"Response of Sugarcane (Saccharum spp.) to Urea and Methods of Application in some Soils in the Central Clay Plain of Sudan*" (2025) University of Khartoum Journal of Agricultural Sciences, 17(2). موجود في: https://onlinejournals.uofk.edu/uofkjas/article/view/1976 (تاريخ الوصول: 25 مايو 2026).