Ezzat Kotb

Dr. Ezzat Abd El- Mohsen Kotb Aly 14 El Karakat street , Abou Zaabal El balad, El Khanka, Kalubya , Egypt. Soil and Water Research Department, Nuclear research Center, Atomic Energy Authority, Egypt. Mobile : 010(90906712) & 011(14131898) E. mail : Ezzatkotb2000@yahoo.com