“Effect of Soil Textural Classes on the Biological Nitrogen Fixation by Bradyrhizobium Measured by 15N Dilution Analysis”. Baghdad Science Journal 13, no. 4 (January 14, 2025): 0734. Accessed March 8, 2025. https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/2313.