Amelioration of Spent Oil Contaminated Ultisol with Organic Wastes and its Effect on Soil Properties and Maize (Zea mays L) Yield

C.N. Mbah, J.N. Nwite and I.A. Nweke
Department of Soil and Environmental Management, Ebonyi State University, Abakaliki, Nigeria

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Dpepartment of Crop Science and Horticulture, Anambra State University Uli, Nigeria