Question

The minimum wind velocity required to initiate the movement of soil particle is called:

• A. Threshold velocity
• B. Free velocity
• C. Fluid velocity
• D. Transporter

Hint:

Threshold velocity is the minimum wind speed required to start soil particle movement.

Answer 1

The Correct Option is A

Concept:
Wind erosion begins only when wind speed becomes strong enough to detach and move soil particles.

Step 1: Understand the condition.
Soil particles do not move at very low wind velocity.

Step 2: Define threshold velocity.
The minimum wind velocity needed to start movement of soil particles is called threshold velocity. \[ \text{Threshold velocity}=\text{minimum velocity for particle movement} \]

Step 3: Final answer. \[ \therefore \text{Correct Answer is (A)} \]