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Why can soil near a river become enriched by repeated new layers?

Answer and explanation

Correct answer: Due to regular deposition of silt carried by the river

During floods, a river deposits fine silt (alluvium) carried by it on nearby plains. Repeated deposition can add fresh minerals and nutrients to the soil, making it fertile. Evaporation of river water does not form new soil layers. Exam tip: Connect fertile floodplains with the deposition of alluvium by rivers.

Related tags

DrainageRiversAlluviumSoil FertilityFloodplainsDepositionRole Of RiversGeography

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