Question

In wind erosion equation, E=f(IKCLV), I stands for:

• A. Soil erodibility index
• B. Soil erosivity index
• C. Wind velocity
• D. Wind duration

Hint:

The soil erodibility index (\(I\)) is determined by the percentage of soil aggregates that are larger than \(0.84 \text{ mm}\) in diameter.
Larger aggregates are less likely to be moved by wind.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
The Wind Erosion Equation (WEQ), developed by W.S. Chepil and N.P. Woodruff, is an empirical model used to predict the average annual soil loss from a field due to wind action.

Step 2: Detailed Explation:
The wind erosion equation is represented as: \[ E = f(I, K, C, L, V) \] where each variable represents a key factor influencing wind erosion:
• \(E\): Estimated average annual soil loss.

• \(I\): Soil erodibility index, which represents the susceptibility of the soil to wind erosion based on soil aggregate size and structural properties.

• \(K\): Soil ridge roughness factor, which measures the effect of surface roughness (such as tillage ridges) on reducing wind velocity.

• \(C\): Climatic factor, which accounts for local wind speed, soil moisture, and temperature.

• \(L\): Unsheltered distance, which is the distance of open field along the prevailing wind direction.

• \(V\): Vegetative cover factor, which evaluates the protection provided by living or residue plant cover.
Therefore, \(I\) stands for the soil erodibility index.

Step 3: Fil Answer:
The correct option is (A).