SOIL RESOURCE INVENTORY USING REMOTE SENSING AND GIS FOR KENGAKI MINI-WATERSHED OF CHAMARAJANAGAR DISTRICT, KARNATAKA
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Date
2016-03-03
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU
Abstract
Characterization and evaluation of soils for capability, irrigability and crop
suitability was carried out in Kengaki mini-watershed of Chamarajanagar district,
Karnataka using remote sensing and GIS techniques. The study area has semi-arid
climate with average annual rainfall of 799.3 mm. Nine pedons representing the entire
study area were studied for morphological and physicochemical properties. The soils
were loamy sand to clay in texture, shallow to very deep in depth, dark yellowish brown
to red in colour, slightly acidic to strongly alkaline in reaction, low to medium in organic
carbon status. Based on the characters, soils were classified as Typic Rhodustalfs, Ultic
Haplustalfs, Typic Haplustepts, Vertic Haplustepts. Soils of Thammadihalli,
Kumachahalli-2 and Kengaki-2 series were classified under land capability class IIes,
Shyanandrahalli-1, Kumuchahalli-1, Kumuchahalli-3 Kengaki-1, Shyanandrahalli-2 soils
were under IIIes and Lakkuru soils were classified under IVes. Soils of Thammadihalli,
Kengaki-2, and Kumachahalli-2 series were classified under soil irrigability class 2 with
the moderate limitations, Shyanandrahalli-1, Kumuchahalli-1, Kumuchahalli-3 and
Shyanandrahalli-2 series were classified under class 3 with severe soil and topography
limitations. Soils of Kumuchahalli-2 series were highly suitable for the cultivation of
sorghum, tomato, cotton and coconut whereas soils of Kumuchahalli-3 series were highly
suitable for the cultivation of sorghum and tomato without any limitations. Based on the
information obtained from the thematic maps and soil data, the soils were divided into
four groups and for which alternate land use options were suggested.
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