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  2. Physical properties of soil - Wikipedia

    en.wikipedia.org/wiki/Physical_properties_of_soil

    Soil bulk density, when determined at standardized moisture conditions, is an estimate of soil compaction. [3] Soil porosity consists of the void part of the soil volume and is occupied by gases or water. Soil consistency is the ability of soil materials to stick together. Soil temperature and colour are self-defining.

  3. Soil horizon - Wikipedia

    en.wikipedia.org/wiki/Soil_horizon

    A soil layer is a zone in the soil, approximately parallel to the soil surface, with properties different from layers above and/or below it. If at least one of these properties is the result of soil-forming processes, the layer is called a soil horizon. In the following, the term layer is used to indicate the possibility that soil-forming ...

  4. Hydrophobic soil - Wikipedia

    en.wikipedia.org/wiki/Hydrophobic_soil

    Hydrophobic soil is a soil whose particles repel water. The layer of hydrophobicity is commonly found at or a few centimeters below the surface, parallel to the soil profile. [1] This layer can vary in thickness and abundance and is typically covered by a layer of ash or burned soil.

  5. Soil mechanics - Wikipedia

    en.wikipedia.org/wiki/Soil_mechanics

    For a surface layer, the vertical effective stress becomes zero within the layer when the upward hydraulic gradient is equal to the critical gradient. [15] At zero effective stress soil has very little strength and layers of relatively impermeable soil may heave up due to the underlying water pressures.

  6. Soil morphology - Wikipedia

    en.wikipedia.org/wiki/Soil_morphology

    Soil texture is the analysis and classification of the particle size distribution in soil. The relative amounts of sand, silt, and clay particles determine a soil's texture, which affects the appearance, feel and chemical properties of the soil. [12] Soil texture-by-feel method

  7. Soil structure - Wikipedia

    en.wikipedia.org/wiki/Soil_structure

    A further consequence of continued cultivation and traffic is the development of compacted, impermeable layers or 'pans' within the profile. The decline of soil structure under irrigation is usually related to the breakdown of aggregates and dispersion of clay material as a result of rapid wetting.

  8. Soil - Wikipedia

    en.wikipedia.org/wiki/Soil

    Soil bulk density, when determined at standardized moisture conditions, is an estimate of soil compaction. [60] Soil porosity consists of the void part of the soil volume and is occupied by gases or water. Soil consistency is the ability of soil materials to stick together. Soil temperature and colour are self-defining.

  9. Soil matrix - Wikipedia

    en.wikipedia.org/wiki/Soil_matrix

    Soil particles can be classified by their chemical composition as well as their size. The particle size distribution of a soil, its texture, determines many of the properties of that soil, in particular hydraulic conductivity and water potential, [1] but the mineralogy of those particles can strongly modify those properties. The mineralogy of ...

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