| 单词 | organic soil |
| 释义 | > as lemmasorganic soil organic soil n. soil that is naturally rich in organic matter (typically containing at least 20% organic matter by weight in a layer more than one meter in thickness) (cf. mineral soil n. at mineral adj. Compounds 1). ΘΚΠ the world > the earth > structure of the earth > constituent materials > earth or soil > kind of earth or soil > [noun] > organic soil muck1832 muck soil1852 organic soil1886 1886 Bot. Gaz. 11 199 The..table lands of the interior..show a great extent..of fine organic soil of great depth and apparent unbounded fertility. 1928 Bull. Amer. Soil Survey Assoc. 9 33 Organic soils, soils composed mainly of organic material; the organic content being sufficient to dominate the soil characteristics. 1943 C. E. Millar & L. M. Turk Fund. Soil Sci. ii. 63 Deposits of organic soils are of common occurrence in the northern border states of Minnesota eastward. 1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) XII. 423/1 Organic soils such as peats and mucks may contain as much as 95% carbonaceous material. 1991 R. J. Pankhurst & J. M. Mullin Flora of Outer Hebrides (BNC) 27 Peat is an organic soil which contains more than 60 per cent of organic matter and exceeds 50 centimetres in thickness. < as lemmas |
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