[1]
Pulhani, V.A., Dafauti, S., Hegde, A.G., Sharma, R.M. and Mishra, U.C. (2005) Uptake and Distribution of Natural Radioactivity in Wheat Plants from Soil. Journal of Environmental Radioactivity, 79, 331-346.
http://dx.doi.org/10.1016/j.jenvrad.2004.08.007
[2]
Vinogradov, A.P. (1959) The Geochemistry of Rare and Dispersed Chemical Elements in Soils. 2nd Edition, Consultants Bureau, New York.
[3]
Chen, Y. and Cutright, T. (2001) EDTA and HEDTA Effects on Cd, Cr, and Ni Uptake by Helianthus annuus. Chemosphere, 45, 21-28.
http://dx.doi.org/10.1016/S0045-6535(01)00031-5
[4]
Meers, E., Ruttens, A., Hopgood, M.J., Samson, D. and Tack, F.M.G. (2005) Comparison of EDTA and EDDS as Potential Soil Amendments for Enhanced Phytoextraction of Heavy Metals. Chemosphere, 58, 1011-1022.
http://dx.doi.org/10.1016/j.chemosphere.2004.09.047
[5]
Blanco Rodríguez, P., Vera Tomé, F., Pérez Fernaández, M. and Lozano, J.C. (2006) Linearity Assumption in Soil-to- Plant Transfer Factors of Natural Uranium and Radium in Helianthus annuus L. Science of the Total Environment, 361, 1-7.
http://dx.doi.org/10.1016/j.scitotenv.2005.08.020
[6]
Prasad, M.N.V. and Freitas, H.M.O. (2003) Metal Hyperaccu-mulation in Plants Biodiversity Prospecting for Phytore-mediation Technology. Electronic Journal of Biotechnology, 6, 285-321.
http://dx.doi.org/10.2225/vol6-issue3-fulltext-6
[7]
Huang, J.W., Blaylock, M.J., Kapulnik, Y. and Ensley, B.D. (1998) Phytoremediation of Uranium-Contaminated Soils: Role of Organic Acids in Triggering Uranium Hyperaccumulation in Plants. Environmental Science Technology, 32, 2004-2008.
http://dx.doi.org/10.1021/es971027u
[8]
Song, G., Chen, D.Y., Zhang, Z.Q. and Xie, W.B. (2012) Natural Radioactivity Levels in Topsoil from the Pearl River Delta Zone, Guangdong, China. Journal of Environmental Radioactivity, 103, 48-53.
http://dx.doi.org/10.1016/j.jenvrad.2011.06.014
[9]
Yunoki, E., Katoaka, T., Michiro, K., Sugiyama, H., Shimizu, M. and Mori, T. (1993) Activity Concentrations of 238U and 226Ra in Agricultural Samples. Journal of Radio Analytical Nuclear Chemistry Articles, 174, 223-228.
http://dx.doi.org/10.1007/BF02037909