Nnachi, S.U., Sawa, B.A., Ikpe, E., Philemon, A.C., and Balogun, S.E. 2016. “Comparison in Trend Analysis of Annual Rainfall Variability on Grain Yield Pattern in Gusau Station, Zamfara State, Nigeria”. International Journal of Science for Global Sustainability 2 (1):12. https://www.fugus-ijsgs.com.ng/index.php/ijsgs/article/view/274.