B. Tarfa, I. Kureh, A.Y. Kamara and DN. Maigida
Journal of Agronomy 5 ( 2 ): 362 - 368 , 2006
I.Y. Dugje, A.Y. Kamara and L.O. Omoigui
Journal of Agronomy 7 ( 1 ): 33 - 40 , 2008