Kawedo, Elvis, Godspower Omokaro, and Kolawole Edomwonyi Law-Ogbomo. “Effect of Spent Engine Oil Pollution and Liquid Organic Fertilizer Application on Soil Chemical Properties and Nutrient Contents of Maize (Zea Mays)”. Sustinere: Journal of Environment and Sustainability 8, no. 1 (May 20, 2024): 16–28. Accessed July 4, 2024. https://sustinerejes.com/index.php/a/article/view/358.