Soil texture triangle, showing the 12 major textural classes, and particle size scales.

Soil texture is a soil property used to describe the relative proportion of different grain sizes of mineral particles in a soil. Soil, often typeset as SOiL, is a four piece rock band from Chicago Illinois United States founded by Shaun Glass Tom Schofield Tim King and Adam Zadel A mineral is a naturally occurring substance formed through geological processes that has a characteristic chemical composition a highly ordered atomic structure and specific Particles are grouped according to their size into what are called soil separates (clay, silt, and sand). Clay is a naturally occurring material composed primarily of fine-grained Minerals which show plasticity through a variable range of Water content, and Silt is Soil or rock derived Granular material of a Grain size between sand and clay Sand is a naturally occurring Granular material composed of finely divided rock and Mineral particles The soil texture class (eg. Texture in Geology refers to the physical appearance or character of a rock such as grain size shape arrangement and pattern at both the megascopic or microscopic surface 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. )

Major texture classes

There are 12 major texture classes:

• Sand
• Silt
• Clay
• Loam

References

• Soil Texture, by R. Sand is a naturally occurring Granular material composed of finely divided rock and Mineral particles Silt is Soil or rock derived Granular material of a Grain size between sand and clay Clay is a naturally occurring material composed primarily of fine-grained Minerals which show plasticity through a variable range of Water content, and Loam is Soil composed of Sand, Silt, and Clay in relatively even concentration (about 40-40-20% concentration respectively considered B. Brown, University of Florida, Institute of Food and Agricultural Sciences.