- acid humus
- 酸性腐殖
English-Chinese Dictionary of Agriculture (英汉农业大词典). 2013.
acid humus
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acid humus — noun : humus with a pH below 7.0 … Useful english dictionary
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
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 — 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
fulvic acid — ▪ chemical compound one of two classes of natural acidic organic polymer that can be extracted from humus found in soil, sediment, or aquatic environments. Its name derives from Latin fulvus, indicating its yellow colour. This organic… … Universalium
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
geic 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 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
fulvic acid — noun A straw coloured extract of humus that remains after humic acid has been precipitated with acid … Wiktionary
humic acid — hu·mic acid hyü mik , yü n any of various organic acids obtained from humus … Medical dictionary
humic acid — n. a brown powder consisting of organic acids, derived from humus … English World dictionary
