Which soil-forming process, involving the mixing of stratified alluvium by earthworms, is the most important in Pakistan’s alluvial plain?
Correct answer C. Homogenization
Explanation
Earthworm activity mixes the thin sedimentary layers of fresh river deposits, erasing stratification and creating a uniform profile. This homogenisation is regarded as the dominant soil-forming process on the young alluvium of Pakistan's plains.
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