Bernard Palmer Kfuban Yerima Editor

Chukwuemeka Christopher Opara was Lecturer in the Department of Soil Science and Technology in the School of Agriculture and Agricultural Technology at the Federal University of Technology, Owerri (Nigeria) until his early death in 2010.
Bernard Palmer Kfuban Yerima is Professor of Soil Science in the Department of Soil Science, Faculty of Agronomy and Agricultural Science at the University of Dschang (Cameroon).