IMPACT OF PARKLAND FAIDHERBIA ALBIDA DELILE A.CHEV AND CORDIA AFRICANA LAM TREES ON SELECTED SOIL PROPERTIES AND SORGHUM YIELD IN FEDIS DISTRICT, EAST HARARGHE ZONE, OROMIA, ETHIOPIA

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Abstract:

Among several agroforestry practices in the east Hararghe of Ethiopia, Parkland agroforestry practices are common. However, the beneficial effect of tree species on soil properties is very scarce to be used for improved agricultural productivity in the eastern part of the country including study area. Therefore, the study was conducted with the objectives of investigating the impact of parkland trees on the soil physical and chemical properties within and outside the trees canopy; the vertical and horizontal soil fertility gradients as influenced by the tree species and the effects of trees on yields of sorghum (biocolar) in Fedis District, Oromia, Ethiopia. Accordingly, six isolated and nearly similar F. albida and C. africana trees of each species growing on similar site conditions were selected and the canopy coverage of each tree was divided into four radial transects. Radial distance-based soil sampling (under the canopy, edge to canopy, and far from canopy) was used and composite soil samples from three horizontal distances with two soil depths were collected for analysis of soil physical and chemical properties. Three plots from the tree trunk were also established for assessing the sorghum yields. The result revealed that lower soil bulk density was observed under tree canopy than open field(p

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IMPACT OF PARKLAND FAIDHERBIA ALBIDA DELILE A.CHEV AND CORDIA AFRICANA LAM TREES ON SELECTED SOIL PROPERTIES AND SORGHUM YIELD IN FEDIS DISTRICT, EAST HARARGHE ZONE, OROMIA, ETHIOPIA

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