The soil erodibility factor (K) indicates the inherent erodibility of a soil gives an indication of the soil loss from a unit plot . . . . . . . . m long with a 9% slope under continuous fallow culture

The soil erodibility factor (K) indicates the inherent erodibility of soil indicates the soil loss from a unit plot 22 m long with a 9% slope under continuous fallow culture.
K factor represents both susceptibility of soil to erosion and the rate of runoff as measured under the standard unit plot condition.