115
[34]
MARTIN JP, 1972, HUMIC SUBSTANCES THE, P171
[37]
SAIZJIMENEZ C, 1975, AN EDAF AGROBIOL, V34, P829
[38]
SAUERBECK D, 1968, ISOTOPES RAD SOIL OR, P57