Nazar Nasreldeen Babiker Elnesairy
Department of Soil and water, Faculty of Agriculture, Sabha University, P. O. Box 18758, Sabha, Libya
Faculty of Agricultural Sciences, University of Gezira, P. O. Box 20, Wad Medani, Sudan
Jamal Abubaker
Department of Soil and water, Faculty of Agriculture, Sabha University, P. O. Box 18758, Sabha, Libya
Hashim Mahmod
Department of Microbiology, Faculty of Agriculture Sciences, Wad Medani Ahlia University, P. O. Box 402 , Wad Medani, Sudan