r.uslek Computes USLE Soil Erodibility Factor (K). Raster (r.*) ParameterRaster|psand|Name of soil sand fraction raster map [0.0-1.0]|False ParameterRaster|pclay|Name of soil clay fraction raster map [0.0-1.0]|False ParameterRaster|psilt|Name of soil silt fraction raster map [0.0-1.0]|False ParameterRaster|pomat|Name of soil organic matter raster map [0.0-1.0]|False OutputRaster|output|USLE R Raster