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  2. Soil carbon - Wikipedia

    en.wikipedia.org/wiki/Soil_carbon

    Soil carbon is present in two forms: inorganic and organic. Soil inorganic carbon consists of mineral forms of carbon, either from weathering of parent material, or from reaction of soil minerals with atmospheric CO 2. Carbonate minerals are the dominant form of soil carbon in desert climates. Soil organic carbon is present as soil organic matter.

  3. Soil - Wikipedia

    en.wikipedia.org/wiki/Soil

    Soil consists of a solid phase of minerals and organic matter (the soil matrix), as well as a porous phase that holds gases (the soil atmosphere) and water (the soil solution). [ 1 ] [ 2 ] Accordingly, soil is a three- state system of solids, liquids, and gases. [ 3 ]

  4. Soil organic matter - Wikipedia

    en.wikipedia.org/wiki/Soil_organic_matter

    The pool of organic carbon exists in dynamic equilibrium between gains and losses; soil may therefore serve as either a sink or source of carbon through carbon sequestration or greenhouse gas emissions, respectively, depending on exogenous factors.

  5. Physical properties of soil - Wikipedia

    en.wikipedia.org/wiki/Physical_properties_of_soil

    When the organic component of a soil is substantial, the soil is called organic soil rather than mineral soil. A soil is called organic if: Mineral fraction is 0% clay and organic matter is 20% or more; Mineral fraction is 0% to 50% clay and organic matter is between 20% and 30%; Mineral fraction is 50% or more clay and organic matter 30% or ...

  6. Organic matter - Wikipedia

    en.wikipedia.org/wiki/Organic_matter

    Organic matter, organic material, or natural organic matter refers to the large source of carbon-based compounds found within natural and engineered, terrestrial, and aquatic environments. It is matter composed of organic compounds that have come from the feces and remains of organisms such as plants and animals . [ 1 ]

  7. Geochemistry of carbon - Wikipedia

    en.wikipedia.org/wiki/Geochemistry_of_carbon

    More organic matter is preserved in sediments if there is high primary production, or the sediment is fine-grained. The lack of oxygen helps preservation greatly, and that also is caused by a large supply of organic matter. Soil does not usually preserve organic matter, it would need to be acidified or water logged, as in the bog.

  8. Carbon cycle - Wikipedia

    en.wikipedia.org/wiki/Carbon_cycle

    Most carbon in the terrestrial biosphere is organic carbon, [21] while about a third of soil carbon is stored in inorganic forms, such as calcium carbonate. [22] Organic carbon is a major component of all organisms living on Earth.

  9. Soil ecology - Wikipedia

    en.wikipedia.org/wiki/Soil_ecology

    Soil structure refers to the size, shape and arrangement of solid particles in soil. [15] Factors such as climate, vegetation and organisms influence the complex arrangement of particles in the soil [16] Structural features of the soil include microporosity and pore size which are also affected by minerals and soil organic matter. [17]