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  2. Tilth - Wikipedia

    en.wikipedia.org/wiki/Tilth

    Large pores drain rapidly and are needed for good air exchange during wet periods, preventing oxygen deficiency that can drown plants and increase pest problems. Oxygen-deficient wet soils increase denitrification – conversion of nitrogen to gaseous forms. In degraded soil, large pores are compressed into small ones. [4]

  3. Permeability of soils - Wikipedia

    en.wikipedia.org/wiki/Permeability_of_soils

    Soil aeration maintains oxygen levels in the plants' root zone, needed for microbial and root respiration, and important to plant growth. Additionally, oxygen levels regulate soil temperatures and play a role in some chemical processes that support the oxidation of elements like Mn 2+ and Fe 2+ that can be toxic.

  4. Hydraulic redistribution - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_redistribution

    Hydraulic redistribution is a passive mechanism where water is transported from moist to dry soils via subterranean networks. [1] It occurs in vascular plants that commonly have roots in both wet and dry soils, especially plants with both taproots that grow vertically down to the water table, and lateral roots that sit close to the surface.

  5. Hydric soil - Wikipedia

    en.wikipedia.org/wiki/Hydric_soil

    This is important because plant roots respire (that is, they consume oxygen and carbohydrates while releasing carbon dioxide) and there must be sufficient air—especially oxygen—in the soil to support most forms of soil life. Air normally moves through interconnected pores by forces such as changes in atmospheric pressure, the flushing ...

  6. Air Plants Don't Need Soil to Survive, But Here's What They ...

    www.aol.com/air-plants-dont-soil-survive...

    Air plants, or tillidansias, don't need soil to survive, but they do need water. ... turning the plant so every surface gets wet. Or soak the plant in a bowl about an hour once a week, says Di ...

  7. Physical properties of soil - Wikipedia

    en.wikipedia.org/wiki/Physical_properties_of_soil

    Soil bulk density is equal to the dry mass of the soil divided by the volume of the soil; i.e., it includes air space and organic materials of the soil volume. Thereby soil bulk density is always less than soil particle density and is a good indicator of soil compaction. [ 47 ]

  8. Soil water (retention) - Wikipedia

    en.wikipedia.org/wiki/Soil_water_(retention)

    Pores (the spaces that exist between soil particles) provide for the passage and/or retention of gasses and moisture within the soil profile.The soil's ability to retain water is strongly related to particle size; water molecules hold more tightly to the fine particles of a clay soil than to coarser particles of a sandy soil, so clays generally retain more water. [2]

  9. Soil moisture - Wikipedia

    en.wikipedia.org/wiki/Soil_moisture

    When the soil moisture content is optimal for plant growth, the water in the large and intermediate size pores can move about in the soil and be easily used by plants. [9] The amount of water remaining in a soil drained to field capacity and the amount that is available are functions of the soil type.

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