Sugarcane can grow well in the alluvial soil. It should be rich in

1. Nitrogen
2. Calcium
3. Phosphorus
4. All the above

The fine plucking is associated with

1. coffee
2. tea
3. rubber
4. cotton

Winnowing is associated with

1. rice crop
2. cotton crop
3. soya bean
4. wheat crop

What are the climatic conditions that favour the cultivation of cotton?