Question

Biological control of wind erosion is

• A. Strip cropping
• B. Contour bunding
• C. Graded bunding
• D. Ridge and furrow system

Hint:

Wind erosion control:
- Biological: Strip cropping, Shelterbelts.
- Mechanical: Contour bunding, Graded bunding.
- Biological methods use vegetation to reduce wind speed.

Answer 1

The Correct Option is A

Step 1: Understanding the Question:
This question tests knowledge of biological methods for controlling wind erosion.

Step 2: Detailed Explanation:
Strip cropping (A) is a biological control method for wind erosion.
It involves growing crops in strips along the contour or perpendicular to the wind direction.
The strips act as barriers to reduce wind speed and trap soil particles.
Other options:
- Contour bunding (B): Mechanical method for water erosion.
- Graded bunding (C): Mechanical method for water erosion.
- Ridge and furrow system (D): Mechanical method.
Thus, strip cropping is a biological control for wind erosion.

Step 3: Final Answer:
Thus, biological control of wind erosion is strip cropping, which corresponds to option (A).
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