Harrow, borough, Greater London, England

Harrow, outer borough (1991 pop. 194,300) of Greater London, SE England. For centuries Harrow grew foodstuffs for London. It is mainly residential and contains parts of the Green Belt, areas set aside as parkland. Optical and photographic goods and glass are manufactured. The famous Harrow public school, founded in 1571, is in the borough. Among its graduates were the writers George Byron Byron, George Gordon Noel Byron, 6th Baron (bī`rən)
..... Click the link for more information. and John Galsworthy Galsworthy, John (gôlz`wûrthē, gălz`–), 1867–1933, English novelist and dramatist.
..... Click the link for more information. and the statesmen Sir Robert Peel Peel, Sir Robert, 1788–1850, British statesman. The son of a rich cotton manufacturer, whose baronetcy he inherited in 1830, Peel entered Parliament as a Tory in 1809.
..... Click the link for more information. and Henry Palmerston Palmerston, Henry John Temple, 3d Viscount, 1784–1865, British statesman. His viscountcy, to which he succeeded in 1802, was in the Irish peerage and therefore did not prevent him from entering the
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harrow, in agriculture

harrow, farm implement, consisting of a wooden or metal framework bearing metal disks, teeth, or sharp projecting points, called tines, which is dragged over plowed land to pulverize the clods of earth and level the soil. Harrows are also used to uproot weeds, aerate the soil, and cover seeds. Primitive harrows were twiggy branches drawn over the soil to smooth it; in India a ladderlike device of bamboo is still used. In modern large-scale farming, harrows are of varied types. Some are simply dragged behind a tractor or draft animal; some are suspended on wheels; many have levers to adjust the depth of the cut. There may be one or more gangs (sets) of cutting parts per harrow, and one or more harrows may be drawn at a time. In disk harrows, which next to the plow are the most widely used tillage implements, the saucer-shaped disks are set at angles to the line of pull for maximum pulverization. Spike-tooth harrows have rigid teeth, and spring-tooth harrows have curved tines that adjust to obstacles. The rotary crossharrow has power-driven rotating toothed disks; another type of harrow slices through topsoil and vegetation with curved knives. In general, the harrow is similar to the cultivator cultivator, agricultural implement for stirring and pulverizing the soil, either before planting or to remove weeds and to aerate and loosen the soil after the crop has begun to grow. The cultivator usually stirs the soil to a greater depth than does the harrow .
..... Click the link for more information. , except that it penetrates the soil to a lesser depth.

Bibliography

See M. Partridge, Farm Tools through the Ages (1973); C. Culpin, Farm Machinery (11th ed. 1986).

Harrow

a borough of NW Greater London; site of an English boys' public school founded in 1571 at Harrow-on-the-Hill, a part of this borough. Pop.: 210 700 (2003 est.). Area: 51 sq. km (20 sq. miles)

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Harrow, borough, Greater London, England

harrow, in agriculture

Bibliography

Harrow