UPSC CDS 2 2019 GK Paper

(d) Cultivation of cotton requires a growing period of atleast 200 frost free days, and not just 100 frost free days. Other requirements for cotton cultivation include, temperature reaching 25∘C or more in summer, moderate to light rainfall (55−100cm) , medium loam soil with good drainage and high water retention capacity.
Rainfall during harvesting season is harmful for its production. India is the largest producer of cotton in the world.