1.Blaylock, M.J., and Huang, J.W. 2000. Phytoextraction of metals, P 53-70. In: I. Raskinand and B.D. Ensley (Eds.), Phytoremediation of Toxic Metals: Using Plants to Clean up the Environment. John Wiley & Sons Inc, New York, NY.
2.Blaylock, M.J., Salt, D.E., Dushenkov, S., Zakharova, O., Gussman, C., Kapulnik, Y., Ensley, B.D., and Raskin, I. 1997. Enhanced accumulation of Pb in Indian mustard by soil-applied chelating agents. Environ. Sci. Technol. 31: 860-865.
3.Bouyoucos, C.J. 1962. Hydrometer method improved for making particle-size analysis of soil. Agron. J. 54: 464-465.
4.Cole, M.M. 1973. Geobotanical and biogeochemical investigation in the sclerophllosis woodland and shrub associations of the eastern gold fields areas of wastern Australia, with particular refrence to the role of Hybanthus floribondos as a nickel indicator and accumulator plant. J. Appl. Ecol. 10: 269-320.
5.Chunling, L., and Zhenguo, Sh. 2006. Enhanced phytoxtraction of Pb and other form artificially contaminated soils through the combined application of EDTA and EDDS. Chemosphere. 63: 1773-1784.
6.Ebbs, S.D., and Kochian, L.D. 1998. Phytoextraction of Zinc by Oat (Avena sativa),
Barley (Hordeum vulgare), and Indian Mustard (Brassica juncea). Environ. Sci. Technol. 32: 802-806.
7.Ebbs, S.D., Lasat, M.M., Brady, D.J., Cornish, J., Gordon, R., and Kochian, L.V. 1997. Phytoextraction of cadmium and zinc from a contaminated soil. J. Environ. Qual. 26: 1426-1430.
8.Fatahi, E., Fotovat, A., Astaraei, A.R., and Haghnia, G.H. 2010. The effects of H
2SO
4 and EDTA on phytoremediation of Pb in soil with three plant Sonflower,
Zea mays and Cotton. Journal of Science and Technology of Agriculture and Natural Resources, Water and Soil Science. 51: 57-68. (In Persian)
9.Feisi asl, V., and Valizadeh, G.R. 2004. Effects of phosphorus and zinc fertilizer applications on nutrient concentrations in plant and grain yield in cv. Sardari «Triticum aestivum» under dryland conditions. Iran. J. Crop Sci. 6: 223-239. (In Persian)
10.Garbisu, C., and Alkorta, I. 2003. Basic concepts on heavy metal soil bioremediation. Eur. J. Min. Proc. Environ. Prot. 3: 1. 58-66.
11.Harter, R.D. 1983. Effect of soil pH on adsorption of lead. Cu, Zn and Ni. Soil Sci. Soc. Am. J. 47: 47-51.
12.Helmke, P.H., and Spark, D.L. 1996. Potassium, P 551-574. In: D.L. Sparks and A.L. Page (Eds.), Methods of Soil Analysis. SSSA, Inc. ASA, Inc. Madison, WI.
13.Hernandez, J.A., Garbisu, C., Barrutia, O., and Becerril, M.J. 2007. EDTA-induced heavy metal accumulation and phytotoxicity in cardoon plants. Enviromental and Experimental Botany. 60: 26-32.
14.Jankite, A., and Vasarevicius, S. 2007. Use of poacea f. species to decontaminate soil from heavy metals. Ekologija. 53: 4. 84-89.
15.Lindsay, W.L., and Norvell, W.A. 1978. Development of a DTPA soil test for zinc, iron, manganese and copper. Soil Sci. Soc. Am. J. 42: 421-428.
16.Loeppert, R.H., and Suarez, D.L. 1996. Carbonate and Gypsum, P 437-474. In: D.L. Sparks et al. (Eds.), Methods of Soil Analysis. SSSA, Inc. ASA, Inc. Madison, WI.
