humic substance

noun
an organic residue of decaying organic matter
Hypernyms: ↑organic compound
Hyponyms: ↑fulvic acid, ↑humic acid, ↑humin

Useful english dictionary. 2012.

Look at other dictionaries:

  • Humic acid — is one of the major components of humic substances [http://www.ihss.gatech.edu/whatarehs.html] which are dark brown and major constituents of soil organic matter humus that contributes to soil chemical and physical quality and are also precursors …   Wikipedia

  • humic acid — noun a dark brown humic substance that is soluble in water only at pH values greater than 2 the half life of humic acid is measured in centuries • Hypernyms: ↑humic substance * * * noun : any of various organic acids that are insoluble in alcohol …   Useful english dictionary

  • humic acid — Humin Hu min, n. [L. humus the earth, ground.] (Chem.) A bitter, brownish yellow, amorphous substance, extracted from vegetable mold, and also produced by the action of acids on certain sugars and carbohydrates; called also {humic acid}, {ulmin} …   The Collaborative International Dictionary of English

  • humic — /hyooh mik/ or, often, /yooh /, adj. Chem. of or noting a substance, as an acid, obtained from humus. [1835 45; < L hum(us) ground, mould + IC] * * * …   Universalium

  • humic — hu•mic [[t]ˈhyu mɪk[/t]] often [[t]ˈyu [/t]] adj. chem. of or noting a substance, as an acid, obtained from humus • Etymology: 1835–45 …   From formal English to slang

  • International Humic Substances Society — The International Humic Substances Society (IHSS) is a scientific society that seeks to advance knowledge and research of natural organic matter (NOM) in soil and water. It was founded in Denver, Colorado, USA, on September 11, 1981 by scientists …   Wikipedia

  • fulvic acid — noun a yellow to yellow brown humic substance that is soluble in water under all pH conditions they measured the fluvial fulvic acid • Hypernyms: ↑humic substance …   Useful english dictionary

  • humin — noun a black humic substance that is not soluble in water • Hypernyms: ↑humic substance …   Useful english dictionary

  • soil organism — ▪ biology  any organism inhabiting the soil during part or all of its life. Soil organisms, which range in size from microscopic cells that digest decaying organic material to small mammals that live primarily on other soil organisms, play an… …   Universalium

  • organic compound — noun any compound of carbon and another element or a radical • Hypernyms: ↑compound, ↑chemical compound • Hyponyms: ↑aldehyde, ↑aliphatic compound, ↑alkylbenzene, ↑alkyl halide, ↑haloalk …   Useful english dictionary

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