Alef K., and Nannipieri P. 1995. Methods in Applied Soil Microbiology and Biochemistry. Academic Press Harcourt Brace and Company Publishers, London, 576p.
Almas A., Singh B., and Salbu B. 1999. Mobility of cadmium-109 and zinc-65 in soil influenced by equilibration time, temperature, and organic matter. Journal of Environmental Quality, 28: 1742–1750.
Andersson A., and Nilsson K.O. 1972. Enrichment of trace elements from sewage sludge fertilizer in soils and plants. Ambio, 1: 176-179.
Ausmus B.S., Dadson G.J., and Jacson D.R. 1978. Behavior of heavy metals in forest microcosms. Water, Air and Soil Pollution, 10: 19-26.
Chaney W.R., Kelly J.M., and Strickland R.C. 1978. Influence of cadmium and zinc on carbon dioxide evolution from litter and soil from a black oak forest. Journal of Environmental Quality, 7: 115-119.
Chen Y.P., Liu Q., Liu Y.J., Jia F.A., and He X.H. 2014. Responses of soil microbial activity to cadmium pollution and elevated CO2. Scientific Reports, 4: 4287.
Clemente R., Escolar A., and Berna M.P. 2006. Heavy metals fractionation and organic matter mineralization in contaminated calcareous soil amended with organic materials. Bioresource Technology, 97: 1894-1901.
Dumat C., Quenea K., Bermond A., Toinen S., and Benedetti M.F. 2006. Study of the trace metal ion influence on the turnover of soil organic matter in cultivated contaminated soils. Environmental Pollution, 142: 521-529.
Gee G.W., and Bauder J.W. 1986. Particle size analysis. In: Klut A. (Ed.), Method of Soil Analysis-part 1. Physical and Mineralogical Methods. Soil Science Society of America. Madison Wisconsin USA, pp. 383-411.
Golchin A., Clarke P., Oades J.M., and Skjemsad J.O. 1995. The effects of cultivation on the composition of organic matter and structural stability of soils. Australian Journal of Soil Research, 33: 975-993.
Insam H., Hutchinson T.C., and Reber H.H. 1996. Effects of heavy metal stress on the metabolic quotient of the soil microflora. Soil Biology and Biochemistry, 28(4–5): 691-694.
Kabata-Pendias A., and Pendias H. 2011. Trace Element in Soils and Plants. Taylor & Francis Group. USA: CRC, press, 505p.
Kölbl A., and Kögel-Knabner I. 2004. Content and composition of free and occluded particulate organic matter in a differently textured arable Cambisol as revealed by solid-state 13C NMR spectroscopy. Journal of Plant Nutrition and Soil Science, 167: 45–53.
Pradip B., and Subhasish T. 2008. Fractionation and bioavailability of metals and their impacts on microbial properties in sewage irrigated soil. Chemosphere, 72: 543–550.
Quenea K., Lamy I., Winterton P., Bermond A., and Dumat C. 2009. Interactions between metals and soil organic matter in various particle size fractions of soil contaminated with waste water. Geoderma, 149: 217–223.
Safari Sinegani A.A. 2015. Soil organic matter. Bu-Ali Sina University Pubilcation Center, Hamadan, Iran, 364p.
Safari Sinegani A.A. and Jafari Monsef M. 2016. Chemical speciation and bioavailability of cadmium in the temperate and semiarid soils treated with wheat residue. Environmetal Science Pollution Research, 23: 9750–9758.
Safari Sinegani A.A., Sharifi Z., and Safari Sinegani M. 2010. Methods in Applied Microbiology. Bu-Ali Sina University Press, Hamadan, Iran, 525p.
Shuman L. 1999. Organic waste amendments effect on zinc fractions of two soils. Journal of Environmental Quality, 28: 1442–1447.
Sparks D.L., Page A.L., Helmke P.A., and Loeppert R.H. 1996. Methods of Soil Analysis- Part 3. Chemical methods. American Society of Agronomy and Soil Science Society of America.Madison, WI, USA.
Walkley A., and Black I.A. 1934. An examination of the Degtareff method for determining soil organic matter, and a proposed modification of the chromic acid titration method. Soil Science, 37: 29–38.
Wang Y., Shi J., Wang H., Lin Q., Chen X., and Chen Y. 2007. The influence of soil heavy metals pollution on soil microbial biomass, enzyme activity, and community composition near a copper smelter. Ecotoxicology and Environmental Safety, 67(1): 75-81.
YazdanPanah N., Fotovat A., Lakzian A., and Hagniya G. H. 2008. The effect of heavy metals (Cd and Zn) on microbial respiration in calcareous and noncalcareous soils. Journal of Water and Soil, 22(1): 59-69.
Zalaghi R., and Safari-Sinegani A.A. 2014. The importance of different forms of Pb on diminishing biological activities in a calcareous soil. Chemistry and Ecology, 30(5): 446-462.