17.Malakooti, M.J., and Nafisi, M. 1994. Fertilizer application in irrigated and non irrigated land. Tehran University Press, 342p. (In Persian)
18.Marchiol, L., Fellet, G., Perosa, D., and Zerbi, G. 2007. Removal of trace metals by Sorghum bicolor and Helianthus annuus in a site polluted by industrial wastes: a field experience. Plant. Physiol. Biochem. 45: 5. 379-387.
19.Meers, E., Lesage, E., Lamsal, S., Hopgood, M.P., Vervaeke, F., Tack, M.G., and Verloo, M.G. 2005. Enhanced phytoextraction.
Int. J. Phytoremediation. 7: 2. 129-142.
20.Neue, H.U., Quijano, L., Senadhira, D., and Setter, T. 1998. Strategies for dealing with micronutrient disorders and salinity in lowland rice system. J. Field Crops Res.
56: 139-155.
21.Norvell, W.A. 1991. Reactions of metal chelates in soil, P 187-227. In: J.J. Mortvedt, F.R. Cox, L.M. Shumanand and R.M. Welch (Eds.), Micronutrients in Agriculture. SSSA Book Series. No4. Soil Sci. Am. Madison. WI.
22.Olsen, S.R., and Sommers, L.E. 1982. Phosphorus, P 539-579. In: A.L. Page, R.H. Miller and D.R. Keeney (Eds.), Methods of soil analysis. Part 2. Chemical microbiological properties. American Society of Agronomy. Inc. Soil Science of America. Inc. Madison. Wisconsin. USA.
23.Shen, Z.G., Zhao, F.J., and McGrath, S.P. 1997. Uptake and transport of zinc in the hyperaccumulator Thlaspi caerulescens and the non hyperaccumulator Thlaspi ochroleucum. Plant Cell Environ. 20: 898-906.
24.Shen, Z.G., Li, X.D., Wang, C.C., Chen, H.M., and Chua, H. 2002. Lead phytoextraction from contaminated soil with high-biomass pant species. J. Enriron. Qual. 31: 1893-1900.
25.Singh, J.P., Llaramanos, R.E., and Stewart, G.W.B. 1988. The mechanism of phosphorus induced zinc deficiency in bean (Phaseolus Vulgarisl). Can. J. Soil. Sci. 68: 345-358.
26.Sumner, M.E., and Miller, W.P. 1996. Cation exchange capacity and exchange coefficients, P 1201-1230. In: D.L. Sparks et al. (Eds.), Methods of Soil Analysis. SSSA. Inc, ASA, Inc. Madison, WI.
27.Tandy, S., Schulin, R., and Nowack, B. 2005. Uptake of metals during chelant-assisted phytoxtraction related to the solubilized metal concentration. Environ. Sci. Technol. 38: 937-944.
28.Topp, G.C., Galynou, B.C., Ball, B.C., and Carter, M.R. 1993. Soil water adsorption curve,
P 569-579. In: M.R. Carter (Eds.), Soil sampling and methods of analysis. Lewis Publishers, Boca Raton, FL.
29.Walkley, A., and Black, I.A. 1934. Examination of the degtjareff method determining soil organic matter and a proposed modification of the chromic acid titration method. Soil Science. 34: 29-38.
30.Westerma, R.E.L. 1990. Soil testing and plant analysis. SSSA. Madison Wisconsin, USA.
31.Wood, P.A. 1997. Remediation methods for contaminated sites, P 47-72. In: R.E. Hester and R.M. Harrisom (Eds.), Issues in environment science and technology. Contaminated land its remediation. The Royal Society of chemistry, Letchworth, U.K.
32.Yan-de, J., Zhen-li, H., and Xiao, Y. 2007. Role of soil rhizobacteria in phytoremediation of heavy metal contaminated soils. J. Zhejiang Univ. Sci. 8: 3. 197-207.
33.Zavid, R.L. 2007. Handbook of chemistry and physics and the American chemical. 88th edition. CRC Press. National Institute of Standards and Technology (retired), USA. 556p.
34.Zhang, M., Alva, A.K., Li, Y.C., and Calvert, D.V. 1997. Chemical association of Cu, Zn, Mn and Pb in selected sandy citrus soils. Soil Sci. 162: 181-188.