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Mower
A mower is a person or machine that cuts (mows) grass or other plants that grow on the ground. Usually mowing is distinguished from reaping, which uses similar implements, but is the traditional term for harvesting grain crops, e.g. with reapers and combines.
A smaller mower used for lawns and sports grounds (playing fields) is called a ''lawn mower'' or ''grounds mower'', which is often self-powered, or may also be small enough to be pushed by the operator. Grounds mowers have reel or rotary cutters.
Larger mowers or ''mower-conditioners'' are mainly used to cut grass (or other crops) for hay or silage and often place the cut material into rows, which are referred to as ''windrows''. ''Swathers'' (or ''windrowers'') are also used to cut grass (and grain crops). Prior to the invention and adoption of mechanized mowers, (and today in places where use of a mower is impractical or uneconomical), grass and grain crops were cut by hand using scythes or sickles.
==Mower configurations==
Larger mowers are usually ''ganged'' (equipped with a number or gang of similar cutting units), so they can adapt individually to ground contours. They may be powered and drawn by a tractor or draft animals. The cutting units can be mounted underneath the tractor between the front and rear wheels, mounted on the back with a three-point hitch or pulled behind the tractor as a trailer. There are also dedicated self-propelled cutting machines, which often have the mower units mounted at the front and sides for easy visibility by the driver. ''Boom'' or ''side-arm'' mowers are mounted on long hydraulic arms, similar to a backhoe arm, which allows the tractor to mow steep banks or around objects while remaining on a safer surface.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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