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mature soil

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  • mature soil — noun : a soil that has passed through the major developmental phases and become relatively stabilized especially to the point that incorporation of organic material is approximately equal to the withdrawal of soluble material by plants …   Useful english dictionary

  • soil — soil1 soilless, adj. /soyl/, n. 1. the portion of the earth s surface consisting of disintegrated rock and humus. 2. a particular kind of earth: sandy soil. 3. the ground as producing vegetation or as cultivated for its crops: fertile soil. 4. a… …   Universalium

  • intrazonal soil — /ˌɪntrəzoʊnəl ˈsɔɪl/ (say .intruhzohnuhl soyl) noun one of a group of mature soils which have been more affected by some local factor or relief or rock type than by climate and vegetation …  

  • zonal soil — /zoʊnəl ˈsɔɪl/ (say zohnuhl soyl) noun one of a group of mature soils in the formation of which climate and vegetation have played a dominant part …  

  • horizon — /heuh ruy zeuhn/, n. 1. the line or circle that forms the apparent boundary between earth and sky. 2. Astron. a. the small circle of the celestial sphere whose plane is tangent to the earth at the position of a given observer, or the plane of… …   Universalium

  • Seed company — Seed companies produce and sell seeds for flowers, fruit and vegetables to theamateur gardener. The production of seed is a multi billion dollar business, which usesgrowing facilities and growing locations world wide. While most seed is produced… …   Wikipedia

  • Blowout (geology) — Blowouts are sandy depressions in a sand dune ecosystem (psammosere) caused by the removal of sediments by wind. Blowouts occur in partially vegetated dunefields or sandhills. A blowout forms when a patch of protective vegetation is lost,… …   Wikipedia

  • angiosperm — /an jee euh sperrm /, n. Bot. a plant having its seeds enclosed in an ovary; a flowering plant. Cf. gymnosperm. [ANGIO + SPERM] * * * ▪ plant Introduction       any member of the more than 300,000 species of flowering plants (division Anthophyta) …   Universalium

  • Heliciculture — (snail farming) is the process of farming or raising snails.HistoryRoasted snail shells have been found in archaeological excavations, an indication that snails have been eaten since prehistoric times [ [http://watarts.uwaterloo.ca/… …   Wikipedia

  • Life Sciences — ▪ 2009 Introduction Zoology       In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… …   Universalium

  • reproductive system, plant — Introduction       any of the systems, sexual or asexual, by which plants reproduce. In plants, as in animals, the end result of reproduction is the continuation of a given species, and the ability to reproduce is, therefore, rather conservative …   Universalium

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