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Question
______ are formed by the decomposition of rocks, removal of bases and silica, and accumulation of iron oxide and aluminium oxide.
A.
Desert soils
B.
Black cotton soils
C.
Alluvial soils
D.
Lateritic soils
Answer ( Option D)

Lateritic soils

Solution

Laterite soils are mostly the end products of weathering.
• They are formed by the decomposition of rocks, removal of bases and silica, and accumulation of iron oxide and aluminium oxide.
• Heavy rainfall promotes leaching (nutrients gets washed away by water) of soil whereby lime and silica are leached away, and some soil rich in oxides of iron and aluminium compounds is left behind.
The chemical composition of Laterite-Lateritic soils
• Laterite soils are rich in bauxite or ferric oxides.
• They are very poor in lime, magnesia, potash and nitrogen.
The economic value of Laterite-Lateritic soils
• Laterite and lateritic soils provide valuable building material.
• These soils can be easily cut into cakes but hardens like iron when exposed to air.

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