Birhanu , B., Animut, G. and Urge, M. 2013. Effect of Green Prosopis juliflora Pods and Noug Seed (Guizotia Guizotia obissynica) ) Cake Supplementation on Digestibility and Performance of Blackhead Ogaden Sheep Fed Hay as a Basal Diet. Science, Technology and Arts Research Journal. 2, 2 (Jun. 2013), 38–47.