Please use this identifier to cite or link to this item: http://krishikosh.egranth.ac.in/handle/1/5810102738
Authors: HARSHITHA M.
Advisor: S.L. BUDIHAL
Title: STUDIES ON MINERALOGY OF ASSOCIATED RED AND BLACK SOILS OF NORTH KARNATAKA
Language: en
Type: Thesis
Agrotags: null
Abstract: “STUDIES ON MINERALOGY OF ASSOCIATED RED AND BLACK SOILS OF HUTTI SCHIST BELT, NORTH KARNATAKA” HARSHITHA M. 2012 S.L. BUDIHAL MAJOR ADVISOR ABSTRACT The associated red and black soils were studied horizon wise in the Hira region of the Hatti schist belt. Chemical and mineralogical properties were studied to understand their associated occurrence and their formation. Clay and sand fractions were separated and mineral composition was identified by XRD. The structures of the associated black and brown pedons were predominantly sub-angular blocky. The texture was clay throughout the profile in both soils. The clay content increased whereas sand content decreased with depth. The pH of both soils was neutral to slightly alkaline. Dithionate extractable free iron oxides and sodium carbonate extractable Al and Si in the soils were determined. Free iron oxides were more in brown soil compared to black whereas Na2CO3 extractable silicon and aluminium was more in black soils compared to brown soils. In case of clay mineralogy; smectite was overwhelmingly dominant mineral in both the soils with the traces of kaolinite. The ethylene glycol solvation showed the presence of interstratified minerals such as smectite-chlorite in these soils. In the case of sand minerals, quartz was the most dominant mineral in these soils followed by feldspars, olivines and amphiboles. In the present study, the clay mineralogy was same in both the black and brown soils and also little difference in the light sand fraction mineralogy. But some of the chemical properties such as free iron oxides, Na2CO3 extractable free silica and aluminium maybe used to differentiate their formations. In case of black soil, free silicon and aluminium get accumulated whereas in brown soils the free iron oxides were more, probably due to more leaching. Even when the soils are formed from the same parent material, the differences in other external factors, such as leaching, appears to have resulted in the formation of two different soils.
Description: STUDIES ON MINERALOGY OF ASSOCIATED RED AND BLACK SOILS OF NORTH KARNATAKA
Subject: Soil Science and Agriculture Chemistry
Theme: STUDIES ON MINERALOGY OF ASSOCIATED RED AND BLACK SOILS OF NORTH KARNATAKA
Research Problem: STUDIES ON MINERALOGY OF ASSOCIATED RED AND BLACK SOILS OF NORTH KARNATAKA
These Type: M.Sc
Issue Date: 2012-08-12
Appears in Collections:Thesis

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