Vegetative Cover |
C factor |
Percent reduction of soil loss |
None (fallow ground) |
1.0 |
0 |
Native vegetation (undisturbed) |
0.01 |
99 |
Temporary tyegrass, 99% (perennial) |
0.05 |
95 |
Temporary ryegrass, 90% (annuals) |
0.1 |
90 |
Permanent seedings (90%) |
0.01 |
99 |
Sod (laid immediately) |
0.01 |
99 |
Mulching (for slopes 2:1 or less) |
Hay (0.5 tons/acre) |
0.25 |
75 |
Hay (1.0 tons/acre) |
0.13 |
87 |
Hay (1.5 tons/acre) |
0.07 |
93 |
Hay (2.0 tons/acre) |
0.02 |
98 |
Wood chips (6 tons/acre) |
0.06 |
94 |
Wood cellulose (1.75 tons per acre)X |
0.10 |
90 |
Other |
Competent gravel layer |
0.05 |
95 |
Rolled erosion control fabrics |
(for slope greater than 2:1 |
Variable C value by type |