E. Y. Mohammed, O. A. Yousef, A. A. Yousef, and A. O. Mahgoub, “Analytical Study of Factors Affecting Wheat Production in Gezira scheme, Sudan (1991- 2015)”, JEALS, vol. 4, no. 2, pp. 135–122, May 2020, doi: 10.26389/AJSRP.S101119.