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Why is soil erosion relatively less in dense forests as compared to barren, open fields? - Science

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Question

Why is soil erosion relatively less in dense forests as compared to barren, open fields?

Answer in Brief

Solution

In dense forests, the tree cover (canopy) prevents rainwater from directly falling on the forest floor/soil. The canopy layer of for¬est intercepts the flow of raindrops so that rainwater falls on the leaves of trees and then drips slowly onto the forest floor. Thus, forests allow rainwater to seep. Also, roots of the veg¬etation bind the soil particles and hold them firmly. This protects the topsoil and prevents it from getting eroded by wind or water. But in barren, open fields the soil is exposed to the wind and falling rain. The soil particles become loose and easily get carried away by blowing wind or flow of water. Hence, soil erosion is relatively less in dense forests as compared to open barren fields.

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Chapter 9: Soil - LONG ANSWER QUESTIONS [Page 50]

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NCERT Exemplar Science [English] Class 7
Chapter 9 Soil
LONG ANSWER QUESTIONS | Q 17. | Page 50
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