"Effect of Water Stress and Cutting Frequency on Alfalfa (Medicago Sativa L.) Seed Production*". University of Khartoum Journal of Agricultural Sciences 17, no. 3 (مارس 28, 2023). تاريخ الوصول مايو 25, 2026. https://onlinejournals.uofk.edu/uofkjas/article/view/1935.