Question

what is the composition of red soil

Answer 1

Red soil is rich in iron oxide, but deficient in nitrogen and lime. Its chemical composition generally includes non-soluble material 90.47%, iron 3.61%, aluminium 2.92%, organic matter 1.01%, Magnesium 0.70%, lime 0.56%, carbon di-oxide 0.30%, potash 0.24%, soda 0.12%, phosphorus 0.09% and nitrogen 0.08%.

Answer 2

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Red soil is rich in iron oxide, but deficient in nitrogen and lime. Its chemical composition generally includes non-soluble material 90.47%, iron 3.61%, aluminium 2.92%, organic matter 1.01%, Magne­sium 0.70%, lime 0.56%, carbon di-oxide 0.30%, potash 0.24%, soda 0.12%, phosphorus 0.09% and nitrogen 0.08%.

Its colour is mainly due to ferric oxides occurring as thin coatings on the soil particles while the iron oxide occurs as haematite or as hydrous ferric oxide, the colour is red.

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