| 单词 | crumb structure |
| 释义 | > as lemmascrumb structure crumb structure n. [translating German krümelstruktur (E. Wollny 1882, in Forsch. auf d. Geb. d. Agrik.-Physik V. 146)] the condition of soil when its particles are aggregated into crumbs (sense 1c). ΘΚΠ the world > the earth > structure of the earth > constituent materials > earth or soil > [noun] > aggregate crumb1906 crumb structure1906 ped1951 1906 E. W. Hilgard Soils vii. 109 The word ‘Krümelstructur’ (crumb-structure), adopted by Wollny for this phenomenon, has both fitness and priority in its favor. 1906 E. W. Hilgard Soils vii. 110 Clay is most frequently the substance which imparts at least temporary stability to the crumbs and crumb-structure. 1926 A. G. Tansley & T. F. Chipp Aims & Methods Study Vegetation vii. 116 The ‘primary’ inorganic particles of soil show a tendency to aggregate into ‘compound particles’... This ‘crumb structure’ ..is found in all good agricultural and good forest soils. 1960 L. D. Stamp Britain's Struct. & Scenery (ed. 5) xi. 96 It is mainly the maintenance of this soil-structure, especially this crumb structure, which the farmer means when he talks about..‘maintaining a fine tilth’. < as lemmas |
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