The study was conducted in the â€œCenter for Indigenous Trees Propagation and Biodiversityrndevelopment in Ethiopiaâ€. This thesis presents analysis of the contribution of Acacia abyssinicarnfor the restoration of the threatened Juniperus procera. The general purpose of the study was tornexamine the role of A. abyssinica in the restoration of the threatened J. procera on degraded andrnbare landscape. To achieve this objective, different size sampling plots were used for both treernand soil data collections, along the systematically laid transect lines. Accordingly, a total of 24rnsampling plots were constructed, inside each sample plot, the growth parameters, viz. tree height,rnd.b.h, crown length, crown diameter, branch numbers, branch length and status of soilrnphysicochemical properties in the two sub-sites was recorded and examined. The growthrnpotential of the studied tree was analyzed. The findings of the study revealed that the meanrngrowth difference of J. procera in the two sub-sites was significant (p < 0.05) and its growthrnpotential in all parameters was considerably higher in A. abyssinica influenced sub-site than therncontrol sub-site. The results showed that the presence of A. abyssinica were paramount importantrnfor the restoration of the endangered J. procera. The soil analysis result revealed that there isrnsignificant mean difference (p < 0.05) for soil organic carbon, total nitrogen and soil textures inrnthe two soil depths and across the two sub-sites. Total nitrogen, organic carbon, EC, availablernphosphorus and CEC except soil pH were decreased with increasing soil depths which is anrnindication of surface soil fertility restoration. Soil fertility was different across the two sub-sites.rnThis might be due to either the presence or absence of nitrogen fixing as well as necromassrnproduction of A. abyssinica. The significance of the study was to provide a basis for furtherrnrestoration studies that contributes towards restoration, protection, regeneration and conservationrnof useful endangered tree in particular and biodiversity in general.rnKeywords: Restoration, nitrogen fixation, growth performance, J. procera, Soil fertility.