The soil loss equation is:

A = R K L S C P

• R- erosivity factor
• K- erodibility factor
• L- slope length factor
• S- slope steepness factor
• C- cover-management factor
• P- supporting practices factor

where A is the computed soil loss per unit area, expressed in the units selected for K and for the period selected for R. In practice, these are usually so selected that they compute A in ton per acre per year, but other units can be selected.