1. AOAC, 1990. Official Methods of Analysis 15th ed. Association of Official Analytic Chemists. AOAC. (Arlington, USA).
2. Bogale, S., Melaku, S. and Yami, A., 2008. Potential use of crop residues as livestock feed resources under conditions of smallholder farmers in the Bale highlands of Ethiopia. Tropical and Subtropical Agroecosystems, 8, 107–114
3. Castrillo, C., Funderella, M., Guada, J.A. and deVega, A., 1995. Effect of ammonia treatment and carbohydrate supplementation on the intake and digestibility of barley straw diets by sheep. Animal Feed Science and Technology, 51, 73–85. doi: 10.1016/0377-8401(95)00682-D
4. CTA, 1992. Ruminant Nutrition. The Tropical Agriculturalist, CTA Publication.
5. Getachew, G., Said, A.N. and Sundstøl, F., 1994. The effect of forage legume supplementation on digestibility and body weight gain by sheep fed a basal diet of maize stover. Animal Feed Science and Technology, 46, 97–108. doi: 10.1016/0377-8401(94)90068-X