Dalhatu, A. K., A. A. Khan, and Z. D. Umar. “Study of Root-Knot Problems in Ajiwa Dam Area, Katsina State, Nigeria”. International Journal of Environment 4, no. 1 (February 22, 2015): 204–209. Accessed November 21, 2024. https://nepjol.info./index.php/IJE/article/view/12189.