الفهرس 
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Abstract
My great thanks to Almighty ALLAH, the most Beneficial and the most Merciful for.
I wish to express my sincere thanks, appreciation and gratitude to Prof. Dr. Salah Mohamed Mahmoud, Professor of soil Microbiology, Fac. of Agric., Assiut Univ.
and Chairman of Supervisory Committee for suggesting the problem, valuable
guidance, inspire help and gave valuable helps thought the course of this
investigation and preparation the manuscript.
Grateful appreciation and indebtedness are extended to Dr. Mohammed Tawfik Abbas, Associate Professor and head of Agricultural Microbiology Department, Fac. of Agric., Aswan Univ. and Prof. Dr. Wafaa Mohamed Abd El-Rahim, Professor of
Agricultural Microbiology, Department of Agricultural Microbiology at National Research Centre, Giza for his supervision and valuable advice criticism during the course of this
study and preparation the manuscript.
Thanks a lot and gratitude are also to Dr. Hanan Hassan Youssef, a senior researcher at the Environmental Studies and Research Unit (ESRU), Faculty of Agriculture, Cairo University. for supervision valuable guidance and gave valuable help through the preparation of this manuscript.
Thanks, should also go to Islam Mostafa Yaseen assistant lecturer at institute of African research and studies and Nile basin country, Aswan University, Muhammad Khaled Hussein graduated student from Biotechnology Department, Faculty of Agriculture and Natural Resources, Aswan University and Ahmad Morad graduated student from Biotechnology Department, Faculty of Agriculture and Natural Resources, Aswan University For all the help they gave me during my practical experiments.
Last, I wish to take this opportunity to extend my deep thanks and appreciation to
for the owner of the first prayer and support my father, mother, wife, son, brothers,
my students, friends and people for their patience, encouragement and helping me
to complete this study.