SOIL ACIDITY LEVELS UNDER DIFFERENT LAND USE SYSTEMS AND LIME REQUIREMENTS FOR THE DOMINANT SOIL TYPE OF SODO DACHI DISTRICT, OROMIA NATIONAL REGIONAL STATE, ETHIOPIA

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Abstract:

Soil acidity is one of the main factors affecting agricultural productivity in the highlands of Ethiopia. It is one of the problems that decrease the potential of arable lands for crop growth because of high rainfall in highland areas. The purpose of this study was to assess and quantify the extent of soil acidity under different land use systems and to determine the amount of lime required for neutralizing soil acidity in the study area. Three land uses (cultivated, grazing and natural forest lands) and two soil depths (0-20 and 20-40 cm) of dominant Cambisol were considered for this study. A total of 36 composite samples were collected for laboratory analysis. The samples collected from the different land use systems were analyzed and the recorded data were subjected to GLM (General Linear Model) procedure using SAS. The results revealed that the soil textural classes of the study area were sandy loam and sandy clay loam with high contents of sandy fraction. The soil pH (H2O) of the study area was in range 4.56-6.45 with very strongly acid, strongly acid, moderately acid and slightly acid. The OM was significantly (p

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SOIL ACIDITY LEVELS UNDER DIFFERENT LAND USE SYSTEMS AND LIME REQUIREMENTS FOR THE DOMINANT SOIL TYPE OF SODO DACHI DISTRICT, OROMIA NATIONAL REGIONAL STATE, ETHIOPIA

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