C. N. Mbah, J. N. Nwite, C. Njoku and I. A. Nweke
Department of Soil Science and Environmental Management, Ebonyi State University, P. M. B. 053, Abakaliki,
Ebonyi State, Nigeria.
&
Department of Crop and Horticulture, COOU, Uli, Anambra State, Nigeria.