The universal soil equation “A = R x K x L x S x C x P” was formulated by ____ in 1929.

✅Explanation:
The Universal Soil Loss Equation (USLE) is a widely used mathematical model that estimates the average annual soil loss caused by sheet and rill erosion on a specific plot of land. It was developed by Walter H. Wischmeier and Dwight D. Smith in 1958, with the initial version published in 1941.

• Breakdown of the USLE equation:
● A: Estimated average annual soil loss per unit area (tons/acre/year)
● R: Rainfall erosivity factor (function of rainfall intensity and duration)
● K: Soil erodibility factor (measure of the soil's susceptibility to erosion)
● L: Slope length factor (effect of slope length on erosion)
● S: Slope steepness factor (effect of slope gradient on erosion)
● C: Cover management factor (effect of vegetation and crop management on erosion)
● P: Supporting practices factor (effect of erosion control practices on erosion)

🛑 Related Terminology:
● Soil erosion: The process by which soil is detached and transported by natural forces such as water and wind.
● Sheet erosion: The uniform removal of soil in thin layers by raindrop impact and overland flow.
● Rill erosion: The removal of soil by concentrated water flow in small channels.
● Gully erosion: The removal of soil by larger channels or ravines.