Ubani, S.C., Chukwudi, O., Okpashi, V.E., Osuji, C.A. and Ugochukwu, N.G. 2017. Palm Oil Mill Effluent Effect on soil fertility: a longitudinal assessment of Zea mays plant. EQA - International Journal of Environmental Quality. 23, 1 (Jan. 2017), 43–53. DOI:https://doi.org/10.6092/issn.2281-4485/7135.