Geochemical Interpretations of Laterite Associated Soils of East Coast Andhra Pradesh
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Title |
Geochemical Interpretations of Laterite Associated Soils of East Coast Andhra Pradesh
Not Available laterite associated soils |
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Creator |
Bhaskara Phaneendra Bhaskar1* and Gopal Tiwari2
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Subject |
Ferruginous soils, Nellore schist belt, Somasila project, Weathering indices
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Description |
Not Available
Six representative laterite associated soils on peneplains of somasila project area of Nellore district, Andhra Pradesh of archean age schists under hot semiarid climate were studied to trace out pedogenic characteristics limiting crop production. The morphology of these soils showed that a distinct dark yellowish red to red matrix with hue 7.5YR in Allimadugu (P1) to red with hue 2.5YR in Venkateshwara Palem(P2) with increasing intensity of redness and clay in B horizons. These soils were assessed as easily susceptible to erosion as evidenced with increasing trends of silt to clay ratio, structural stability index and the molar ratio’s of silica to sesiquioxide ratio more than 2. The chemical balance sheets constructed using silica as invariant and the results showed that there is a considerable gain of iron, aluminium oxides and substantial losses of Ca, Mg and K oxides in the genetic B horizons. These soils were classified in the subgroups of Entisols, Inceptisols and Alfisols considering clay illuviation, per cent base saturation, lithic contact and ustic soil moisture regime. The ratio of dithionite iron to total iron showed high degree of lateritization in relation to field morphology but yielded poor relation with weathering indices such as MPWI (modified product weathering index), chemical index of alteration (CIA) and Parker index (PI). These slightly acid to neutral soils were evaluated as marginally suitable for ground nut, and sorghum with poor status of carbon to nitrogen ratio( Not Available |
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Date |
2020-05-20T02:30:18Z
2020-05-20T02:30:18Z 1001-01-01 |
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Type |
Research Paper
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Identifier |
Not Available
Not Available http://krishi.icar.gov.in/jspui/handle/123456789/35837 |
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Language |
English
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Relation |
Not Available;
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Publisher |
Not Available
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