Mohammed A.M. Elhaj Omdurman Islamic University, Omdurman Sudan
Azhari O. Abdelbagi University of Khartoum, Khartoum North Sudan
Mahdi A. Ahmed Shambat Research Station, Agricultural Research Corporation, Khartoum North Sudan
Mohammed E.E. Mahmoud Kassala and Gash Research Station, Agricultural Research Corporation, Kassala State Sudan