Contour bunding is a method of soil conservation used in
Adesert margins, liable to strong wind action
Blow flat plains, close to stream courses, liable to flooding
Cscrublands, liable to spread of weed growth
Correct Answer: Option D
Explanation
1. Contour bunding is a soil conservation technique specifically designed for sloping lands.
2. It involves constructing small earthen embankments or bunds along the contours (lines of equal elevation) of the slope.
3. The primary purpose is to break the force of water runoff down the slope, prevent soil erosion caused by water, and increase water infiltration into the soil.
4. Option (A) describes conditions where windbreaks or shelterbelts are used for soil conservation against wind action, not contour bunding.
5. Option (B) describes conditions of low flat plains prone to flooding, where flood control measures or drainage might be needed, but contour bunding is irrelevant as there are no significant slopes.
6. Option (C) describes scrublands, where managing weed growth might be a concern, but this is unrelated to the function of contour bunding.
7. Since contour bunding is specifically used on sloping lands to combat water erosion, and none of the options describe this primary application, 'None of the above' is the correct answer.
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