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Surface layer thickness | < 30% slope | > 30% slope |
> 20 cm | ||
10-20 cm | ||
< 10 cm |
Click on the appropriate table (A, B, or C) to see risk ratings for soils based on surface layer thickness and slope.
Table adopted from NRCS (Natural Resources Conservation Service, USDA) National Forestry Manual 1998.
Encyclopedia ID: p685