| 
		
Bjerre, G. K., and H. H. Schierup. 1985. Influence of waterlogging on availability and uptake of heavy metals by oat grown in different soils. Plant Soil 88: 45-56.Bouyoucos, C. J. Hydrometer method improved for making particle size analysis of soils. Agron. J. 54: 464-465.Deka, A. K., and S. R. Poonia. 1998. Effect of pH on Cu sorption in untreated and farmyard manure treated soil from semi-arid region. J. Indian Soc. Soil Sci. 46: 484-488.Halder, A., and L. N. Mandal. 1979. Influence of soil moisture regimes and organic matter application on the extractable Zn and Cu content in rice soils. Plant Soil 53: 203-213.Han, F. X., and A. Banin. 2000. Long-term transformations of cadmium, cobalt, copper, nickel, zinc, vanadium, manganese, and iron in arid-zone soils under saturated conditions. Commun. Soil Sci. Plant Anal. 31: 943-957.Iu, K. L., D. Pulford, and H. J. Duncan. 1981. Influence of waterlogging and lime or organic matter additions on the distribution of trace metals in acid soil II. Zinc and copper. Plant Soil 59: 327-333.Kashem, M. A., and B. R. Singh. 2004. Transformation in solid phase species of metals as affected by flooding and organic matter. Commun. Soil Sci. Plant Anal. 35: 1435-1456.Lehman, R. G., and R. D. 1984. Assessment of copper-soil bond strength by desorption kinetics. Soil Sci. Soc. Am. J. 48: 769-772.Lu, A., S. Zhang, and X. Shan. 2005. Time effect on the fractionation of heavy metals in soils. Geoderma 125: 225-234.Ma, Y. B., and N. C. Uren. 1995. Application of a new fractionation scheme for heavy metals in soils. Commun. Soil Sci. Plant Anal. 26: 3291-3305.Ma, Y. B., and N. C. Uren. 1997. The fate and transformation of zinc added to soils. Aust. J. Soil Res. 35: 727-738.Ma, Y. B., and N. C. Uren. 1998. Transformation of heavy metals added to soil – Application of a new sequential extraction procedure. Geoderma 84: 157-168.Maftoun, M., N. Karimian, and F. Moshiri. Sorption characteristics of copper (II) in selected calcareous soils of Iran in relation to soil properties. Commun. Soil Sci. Plant Anal. 33: 2279-2289.Maftoun, M., V. Mohasseli, N. Karimian, and A. Ronaghi. Laboratory and greenhouse evaluation of five chemical extractants for estimating available copper in selected calcareous soils of Iran. Commun. Soil Sci. Plant Anal. 34: 1451-1463.McLaren, R. G., and D. V. Crawford, Jr. 1973. Studies on soil copper. I. The fractionation of copper in soils. J. Soil Sci. 24: 172-181.Page, A. L., R. H. Miller, and D. R. Keeney. 1982. Methods of Soil Analysis, Part 2, 2nd ed., Am. Soc. Agron. Madison, WI.Saha, J. K., and B. Mandal. 2000a. Redistribution of copper in Alfisols under submergence. I. Native copper. Commun. Soil Sci. Plant Anal. 31: 1111-1119.Saha, J. K., and B. Mandal. 2000b. Redistribution of copper in Alfisols under submergence. II. Applied copper. Commun. Soil Sci. Plant Anal. 31: 1121-1127.Saha, J. K., G. C. Hazra, and B. Mandal. 1992. Changes in DTPA extractable Fe, Mn, Zn, and Cu in Alfisols on submergence. J. Indian Soc. Soil Sci. 40: 187-189.Saha, P. K., and L. N. Mandal. 1996. Effect of sludge, zinc and copper on the transformation of zinc and copper in sewage-fed fish pond soil. J. Indian Soc. Soil Sci. 44: 673-677.Shuman, L. M. 1988. Effect of organic matter on the distribution of manganese, copper, iron, and zinc in soil fractions. Soil Sci. 146: 192-198.Sims, J. L., and W. H. Patrick. 1978. The distribution of micronutrient cations in soil under condition of varying redox potential and pH. Soil Sci. Soc. Am. J. 42: 258-262.Singh, B., Y. Singh, S. Sanda, and O. P. Meellu. 1992. Effect of green manure, wheat straw, and organic matter on DTPA extractable Fe, Mn, Zn, and Cu in a calcareous sandy loam soil at field capacity and under waterlogged condition. J. Indian Soc. Soil Sci. 40: 114-118.Singh, J. P., S. P. S. Karwasar, and M. Singh. 1988. Distribution and forms of copper, iron, manganese, and zinc in calcareous soils of India. Soil Sci. 146: 359-365.Taylor, R. W., H. Xiu, A. A. Mehadi, J. W. Shuford, and W. Tadesse. 1995. Fractionation of residual cadmium, copper, nickel, lead, and zinc in previously sludge-amended soil. Commun. Soil Sci. Plant Anal. 26: 2193-2204.Yu, S., Z. L. He, C. Y. Huang, G. C. Chen, and D. V. Calvert. 2004. Copper fractionation and extractability in two contaminated variable charge soils. Geoderma 123: 163-175. |