Klinc J R, Rust R H. Fractionation of copper in neutron activated soils [J]. Soil Sci Soc Am Proc, 1966, 30:188 - 192.
[9]
Mclaren R G, Crawfold D V. Studies on Soil Copper: Ⅰ. The fraction of Cu in soils[J]. J Soil Sci, 1973, 24:172 - 181.
[10]
Shuman L M. Zinc, manganese, and copper in soil fractions [J]. Soil Sci, 1979, 127:10 - 17.
[11]
Tessier A, Campbell P G G, Biason M. Sequential extraction procedure for the speciation for particulate trace metal[J]. Analytical Chemistry, 1979, 51 (7): 844 - 850.
[12]
Mcbride M B. Chemical sorption of Cd on oalcite surfaces[J]. Soil Sci Soc Am J, 1980,44(1): 26 -28.
