新疆棉花英文作文

Cotton textiles touch every aspect of our lives.Cotton is a soft fibre that grows around the seeds of the cotton plant . The fibre is most often spun into thread and used to make a soft, breathable textile.Cotton is a valuable crop because only about 10% of the raw weight is lost in processing. Once traces of wax, protein, etc. are removed, the remainder is a natural polymer of pure cellulose. This cellulose is arranged in a way that gives cotton unique properties of strength, durability, and absorbency. Each fibre is made up of twenty to thirty layers of cellulose coiled in a neat series of natural springs. When the cotton boll (seed case) is opened the fibres dry into flat, twisted, ribbon-like shapes and become kinked together and interlocked. This interlocked form is ideal for spinning into a fine yarn.Cotton has been used to make very fine lightweight cloth in areas with tropical climates for millennia. Some authorities claim that it was likely that the Egyptians had cotton as early as 12,000 BC, and they have found evidence of cotton in Mexican caves (cotton cloth and fragments of fibre interwoven with feathers and fur) which dated back to approximately 7,000 years ago. There is archaeological evidence that people in South America and India domesticated independently different species of the cotton plant thousands of years ago.The earliest written reference is to Indian cotton. Cotton has been grown in India for more than three thousand years, and it is referred to in the Rig-Veda, written in 1500 BC. A thousand years later the great Greek historian Herodotus wrote about Indian cotton: "There are trees which grow wild there, the fruit of which is a wool exceeding in beauty and goodness that of sheep. The Indians make their clothes of this tree wool." By the end of the 16th century BC, cotton had spread to warmer regions in Americas, Africa and Eurasia.Today, Cotton is produced in many parts of the world, including Europe, Asia, Africa, the Americas and Australia, using cotton plants that have been selectively bred so that each plant grows more fibre.For years, cotton clothing, home furnishings and industrial goods have enhanced our quality of life by providing comfort, expression and individuality. From towels to T-shirts, from bedding to blue jeans, cotton surrounds us on a daily basis.The cotton industry relies heavily on chemicals such as fertilisers and insecticides, although some farmers are moving towards an organic model of production, and chemical-free organic cotton products are now available. Historically, one of the most economically destructive pests in cotton production has been the boll weevil.Most cotton is harvested mechanically, either by a cotton picker, a machine that removes the cotton from the boll without damaging the cotton plant, or by a cotton stripper which strips the entire boll off the plant. Cotton strippers are generally used in regions where it is too windy to grow picker varieties of cotton and generally used after application of a defoliant or natural defoliation occurring after a freeze. Cotton is a perennial crop in the tropics and without defoliation or freezing, the plant will continue to grow. Premium cotton fiber quality is essential to high-tech spinning operations. Technologically advanced equipment requires fiber that spins into consistent, high-strength yarn at speeds unheard of just 15 years ago. As a result, textile mills now can spin nearly 600 pounds of cotton into yarn per spindle each year. Ten years ago, each spindle only transformed about 200 pounds of cotton. 字数多了,最后一段可以删除 ^_^,希望可以帮助你