Department of Agricultural Economics and Extension, Faculty of Agriculture, University of Abuja, Gwagwalada-Abuja, Federal Capital Territory, Nigeria (1)
Department of Agricultural Economics and Extension Services, Faculty of Agriculture, Ibrahim Badamasi Babangida University, Lapai, Niger State, Nigeria (2) 
Federal College of Forestry Mechanization, Department of Agricultural Extension and Management, Forestry Research Institute of Nigeria, Afaka-Kaduna, Kaduna State, Nigeria (3)