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Cotton
Cotton is a soft, staple fiber that grows around the seeds of the cotton plant (Gossypium sp.), a shrub native to tropical and subtropical regions around the world, including India and Africa. more...
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The fiber most often is spun into yarn or thread and used to make a soft, breathable textile, which is the most widely used natural-fiber cloth in clothing today. The English name which began to be used circa 1400, derives from the Arabic (al) qutn قُطْن, meaning cotton. In the 1800s and 1900s cotton was called \"King Cotton\" because of the great power it had in the economy.
Cotton fiber, once it has been processed to remove seeds (ginning) and traces of honeydew (a secretion from aphids), protein, vegetable matter, and other impurities, consists of nearly pure cellulose, a natural polymer. Cotton production is very efficient, in the sense that only ten percent or less of the weight is lost in subsequent processing to convert the raw cotton bolls (seed cases) into pure fiber. The cellulose is arranged in a way that gives cotton fibers a high degree of strength, durability, and absorbency. Each fiber is made up of twenty to thirty layers of cellulose coiled in a neat series of natural springs. When the cotton boll is opened, the fibers dry into flat, twisted, ribbon-like shapes and become kinked together and interlocked. This interlocked form is ideal for spinning into a fine yarn.
Leading cotton-producing countries
As of 2007, the ten largest producers of cotton in the world are (1) China, (2) India, (3) the United States, (4) Pakistan, (5) Brazil, (6) Uzbekistan, (7) Turkey, (8) Greece, (9) Turkmenistan, and (10) Syria.
The five leading exporters of cotton are (1) the United States, (2) Uzbekistan, (3) India, (4) Brazil, and (5) Burkina Faso. The largest non-producing importers are Bangladesh, Indonesia, Thailand, Russia, and Taiwan.
In India, the states of Maharashtra (26.63 %), Gujarat (17.96 %) and Andhra Pradesh (13.75 %) are the leading cotton producing states , these states have a predominantly tropical wet and dry climate. In the United States, the state of Texas leads in total production while the state of California has the highest yield per acre in the world.
Cultivation
Successful cultivation of cotton requires a long frost-free period, plenty of sunshine, and a moderate rainfall, usually from 600 to 1200mm (24 to 48 inches). Soils usually need to be fairly heavy, although the level of nutrients does not need to be exceptional. In general, these conditions are met within the seasonally dry tropics and subtropics in the Northern and Southern hemispheres, but a large proportion of the cotton grown today is cultivated in areas with less rainfall that obtain the water from irrigation. Production of the crop for a given year usually starts soon after harvesting the preceding autumn. Planting time in spring in the Northern hemisphere varies from the beginning of February to the beginning of June. The area of the United States known as the South Plains is the largest contiguous cotton-growing region in the world. It is heavily dependent on irrigation water drawn from the Ogallala Aquifer.
Read more at Wikipedia.org
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