RUSLE Factors 

Both RUSLE and USLE can be expressed as follows:

                  A = R * K * LS * C * P

 A = estimated average soil loss in tons per acre per year
 R = rainfall-runoff erosivity factor 
 K = soil erodibility factor
 L = slope length factor
 S = slope steepness factor
 C = cover-management factor
 P = support practice factor

Another factor for soils is called "T value" which stands for "Tolerable Soil Loss." It is not directly used in RUSLE equation, but is often used along with RUSLE for conservation planning. Soil loss tolerance (T) is the maximum amount of soil loss in tons per acre per year, that can be tolerated and still permit a high level of crop productivity to be sustained economically and indefinitely.

Click on the links above to read the detail description of each factor.

Copyright 2002 Institute of Water Research, Michigan State University