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Aggregation

The process by which individual soil particles (sand, silt, clay) are bound into aggregates through root secretions, microbial activity, and chemical forces.

Related terms

  • Soil

    The upper layer of earth consisting of mineral particles, organic matter, water, and air, essential for plant growth and ecosystems.

  • Sand

    Soil particles between 0.05 and 2 mm in diameter, giving soil a gritty texture and good drainage.

  • Silt

    Soil particles between 0.002 and 0.05 mm in diameter, giving soil a smooth texture and moderate fertility.

  • Clay

    Soil particles smaller than 0.002 mm in diameter, known for high surface area, water-holding ability, and plasticity. Also used as a soil textural class.

  • Aggregates

    Natural clusters of soil particles ranging in size from microaggregates to larger peds. They influence soil porosity, water retention, and root penetration.