Masters of Science

URI for this collectionhttps://rps.wku.edu.et/handle/987654321/9

Browse

Filter results by typing the first few letters
Now showing 1 - 1 of 1
  • No Thumbnail Available
    Item
    MAPPING THE SPATIAL VARIABILITY OF SOIL ACIDITYANDEVALUATION OF PHYSICO-CHEMICAL SOIL PROPERTIES:- INCASEOF DEWOSHE SUB-WATERSHED, GUMMER DISTRICT, GURAGEZONE , ETHIOPIA
    (WOLKITE UNIVERSITY, 2022-06) MULUYE TAFERE DEMIS
    Mapping the spatial variability of soil acidity and evaluation of physico-chemical soil properties on the study area is important to design appropriate soil fertilitymanagement practices. Mapping the spatial variability is a key operation as it provides knowledge about soil acidity and how it can be used sustainably. The studywas conducted at the Dewoshe sub-watershed Gummer district, Guraghe Zone, SNNPR, Ethiopia. Twenty-eight soil samples were collected from two crop types withseven replication at two soil depths (0–20 and 20–40 cm), respectively. Theevaluation of physico-chemical soil properties were analyzed using the ANOVAGLMprocedure of SAS software, and mapping the spatial variability of soil acidity wereanalyzed using Arc GIS 10.4. Furthermore, the study has investigated that variousphysico-chemical soil properties were profoundly influenced due to crop types andsoil depths. Soil BD, total porosity, and exchangeable acidity, TN, OM, and C: N, available P, exchangeable Mg, CEC, and exchangeable acidity were significantly ected due to Enset and cereal crops, soil depths, and their interaction between croptypes and soil depths. In contrast, sand, silt, and clay fraction and change of pHexhibited no statistically significant variation within the crop and their interaction between crop types and soil depths. But there was a variation of sand and clay on soil depths. Exchangeable (K, Na, and H) were only varied in crop types. The change of pH, exchangeable Al, and Ca were varied within crop types, soil depths, and their interaction between crop types and soil depths and only within crop types and soil depths, respectively. The highest and the lowest values of some physico-chemical soil properties of sand, clay, BD, total porosity, pH-H2O, pH-KC, OM, TN, available P, and CEC were (38.9, 34.4 ), (23.07, 19.4), (1.35, 1.07), (59.7, 49), (6.27, 4.84), (5.67, 4.1), (4.58, 0.79), (0.26, 0.07), and (28.6, 15.6) within cop types, and soil depths respectively. Cereal crop fields as compared to the Enset crop fields were sufere from soil degradation and decline in soil fertility on the spatial points of beginning at strong to steep slope mapping parts with the same soil depths. But both in the study area, in general, pointed out that these changes are not in favour of the ecosystem and caused deterioration in the quality of soil resources which in turn led to a decline in agricultural crop productivity. This calls for urgent measures to be takenthat encompass a mix of technological and policy options. Further research and development interventions into the dynamics and impact of crop land-use change onecosystems and their components at various scales (from small sub-watersheds toregion and country) are required if conservation and agricultural development goalsfor this sub-watershed in particular and the country in general, are to be met onasustainable basis. And again, mapping the spatial variability of soil acidic problemsby OK is needed to clearly show the specific locations of the study areas, whereattention is required with respect to sustainable management of crop nutrients.