MP, W., O. L, E. I, R. R, O. BA, B. KO, and K.-A. E.J. “Impact of Nitrogen Fertilizer Use on Soil Ecosystem Integrity in the Greater Port Harcourt Region, Nigeria”. Open Academic Journal of Advanced Science and Technology, vol. 5, no. 1, Aug. 2021, pp. 1-12, doi:10.33094/5.2017.2021.51.1.12.