N’cho, C. O., Lesueur, D. . and Yusuf, A. A. (2015) “Combined Microbial Inoculation as a Promising Approach to Enhance Promiscuous Soybean Nodulation and Nitrogen Content in Sudan Savanna”, International Journal of Sustainable Agricultural Research, 2(3), pp. 86–97. doi: 10.18488/journal.70/2015.2.3/70.3.86.97.