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Q.

Contour barriers are used in which area to prevent soil erosion? 
 

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a

Scrub lands, liable to spread of weed growth

 

b

None of the above
 

c

Desert margins, liable to strong wind action
 

d

Low flat plains, close to stream courses, liable to flooding
 

answer is D.

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Detailed Solution

  • A contour barrier technique for soil and water conservation is used in hilly areas.
  • Contour barriers are contour strips that intercept descending waters and ground particles. 
  • This makes it possible to reduce the flow of water along the slope. 
  • A long-term benefit of barriers is that the soil tends to build up behind them, creating a terrace effect.
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