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Although the problem of soil erosion is common in all countries, it is one of the more persisting hazards in developing countries like Ethiopia which is a country located in tropic where there is higher precipitation and is vulnerable to almost all forms of environmental degradation which is also resulted from poor resource conservation practices. The main objective of this study is to determine soil erodibility and susceptibility to soil erosion in Shonkola mountainous area, Soro district. To determine soil erodibility and susceptibility to soil erosion, the percentage of primary soil separates (silt, very fine sand, and clay); percentage of organic matter; soil structure classes; and soil permeability were estimated. Soil samples were collected from 56 locations at an average depth of 15 cm to employ soil texture nomograph. Thus, soil erodibility of Shonkola area is determined and mapped to envisage the area that is highly susceptible for soil erosion. The soil erodibility value ranges from 0.01426 to 0.04001. It was found that the soil erodibility increases as organic content decreases, soil texture becomes finer and less permeable, and structure becomes poor. Prediction of soil erodibility and susceptibility to soil erosion is of great importance for soil erosion quantification, using GIS. The farm-unit level identification of soil types and existing specific problems are crucial in planning and implementation of any soil management strategies.

SOIL ERODIBILITY AND SOIL SUSCEPTIBILITY TO EROSION BY WATER IN SHONKOLA MOUNTAINOUS AREA OF SORO DISTRICT, ETHIOPIA