'''Slope-steepness factor''' or S factor – USLE is the ratio of [[soil]] loss from the field slope gradient to that from a 9 percent slope under otherwise identical conditions. Used in Universal soil loss equation (USLE) calculations of sheet and rill erosion.
==References==
[http://www.nrcs.usda.gov/technical/NRI/1997/summary_report/glossary.html List of USDA terminology] <br>
[[Category:Agriculture]]
{{USDA_Terms}}