This work is licensed under a
Creative Commons Attribution 4.0 International License
 P. Blaster, S. Zimmermann, J. Luster & W. Shotyk, Critical examination of trace element enrichment and depletion in soils: As, Cr, Cu, Ni, Pb and Zn in Swiss forest soil, Science of Total Environment. 249(2000): 257-280.
 C. Casia, E. Martinoia, and C. keller. Hyperaccumulation of cadmium and zinc in thlasp. Caerulescens and Arabidopsis halleri at the leaf cellular level, Plant physiology. 134(2004): 716-725.
 M.J. Malakouti and M. Homaee. Fertile soils of arid and semi-arid full review. Second edition. Tarbiat Modarres University Press, Tehran, Iran, (2004).
 H. Marschner . Mineral nutrition of higher plants. Academic Press, London, UK, (1995).
 S.P. McGrath, S.J. Dunham and R.L. Correl. Potential for phytoextraction of zinc and cadmium from soils using hyperaccumulator plants, in phytoremediation of contaminated soil and water. Terry, N. and Banuelos, G. Sd., CRC Press LLC, (2000).
 O. Atici, G. Agar, and P. Battal . Changes in phytohormone contents in chickpea seeds geminating under lead or zinc stress, Biologia plantarum, 49 (2)(2005): 215-222.
 M. Ali Ehyaei, and A.A. Behbahanizadeh. Methods Describe of chemical analysis of soil. Soil and Water Research Institute Publications, Iran, (1993).
 R.E.L. Westerma. Soil testing and plant analysis. SSSA. Madison wisconsin, USA, (1990).
 F. Wu, W. Yang, J. Zhang, and L. Zhou. Cadmium accumulation and growth responses of a poplar (Populus deltoides × Populus nigra) in cadmium contaminated purple soil and alluvial soil. Journal of Hazardous Materials 177(1-3)(2010): 268-273.
 G. Rosa., J. Peralta_videa, R., Montes, M., J. L Parsons. Cadmium uptake and translocation in tumbleweed (salsola kali), a potential cd-hyperaccumulator desert plant species: ICPLOES and XAS studies. Chemosphere 55(2004): 1159-1168.