G.A. Abubakar, B.O. Ocheni, A.I. Gabasawa 1Department of Soil Science and Land Resources Management, Faculty of Agriculture, Usmanu Danfodiyo University, Sokoto, Nigeria 2Department of Soil Science, Institute for Agricultural Research, Faculty of Agriculture, Ahmadu Bello University,

C.M. Ahukaemere1, D.N. Osujieke2, V.O. Ugwa1, A.O. Ogwuche1 1Department of Soil Science and Technology, Federal University of Technology, PMB 1526 Owerri, Imo State, Nigeria 2Department of Soil Science and Land Resources Management, Federal University Wukari, PMB 1020 Wukari, Taraba S