“Determination of Phosphorous Fixation Capacity on Alluvium, Sandstone and Shale Soils of Akwa Ibom State, Nigeria”.
International Journal of Sustainable Agricultural Research 8, no. 2 (April 12, 2021): 105–113. Accessed November 2, 2026.
https://archive.conscientiabeam.com/index.php/70/article/view/325.