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B
Good plant covers
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C
Both a and b
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D
None of these
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Solution
The correct option is B Good plant covers
Soil erosion is the loss of top fertile layer of
soil either by wind or by water.
India is facing this problem in many
parts. The area affected by soil erosion is 5, 00,000 square kilometres. It
adversely affects productivity and economy of the country.
There are many techniques to prevent soil erosion. But important step is
to increase planting of trees or afforestation.