The farming which involves cultivation of single agricultural crop over large tracts of land or estates is …………… .

1. Subsistence agriculture
2. Commercial agriculture
3. Plantation farming
4. Mixed farming

Tea, coffee, rubber or spices are …………… crops.

1. Plantation farming
2. Intensive farming
3. Extensive farming
4. Commercial farming

Why is agriculture said to be the backbone of the Indian economy?

Mention any three problems of agriculture in India.