> For the complete documentation index, see [llms.txt](https://swatplus.gitbook.io/io-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://swatplus.gitbook.io/io-docs/introduction-1/databases/plants.plt/usle_c_min.md).

# usle\_c\_min

The minimum C factor can be estimated from a known average annual C factor using the following equation (Arnold and Williams, 1995):

$$C\_{USLE,mn} = 1.463 \* ln⁡\[C\_{USLE,aa}] + 0.1034$$

where $$C\_{USLE,mn}$$ is the minimum C factor for the land cover and $$C\_{USLE,aa}$$ is the average annual C factor for the land cover. 

#### References

> Arnold and Williams (1995)