Ngoe Mukete

College of Economics and Management, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, Jiangsu Province, China

Jing Zhu

College of Economics and Management, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, Jiangsu Province, China

Mukete Beckline

School of Forestry, Beijing Forestry University, 35 Qinghua Dong Lu, Haidian District Beijing, 100083 China

Tabi Gilbert

College of Economics and Management, Nanjing Agricultural University, 1 Weigang, Nanjing 210095, Jiangsu Province, China

Kimengsi Jude

Department of Economics and Management, University of Buea, Box 63 Buea, South West Region, Cameroon

Aniah Dominic

Farmer Training Centre, Box 763, Bolgatanga 038 20, Ghana