Soil Mineralogy of Kavalur Sub-Watershed (4D4A2P) of Koppal District, North Karnataka

The soils of Kavalur sub watershed of Koppal district, Karnataka are inherited from granite-gneiss under semi-arid climate at an average elevation of 463.27 m above mean sea level. The mineralogical composition of these soils was investigated using X-ray diffraction technique. The soil samples of tw...

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Bibliographic Details
Published inEnvironment and ecology Vol. 41; no. 1; p. 160
Main Authors Anjali, M C, Hebbara, Manjunatha, Patil, P L
Format Journal Article
LanguageEnglish
Published Kalyani MKK Publications 01.01.2023
Subjects
Arid climates
Clay
Clay minerals
Clay soils
Composition
Gneiss
Horizon
Kaolin
Mica
Mineralogy
Minerals
Quartz
Semiarid climates
Smectites
Soil depth
Soil investigations
Soil mineralogy
Watersheds
X-ray diffraction
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Summary:The soils of Kavalur sub watershed of Koppal district, Karnataka are inherited from granite-gneiss under semi-arid climate at an average elevation of 463.27 m above mean sea level. The mineralogical composition of these soils was investigated using X-ray diffraction technique. The soil samples of two depths of nine pedons belonging to different soil series were subjected to mineralogical studies to assess their mineralogical composition. These nine pedons represented both red (GHT and MRD series) and black (BDR, AWD, KVR, RNK, MTL, BGP and DL-7 series) soils pedons. In case of clay mineralogy of red soil pedons, the kaolin (indicative of mixed mineralogy) was dominant among secondary clay minerals followed by smectite in the Ap horizon. In the Bt horizon, smectite was dominant followed by kaolin. In addition to secondary minerals, clay sized particles also contained primary minerals like mica, quartz and feldspar. Red soil pedons had more kaolin content than black soil pedons and its content decreased with depth. In contrast, smectite content was quite low and its content increased with depth. The black soil pedons showed relatively higher content of smectite than kaolin. The other mineral present was quartz. In most of the black soil pedons, smectite content increased while kaolin and quartz content decreased with soil depth.
ISSN:0970-0420