RUSLE2 considers that only one vegetation is growing at a time.
	Values in database must describe the conditions when this vegetation is present.
	RUSLE2 can not combine data from one vegetation and another vegetation to produce a composite vegetation.
	An example is intercropping and the understory of grass under shrubs on rangeland.
	Try to use time varying root biomass values to account for root sloughing so that RUSLE2 can compute a buildup of biomass in the soil.
	Use time varying canopy values where canopy values decrease to represent senescence and RUSLE2 can compute a litter layer on the soil surface.
	Follow core databases.
	Review data from multiple studies and observations before selecting values.  Variability is large.  Don’t rely on data from a single source.  RUSLE2 is designed to represent main effects in a consistent way across applications.