medium gravel

См. также в других словарях:

• gravel culture — noun : the growing of plants in an artificial medium using fine gravel to support the roots and supplying mineral nutrients in an aqueous solution …   Useful english dictionary

• interstitial medium —    Spaces between grains of sand or fine gravel filled with water which contains phreatobia [25] …   Lexicon of Cave and Karst Terminology

• Sediment — Cobbles on a beach River Rhône flowing into Lake Geneva …   Wikipedia

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• Ouachita madtom — Conservation status Vulnerable (IUCN 2.3) Scientific classification Kingdom …   Wikipedia

• Hydroponics — (from the Greek words hydro (water) and ponos (labour) is a method of growing plants using mineral nutrient solutions, without soil. Terrestrial plants may be grown with their roots in the mineral nutrient solution only or in an inert medium,… …   Wikipedia

• Constructed wetland — Vertical Flow type of Constructed Wetlands A constructed wetland or wetpark is an artificial wetland, marsh or swamp created as a new or restored habitat for native and migratory wildlife, for anthropogenic discharge such as wastewater,… …   Wikipedia

• Trickling filter — A trickling filter consists of a fixed bed of rocks, gravel, slag, polyurethane foam, sphagnum peat moss, or plastic media over which sewage or other wastewater flows downward and causes a layer or film of microbial slime to grow, covering the… …   Wikipedia

• Afghan National Air Corps — Infobox Military Unit unit name= Afghan National Air Corps caption=The Afghan National Air Corps on parade dates= 1924 country= Afghanistan allegiance= Afghan National Army branch= type= role= size= 45 aircraftAnon. (12 April 2007)… …   Wikipedia

• Italy — /it l ee/, n. a republic in S Europe, comprising a peninsula S of the Alps, and Sicily, Sardinia, Elba, and other smaller islands: a kingdom 1870 1946. 57,534,088; 116,294 sq. mi. (301,200 sq. km). Cap.: Rome. Italian, Italia. * * * Italy… …   Universalium

• Crusher — For other uses, see Crusher (disambiguation). A crusher is a machine designed to reduce large rocks into smaller rocks, gravel, or rock dust. Crushers may be used to reduce the size, or change the form, of waste materials so they can be more… …   Wikipedia