Geography • Physical GeographyMedium
What is the primary factor responsible for the formation of laterite soils, which are extensively found in the midland regions (Idanad) of Kerala?
A. Accumulation of wind-blown loess deposits in arid conditions
B. Alternate wet and dry tropical climatic conditions causing intense leaching of silica✓ Correct Answer
C. Deposition of rich alluvial silt by perennial Himalayan river systems
D. Accumulation of organic peat under cold, waterlogged sub-polar environments
💡 Solution & Explanation
Laterite soils develop under tropical climatic conditions characterized by alternate wet and dry seasons, which promote intense leaching where soluble silica is washed away while insoluble iron and aluminum oxides remain behind. These soils are typical of regions with high heavy rainfall coupled with high temperatures, such as parts of Kerala, Karnataka, and Odisha. Unlike alluvial soils deposited by river action, lateritized profiles are acidic and generally low in fertility.
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