|
Search over 100 encyclopedias and dictionaries: |
Research categories | Follow us on Twitter |
Research categories
View all topics in the newsView all reference sources at Encyclopedia.com |
|||
drainage
drainage in agriculture, the removal of excess water from the soil, either by a system of surface ditches, or by underground conduits if required by soil conditions and land contour. Diesel or centrifugal pumps are sometimes used to drain large areas. Drainage was practiced in the Nile basin c.400 BC and in ancient Rome. Today drain pipes of clay, concrete, or plastic, laid several feet underground, are much used in the United States, where c.110 million farm acres (44.5 million hectares) were artificially drained in 1987. Proper drainage improves soil structure; increases efficiency of phosphorus fertilizer; conserves soil nitrogen; and controls waterlogging, leaching, and salinization of soils caused by irrigation . |
|
|
Cite this article
"drainage." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. "drainage." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1E1-drainag-ag.html "drainage." The Columbia Encyclopedia, 6th ed.. 2011. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-drainag-ag.html |
|
drainage
drainage
1. The passage of water over and through the land surface, ultimately towards the sea. See dendritic drainage; deranged drainage; discordant drainage; drainage density; drainage pattern; inconsequent drainage; and superimposed drainage. 2. The process of removing the gravitational water from soil, using artificial or natural conditions, such that freely moving water can drain, under gravity, through or off soil. See mole drain and tile drain. |
|
|
Cite this article
MICHAEL ALLABY. "drainage." A Dictionary of Ecology. 2004. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "drainage." A Dictionary of Ecology. 2004. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O14-drainage.html MICHAEL ALLABY. "drainage." A Dictionary of Ecology. 2004. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O14-drainage.html |
|
drainage
drainage
1. The passage of water over and through the land surface, ultimately towards the sea. See DENDRITIC DRAINAGE; DERANGED DRAINAGE; DISCORDANT DRAINAGE; DRAINAGE DENSITY; DRAINAGE PATTERN; INCONSEQUENT DRAINAGE; and SUPERIMPOSED DRAINAGE. 2. Process of removing the gravitational water from soil, using artificial or natural conditions, such that freely moving water can drain, under gravity, through or off soil. See MOLE DRAIN; and TILE DRAIN. |
|
|
Cite this article
AILSA ALLABY and MICHAEL ALLABY. "drainage." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. AILSA ALLABY and MICHAEL ALLABY. "drainage." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O13-drainage.html AILSA ALLABY and MICHAEL ALLABY. "drainage." A Dictionary of Earth Sciences. 1999. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-drainage.html |
|
drainage
drain·age / ˈdrānij/ • n. the action or process of draining something: the pot must have holes in the base for good drainage | the drainage of wetlands. ∎ the means of removing surplus water or liquid waste; a system of drains. |
|
|
Cite this article
"drainage." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. "drainage." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O999-drainage.html "drainage." The Oxford Pocket Dictionary of Current English. 2009. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-drainage.html |
|
drainage
drainage (drayn-ij) n. the drawing off of fluid from a cavity in the body, usually fluid that has accumulated abnormally. See also drain.
|
|
|
Cite this article
"drainage." A Dictionary of Nursing. 2008. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. "drainage." A Dictionary of Nursing. 2008. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O62-drainage.html "drainage." A Dictionary of Nursing. 2008. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O62-drainage.html |
|
drainage
drainage
•damage
•image, scrimmage
•pilgrimage
•homage, West Bromwich
•plumage
•rummage, scrummage
•manage, mismanage, pannage, stage-manage
•carnage
•cranage, drainage
•spinach • concubinage • libertinage
•linage • nonage • coinage
•dunnage, tonnage
•orphanage • baronage • patronage
•parsonage • personage • Stevenage
•cozenage • seepage • slippage
•equipage • stoppage • warpage
•groupage
|
|
|
Cite this article
"drainage." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. "drainage." Oxford Dictionary of Rhymes. 2007. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O233-drainage.html "drainage." Oxford Dictionary of Rhymes. 2007. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O233-drainage.html |
|
Search over 100 encyclopedias and dictionaries:
HighBeam™ Research, Inc. © Copyright 2012. All rights reserved.
The Encyclopedia.com advertising network includes:
