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Impermeable layer

A soil or rock horizon through which water cannot pass easily, restricting drainage and root penetration.

Related terms

  • Soil

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

  • Horizon

    A distinct soil layer that differs in color, structure, or composition from those above or below it.

  • Drainage

    The removal of excess water from soil, either naturally through slope and soil properties or artificially via ditches, pipes, or tiles.