1. Department of Soil and Environmental Management, Faculty of Agriculture and Natural Resources Management, Ebonyi State University, Abakaliki, Nigeria
2. Department of Agronomy and Ecological Management, Faculty of Agriculture, Enugu State University of Science and Technology, Agbani-Enugu, Nigeria
3. Department of Agriculture, Federal College of Education, Obudu, Cross River State, Nigeria
4. Department of Crop and Soil Science, Faculty of Agriculture, University of Port Harcourt, Rivers State, Nigeria