Irrigation in India is indispensable for sustained agricultural development because of

1. ever increasing demand of food crops
2. India experiences tropical monsoon climate which is unevenly distributed, unreliable and erratic in nature
3. There is a large variety of crops grown in India
4. Scarcity of rainfall

The perennial canals can be built in the areas of

1. uneven terrain
2. low level relief with deep fertile soil
3. in the deltaic regions
4. in the mountainous relief

The tank irrigation is practiced mostly in

1. Punjab
2. Uttarakhand
3. Haryana
4. Tamil Nadu

A tube well is a

1. borewell
2. pond
3. lake
4. surface well