|
|
Soil Surface Texture |
Clays |
Clay Loams |
Loams |
Sandy Loams |
Sands |
|
|
|
Estimated Soil Factor |
0.24 |
0.28 |
0.32 |
0.37 |
0.28 |
0.32 |
0.37 |
0.43 |
0.32 |
0.37 |
0.43 |
0.49 |
0.20 |
0.24 |
0.32 |
0.37 |
0.15-0.17 |
0.20 |
0.24 |
0.28 |
|
|
|
|
|
| Group A |
Soils having high infiltration rates when thoroughly wetted. These consist chiefly of deep, well-to-excessively drained sands or gravels with a high rate of water transmission which produces a low surface runoff potential. The entire solum has a very low content of clay and typically includes loose sands through loamy sandy soils. |
| Group B |
Soils having moderate infiltration rates when thoroughly wetted. These consist chiefly of moderately deep to deep, moderately well-to-well drained soils with moderately fine to moderately coarse textures. These soils have a moderate rate of water transmission. |
| Group C |
Soils having slow infiltration rates when thoroughly wetted. These soils consist of two groups; (1) those with moderately fine to fine texture and a slow infiltration rate or, (2) those with a layer that impedes the downward movement of water. Both groups results in a slow rate of water transmission. These soils are “heavy”, and range from silt loams through the silty clay loams. |
| Group D |
Soils having very slow infiltration rates when thoroughly wetted. These soils consist of (1) clay soils with a clay pan of clay layer at of near the surface of the ground or, (2) shallow soils overlaying nearly impervious materials. |
|
|
|
