In Universal Soil Loss Equation, A = RKLScP, K denotes:

Correct option is C

The correct answer is (C) Soil erodibility

Explanation:
• The Universal Soil Loss Equation (USLE) is a mathematical model used to predict the long-term average annual rate of erosion on a field slope.
• The formula is $A = R \times K \times LS \times C \times P$.
• A: Predicted average annual soil loss.
• R: Rainfall and runoff erosivity factor.
• K: Soil erodibility factor. It represents the susceptibility of soil particles to detachment and transport by rainfall and runoff.
• LS: Slope length (L) and Steepness (S) factor.
• C: Cover and management factor (type of crop).
• P: Support practice factor (contouring, terracing).

Information Booster:
• The K-factor is determined by soil texture, structure, organic matter, and permeability. Silty soils typically have high K-values (highly erodible).
• The USLE was originally developed by Wischmeier and Smith in the 1960s.

Additional Knowledge:
• Soil Conservation practices (Option A): Denoted by 'P'.
• Rainfall factor (Option D): Denoted by 'R'.
• LS Factor: Combines the effect of the length and gradient of the slope; doubling the slope steepness usually more than doubles the soil loss.