Question

Climatic conditions required for cotton are tropical and subtropical. Justify.

Answer 1

Hint: 1)The word "cotton" refers to the portion of the cotton plant that grows in the boll-the soft cotton fibres envelope.
2)Most frequently, the fibre is spun into yarn or thread and used to produce a cloth that is fluffy and breathable.

Complete answer:
Cotton, a perennial, grows in tropical and subtropical areas. In regions that have extended dry or rainy spells, it does not do well. In the season, planting takes place after all the danger of frost has passed. For cotton seeds to successfully germinate, the soil temperature must be 60 degrees Fahrenheit or higher. Usually, the harvest of cotton bolls starts about 150 to 200 days after planting.

A height of 15 to 20 feet can be reached by cotton plants. The temperature should hover between 90 and 95 degrees Fahrenheit under ideal rising conditions. A deep and extensive root system is formed by the plant that makes it tolerant of drought. According to the University of Florida IFAS Extension, the roots can grow as much as 1/2 inches per day. The growth of the plant slows or stops if the temperature drops below 60 degrees or above 100 degrees. High temperatures above 85 degrees during the night will make the plant sterile.

Good cotton cultivation needs a long freezing time, plenty of sunlight, and moderate rainfall, typically between 60 and 120 cm (24 to 47 in)[citation required]. Soils typically need to be reasonably heavy, but there is no need for the nutrient level to be exceptional. In general, these conditions are encountered in the Northern and Southern hemispheres of the seasonally dry tropics and subtropics.

Thus tropical and subtropical climatic conditions are required for cotton.

Note: The use of cotton for cloth is believed to date to prehistoric times; in the Indus Valley Civilization, fragments of cotton fabric dated to the fifth millennium BC were found, as well as fabric remains dated back to 6000 BC in Peru. It was the invention of the cotton gin, although cultivated since ancient times, that reduced the cost of production that led to its widespread use, and it is the most widely used natural fibre fabric in clothing today.