| 释义 |
regur|ˈrɛgə(r), ˈreɪgə(r)|
[ad. Hind. regaṛ black soil, ad. Telugu rē-gaḍa, rē-gaḍi clay.]
Rich, dark, calcareous soil rich in clay, formed mainly by the weathering of basaltic rock and occurring extensively on the Deccan Plateau of India. Cf. black cotton soil s.v. black a. 19. Also attrib.
1828Edin. New Philos. Jrnl. VI. 119 Immense deposits of a black alluvial clay are met with in various parts of India. It is denominated cotton ground, from the circumstance of that plant being always cultivated upon it. It is the regur soil of the ryuts. 1838[see black cotton ground s.v. black a. 19]. 1879Medlicott & Blanford Man. Geol. of India I. xviii. 429 Regur, in its most characteristic form,..preserves the constant characters of being highly argillaceous and somewhat calcareous, of becoming highly adhesive when wetted,..and of expanding and contracting to an unusual extent under the respective influences of moisture and dryness. 1906E. W. Hilgard Soils xxi. 415 In view of the low rainfall and the closeness of the texture of regur, it is probable that little if any nitrates are currently washed out of the black cotton lands. Ibid., The regur soil-sheet seems to be underlaid over the greater part of its area by a basaltic eruptive sheet. 1965A. Gourevitch tr. Gerasimov's Fund. of Soil Sci. & Soil Geogr. xx. 326 In Asia, tropical black soils (regur) cover much of the Deccan plateau..and are widespread on the islands of Indonesia. |