M.M., Alsamowal, Hadad M.A, Mohammed .M.A, and Elhassan4G.A. “In Vitro Study the Characterization of Azotobacter Spp. Isolates from Sudanese Soils”. IJRDO-Journal of Agriculture and Research (ISSN: 2455-7668) 2, no. 6 (June 30, 2016): 47-56. Accessed November 22, 2024. https://ijrdo.org/index.php/ar/article/view/76.