Everything about Soil Texture totally explained
Soil texture is a
soil property used to describe the relative proportion of different
grain sizes of
mineral particles in a soil. Particles are grouped according to their size into what are called
soil separates (
clay,
silt, and
sand). The soil
texture class (eg. sand, clay loam, etc) corresponds to a particular range of separate fractions, and is diagramatically represented by the soil texture triangle.
Coarse textured soils contain a large proportion of sand,
medium textures are dominated by silt, and
fine textures by clay.
Soil separate
A
soil separate is a specific range of particle sizes. The larger sizes are described as
coarse, intermediate as
medium, and the smaller as
fine. (Different methods of
soil texture classification define the separates slightly differently.)
| Name of soil separate |
Diameter limits (mm) (USDA classification) |
| Clay |
less than 0.002 |
| Silt |
0.002 - 0.05 |
| Very fine sand |
0.05 - 0.10 |
| Fine sand |
0.10 - 0.25 |
| Medium sand |
0.25 - 0.50 |
| Coarse sand |
0.50 - 1.00 |
| Very coarse sand |
1.00 - 2.00 |
Major texture classes
There are 12 major texture classes:
Further Information
Get more info on 'Soil Texture'.
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