mention two need for the growth of cotton plant
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Long vegetation periods (175 to 225 days) without frost.
Constant temperatures between 18 and 30°.
Ample sunshine and fairly dry conditions.
A minimum of 500 mm of water between germination and boll formation.
Deep, well-drained soils with a good nutrient content.
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Cotton is a plant that needs a long frost-free period, a lot of heat and plenty of sunshine. It prefers warm and humid climate. Cotton seeds will have a small germination rate, if the soil temperature is below 60°F (15°C). During activegrowth, the ideal air temperature is 70 to 100°F (21-37°C).
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