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Clay mineralogy of groundnut growing soils formed on different parent material of Srikalahasti Division of Chittoor district, Andhra Pradesh, India

Mineralogy of clay fractions and characteristics of Groundnut growing soils developed from granite-gneiss parent material in Srikalahasti division in Chittoor district of Andhra Pradesh were studied. The clay fraction of these soils exhibited the characteristic peaks of smectite, illite and kaolinite. Semi-quantification of clay fractions based on relative areas under corresponding peaks indicated that the pedon 3 and 6 was dominated by kaolinite followed by illite, smectite and Quartz. Pedons 1 and 2 were dominated by smectite followed by kaolinite, illite and Quartz whereas Pedon 5 was dominated by smectite followed illite, kaolinite and Quartz. Pedon 4 dominated by illite followed by kaolinite, smectite and feldspars. | Clay mineralogy of groundnut growing soils formed on different parent material of Srikalahasti Division of Chittoor district Andhra Pradesh India