Universal Soil Loss Equation  (USLE) or
 
Revised Universal Soil Loss Equation  (RUSLE)
Predicting Soil Erosion
A = RKLSCP
A = metric tons of soil lost per hectare per year
R = rainfall erosivity
K = erodibility of soil
L = length of slope
S = steepness of slope
C = cover type
P = erosion control practices