Concept of Core Database
	n RUSLE2 has been calibrated to experimental erosion data using assumed data values for such things as cover-mass, residue at harvest, decomposition coefficient, root biomass, burial ratios, etc. n The data used in this calibration are core calibration values - Data used in RUSLE2 applications must be consistent with these values n Core databases were set up for vegetation, residue, and operations - NRCS data manager maintains these databases n Working databases developed from the core databases