Abdelaziz, 2008. Doct. dissert. Ph. D, Faculty of Agriculture University of Khartoum, 90 pp.

Abdelaziz, A. A., 2008. Effect of some management practices on desertified rangelands at Sinnar State, Sudan. Doct. dissert. Ph. D, Faculty of Agriculture University of Khartoum, 90 pp.