brown humic acid

褐色胡敏酸

English-Chinese Dictionary of Agriculture (英汉农业大词典). 2013.

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  • 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 — n. a brown powder consisting of organic acids, derived from humus …   English World dictionary

  • 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 — a brown, melanin tinted mixture of polymers, found in lignite, peat, and soils, where it acts as a cation exchange agent: used in drilling fluids and inks. [1835 45] * * * ▪ chemistry       one of two classes of natural acidic organic polymer… …   Universalium

  • Acid dissociation constant — Acetic acid, a weak acid, donates a proton (hydrogen ion, high …   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

  • Tannin — For other uses, see Tannin (demon). Tannic acid …   Wikipedia

  • Shilajit — Shilajit, also known as shilajit, silajit, mumijo, and momia,[1] is a thick, sticky tar like substance with a colour ranging from white to dark brown (the latter is more common), sometimes found in Caucasus mountains, Altai mountains and Tibet… …   Wikipedia

  • Humus — (Origin: 1790–1800; < Latin : earth, ground [ humus. Dictionary.com Unabridged (v 1.1). Random House, Inc. 23 Sep. 2008. .] ) is the organic material in soil lending it a dark brown or black colouration. In soil science, humus refers to any… …   Wikipedia

  • Oderteich — Country Germany Location Lower Saxony Coordinates …   Wikipedia

  • Opal — For other uses, see Opal (disambiguation). Opal An opal bracelet. The stone size is 18 by 15 mm (0.7 by 0.6 in) General Category …   Wikipedia

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