r.usler Computes USLE R factor, Rainfall erosivity index. Raster (r.*) QgsProcessingParameterRasterLayer|input|Name of annual precipitation raster map [mm/year]|None|False QgsProcessingParameterEnum|method|Name of USLE R equation|roose;morgan;foster;elswaify|False|0|False QgsProcessingParameterRasterDestination|output|USLE R Raster