2018. The Contribution of Agro forestry System to Tree Biodiversity Conservation and Rural Livelihood: The Case of Lay Armachiho District, Gondar, Ethiopia. International Journal of Scientific Research and Management (IJSRM). 6, 05 (May 2018), AH–2018. DOI:https://doi.org/10.18535/ijsrm/v6i5.ah02.