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This glossary is far from complete. We are constantly adding terms.

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Solid earth materials which have been altered by physical, chemical, and biological processes, such that they can support rooted plant life


  1. Almost all of our agriculture is based on the fertility of the soil on which it grows.
  2. Mechanical properties of soil strength are important in land stability and in prevention of landslides.
  3. Movement of water in soils is important in aquifer generation, flood control, and plant growth.
  4. Chemical interaction with the soil is important for chemicals, both beneficial (plant nutrients) and hazardous.

See also

Soil Conservation
Soil Erosion