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  2. Humic substance - Wikipedia

    en.wikipedia.org/wiki/Humic_substance

    Humic acid isolated from peat Fulvic acid isolated from peat. Humic substances (HS) are colored relatively recalcitrant organic compounds naturally formed during long-term decomposition and transformation of biomass residues. The color of humic substances varies from bright yellow to light or dark brown leading to black.

  3. Humus - Wikipedia

    en.wikipedia.org/wiki/Humus

    Humus has a characteristic black or dark brown ... Humus is the Latin word for "earth" or "ground". ... Artificial humic acid and artificial fulvic acid synthesized ...

  4. Chernozem - Wikipedia

    en.wikipedia.org/wiki/Chernozem

    Chernozem (/ ˈ tʃ ɜːr n ə z ɛ m / CHUR-nə-zem), [a] also called black soil, regur soil or black cotton soil, is a black-colored soil containing a high percentage of humus [3] (4% to 16%) and high percentages of phosphorus and ammonia compounds. [4] Chernozem is very fertile soil and can produce high agricultural yields with its high ...

  5. Leonardite - Wikipedia

    en.wikipedia.org/wiki/Leonardite

    It is used to condition soils either by applying it directly to the land, or by providing a source of humic acid or potassium humate for application. The carbon geosequestration potential of Leonardite, particularly to rapidly accelerate microbial action to lock up and retain carbon in soils, provides the basis for extensive research in Victoria on the organic fertilising aspect of brown coal.

  6. International Humic Substances Society - Wikipedia

    en.wikipedia.org/wiki/International_Humic...

    The International Humic Substances Society was founded in Denver, Colorado, USA, on September 11, 1981 by scientists who saw a need for a society to bring together scientists in the coal, soil, and water with interest in humic substances, and to provide opportunities for them to exchange ideas .

  7. Humin - Wikipedia

    en.wikipedia.org/wiki/Humin

    Soil consists of both mineral (inorganic) and organic components. The organic components can be subdivided into fractions that are soluble, largely humic acids, and insoluble, the humins. Humins make up about 50% of the organic matter in soil. [1]