1. Angle, J. S., Baker, A. J. M., Whiting, N. S. and Chaney, R. L. 2003. Soil Moisture Effects on Uptake of Metals by Thlaspi, Alyssum, and Berkheya. Plant Soil, 256: 325-332.
2. Barcelo, J., Vazquez, M. D. and Poschenrieder, C. H. 1988. Structural and Ultra-structural Disorder in Cadmium-treated Bush Bean Plants. New Phytol., 108: 37-49
3. Castillo-Michel, H. A., Hernandez, N., Martinez-Martinez, A., Parsons, J. G., Peralta-Videa, J. R. and Gerdea-Torresdey, J. L. 2009. Coordination and Speciation of Cadmium in Corn Seedlings and Its Effects on Macro- and Micronutrients Uptake. Plant Physiol. Biochem., 47: 608-614.
4. Chaney, R. L., Li, Y. M., Angle, J. S., Brewer, E. P., Saunders, J. P. and Baker, A. J. M. 1998. Converting Metal Hyperaccumulator Wild Plants into Commercial Phytoremediation Systems: Approaches and Progress. In: "Proceeding of the Fourth International Conference on Biogeochemistry of Trace Elements", (Eds.): Banũelos, G. S. and Terry, N.. Berkeley, CA, PP. 623-624.
5. Chen, H. and Cutright, T. 2001. EDTA and DTPA Effects on Cd, Cr, and Ni Uptake by Helianthus annus. Chemosphere, 45: 21-28.
6. Corey, R. B., King, L. D., Lue-Hing, C., Fanning D. S., Street J. J. and Walker, J. M. 1987. Effects of Sludge Properties on Accumulation of Trace Elements by Crops. In: "Land Application of Sludge", (Ed.): Page, A. L.. Lewis Public., Chelsea, MI, PP. 25-51.
7. Dikinya, O. and Areola, O. 2010. Comparative Analysis of Heavy Metal Concentration in Secondary Treated Wastewater Irrigated Soils Cultivated by Different Crops. Int. J. Environ. Sci. Tech., 7: 337-346.
8. di Toppi, S. L. and Gabrielli, R. 1999. Response to Cadmium in Higher Plants. Environ. Exp. Bot., 41: 105-130.
9. Grifferty, A. and Barrington, S. 2000. Zinc Uptake by Young Wheat Plants under Two Transpiration Regimes. J. Environ. Qual., 29: 443-446.
10. John, M. K., Van Laerhoven, C. J. and Chuah, H. H. 1972. Factors Affecting Plant Uptake and Phtotoxicity of Cadmium Added to Soils. Environ. Sci. Technol., 6: 1005-1006.
11. Kirkham, M. B. 1978. Water Relation of Cadmium-Treated Plants. J. Environ. Qual., 7: 334-336.
12. Logan, T. J. and Chaney, R. L. 1987. Nonlinear Rate Response and Relative Crop Uptake of Sludge Cadmium for Land Application of Sludge Risk Assessment. In: "Heavy Metals in the Environ", (Eds.): Lindberg, S. E. and Hutchinson, T. C.. Proc. 6th Int. Conf. CEP Consultants, Edinburgh, Scotland, PP. 387-388.
13. Logan, T. J., Lindsay, B J., Goins, L. E. and Ryan, J. A. 1997. Field Assessment of Sludge Metal Bioavailability to Crops: Sludge rate response. J. Environ. Qual., 26: 534-550.
14. Marchiol, L., Sacco, P., Assolari, S. and Zebri, G. 2004. Reclamation of Polluted Soil: Phytoremediation Potential of Crop-related Brassica Species. Water Air Soil Pollut., 158: 345-356.
15. Motesharezadeh, B., Savaghebi-Firoozabadi,Gh. R., Mirseyed Hosseini H. and Alikhani, H. A. 2010. Study of the Enhanced Phytoextraction of Cadmium in a Calcareous Soil. Int. J. Environ. Res., 4: 525-532.
16. Page, A. L., Logan, T. J. and Ryan, J. A. 1987. Land Application of Sludge-food-chain Implications. Lewis Public., Chelsea, MI, PP.168.
17. Peralta-Videa, J. R., Gerdea-Torresdey, J. L., Gomez, E., Tiemann, K. J., Parsons, J. G. and Carrillo, G. 2002. Effect of Mixed Cadmium, Copper, Nickel and Zinc at Different Phs Upon Alfalfa Growth and Heavy Metal Uptake. Environ. Pollut., 119: 291-301.
18. Rascio, N., Vecchia, F. D. Ferretti, M. Merlo, L. and Ghisi, R. 1993. Some Effects of Cadmium on Maize Plants. Arch. Environ. Contam. Toxicol., 25: 244-249.
19. Robinson, B. H., Mills, T. M., Petit, D., Fung, L. E., Green, S. R. and Clothier, B. E. 2000. Natural and Induced Cadmium-accumulation in Poplar and Willow: Implication for Phytoremediation. Plant Soil, 227: 301-306.
20. Sameni A. M., Maftoun, M. and Bassiri, A. 1987. Response of Tomato and Sweet Corn to Different Cadmium Levels in Calcareous Soils. J. Hort. Sci., 62: 227-232.
21. Sanchez, A. G., Ayuso, E. A. and de Blas, O. J. 1999. Sorption of Heavy Metals from Industrial Waste Water by Low-cost Mineral Silicats. Clay, Miner., 34: 469-477.
22. Saucedo, D., Sammis, T. W., Picchioni, G. A. and Mexal, J. G. 2005. Wastewater Application and Water Use of Larrea tridentate. Agric. Water Manage., 82: 343-353.
23. Shayegan, J. and Afshari, A. 2004. The Treatment Situation of Municipal and Industrial Wastewater in Iran. J. Water Wastewater, 49: 58-69. (in Farsi)
24. Toze, S. 2006. Reuse of Effluent Water-Benefits and Risks. Agric. Water Manage., 80: 147-159
25. Tyler, L. D. and McBride, M. B. 1982. Influence of Ca, pH and Humic Acid on Cd Uptake. Plant Soil, 64: 259-262.
26. Van Genuchten, M. T. 1980. A Closed-form Equation for Predicting the Hydraulic Conductivity of Unsaturated soils. Soil Sci. Soc. Am. J., 44: 892-898.
27. Wallace, A., Romney, E. M., Alexander, G. V., Soufi, S. M. and Patel, P. M. 1977. Some Interactions in Plants among Cadmium, other Heavy Metals and Chelating Agents. Agron. J., 69: 18-20.
28. Walker, W. M., Miller, J. E. and Hassett, J. J. 1977. Effect of Lead and Cadmium upon the Calcium, Magnesium, Potassium, and Phosphorus Concentration in Young Corn. Soil Sci., 124: 145-151.
29. Youn-Joo, A. 2004. Soil Ecotoxicity Assessment Using Cadmium Sensitive Plants. Environ. Pollut., 127: 21-26.