Siraj Kelil Gobelle
Department of Agroforestry, Oromia Agricultural Research Institute, Yaballo Pastoral and Dryland Agriculture Research Center, P. O. Box 85, Yaballo, Ethiopia.
Department of Forestry, Hawassa University, Wondo Genet College of Forestry and Natural resource, P. O. Box 128, Shashemene, Ethiopia.
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