V.Steep = very steep slopes
General Notes
Coarse Textured Soils -- Deep and Moderately Deep
1. Coarse surface soil texture is a major factor that keeps a soil
out of Class I.
2. The best land capability class for coarse textured soils is Class
III.
3. Slopes from 1 to 3 percent are considered a major factor, but will
not lower the land capability class.
4. Moderate erosion will be checked as a major factor, but will not
lower the land capability class.
5. Either very slow or rapid surface runoff will be checked as a major
factor, except where the soil is rapidly permeable, but these factors will
not lower the land capability class.
6. Rapid permeability will be checked as a major factor, but it will
not lower the land capability class.
7. In combination with texture, slopes over 3 percent and severe or
very severe erosion are major factors that lower the land capability class
from III or IV to VI.
8. The best land capability class for coarse textured soils on slopes
of less than 3 percent with severe or very severe erosion is Class VI.
9. The best land capability class for coarse textured soils on moderately
sloping or strongly sloping soils is Class IV.
10. The best land capability class for coarse textured soils on moderately
sloping or strongly sloping soils with severe or very severe erosion is
Class VI.
11. The best land capability class for coarse textured soils on steep
or very steep slopes is Class VI.
12. Shallow or very shallow, coarse textured soils will not be used
in contests.
Table 1. Coarse Textured Soils -- Deep and Moderately Deep
| Slope |
Erosion |
Perm-
eability |
Surface
Runoff |
Capability
Class |
Factors
that keep
land out
of Class I |
Vege-
tative
Treatment |
Possible
Mechanical
Treatment
use one
or more |
| N.L. |
N |
S |
S |
III |
1 |
3,5,6 |
14,20 |
| N.L. |
M |
S |
S |
III |
1,4 |
3,5,6 |
14,20 |
| N.L. |
Sev & V. |
S |
S |
VI |
1,4 |
7,8,9,10 |
14,19,20 |
|
Sev |
|
|
|
|
|
|
| G.S. |
N |
S |
M |
III |
1,3 |
3,5,6 |
14,20 |
| G.S. |
M |
S |
M |
III |
1,3,4 |
3,5,6 |
14,20 |
| G.S. |
Sev & V. |
S |
M |
VI |
1,3,4 |
7,8,9,10 |
14,19,20 |
| - |
Sev |
- |
- |
- |
- |
- |
- |
| N.L. |
N |
M |
V.S. |
III |
1,6 |
3,5,6 |
14,20 |
| N.L. |
M |
M |
V.S. |
III |
1,4,6 |
3,5,6 |
14,20 |
| N.L. |
Sev & V. |
M |
V.S. |
VI |
1,4,6 |
7,8,9,10 |
14,19,20 |
|
Sev |
|
|
|
|
|
|
| G.S. |
N |
M |
M |
III |
1,3 |
3,5,6 |
14,20 |
| G.S. |
M |
M |
M |
III |
1,3,4 |
3,5,6 |
14,20 |
| G.S. |
Sev & V. |
M |
M |
VI |
1,3,4 |
7,8,9,10 |
14,19,20 |
| - |
Sev |
- |
- |
- |
- |
- |
- |
| M.S. |
N |
M |
R |
IV |
1,3,6 |
4,5,6 |
14,20 |
| M.S. |
M |
M |
R |
IV |
1,3,4,6 |
4,5,6 |
14,20 |
| M.S. |
Sev & V. |
M |
R |
VI |
1,3,4,6 |
7,8,9,10 |
14,19,20 |
|
Sev |
|
|
|
|
|
|
| Str. |
N |
M |
R |
IV |
1,3,6 |
4,5,6 |
14,20 |
| Str. |
M |
M |
R |
IV |
1,3,4,6 |
4,5,6 |
14,20 |
| Str. |
Sev & V. |
M |
R |
VI |
1,3,4,6 |
7,8,9,10 |
14,19,20 |
| - |
Sev |
- |
- |
- |
- |
- |
- |
| Steep |
All |
M |
R |
VI |
1,3,6 also |
7,8,9,10 |
14,19,20 |
| V.Steep |
|
|
|
|
4 if eroded |
|
|
| N.L. |
N |
R |
V.S. |
III |
1,5 |
3,5,6 |
14,20 |
| N.L. |
M |
R |
V.S. |
III |
1,4,5 |
3,5,6 |
14,20 |
| N.L. |
Sev.& V. |
R |
v.S. |
VI |
1,4,5 |
7,8,9,10 |
14,19,20 |
| - |
Sev. |
- |
- |
- |
- |
- |
- |
| G.S. |
N. |
R |
M |
III |
1,3,5 |
3,5,6 |
14,20 |
| G.S. |
M |
R |
V.S. |
III |
1,3,4,5 |
3,5,6 |
14,20 |
| G.S. |
Sev & V. |
R |
V.S. |
VI |
1,3,4,5 |
7,8,9,10 |
14,19,20 |
|
Sev |
|
|
|
|
|
|
| M.S. |
N |
R |
V.S. |
IV |
1,3,5 |
4,5,6 |
14,20 |
| M.S. |
M |
R |
V.S. |
IV |
1,3,4,5 |
4,5,6 |
14,20 |
| M.S. |
Sev & V. |
R |
V.S. |
VI |
1,3,4,5 |
7,8,9,10 |
14,19,20 |
| - |
Sev |
- |
- |
- |
- |
- |
- |
| Str. |
N |
R |
V.S. |
IV |
1,3,5 |
4,5,6 |
14,20 |
| Str. |
M |
R |
V.S. |
IV |
1,3,4,5 |
4,5,6 |
14,20 |
| Str. |
Sev & V. |
R |
V.S. |
VI |
1,3,4,5 |
7,8,9,10 |
14,19,20 |
|
Sev |
|
|
|
|
|
|
| Steep, V. |
all |
R |
all |
VI |
1,3,5 also |
7,8,9,10 |
14,19,20 |
| Steep |
|
|
|
|
4 if eroded |
|
|
Moderately Coarse, Medium, Moderately Fine, and Fine
Textured Soils --- Deep and Moderately Deep
1. Surface soil texture is not a major factor that keeps a soil
out of Class I.
2. The best land capability class for moderately coarse, medium,
moderately fine, and fine soils is Class I.
3. Slope of less than 1 percent is not a major factor.
4. Slope over 1 percent is a major factor and will lower the land
capability class.
5. Very slow permeability is a major factor and will further lower
the land capability class by one unit on land Classes I through IV.
6. Very slow surface runoff is a major factor and it will lower the
land capability by one unit.
7. Rapid surface runoff is a major factor, but it will not lower
the land capability class.
8. Moderate erosion is a major factor that will lower the land capability
class on slopes less than 3 percent. Moderate erosion is a major factor,
but it will not lower the land capability class on slopes over 3 percent.
9. The best land capability class for severe and very severely eroded
soils is Class VI.
10. The best land capability class for moderately coarse, medium,
moderately fine and fine soils on 0 to 1 percent slopes that is moderately
wet is Class II. Wet soils can be no better than Class V. The degrees of
wetness will be given. Wetness will be checked as a major factor and will
lower the land capability class.
11. On nearly level slopes, moderate erosion can occur. However,
such a condition will not be used in land judging contests.