What are the merits and demerits of tank irrigation?
Merits:
- Most of the tanks are natural, making use of local mounds
and depressions. Hence it is cost saving.
- These are generally constructed on rocky bed and have a
longer life span.
- In some tanks fishing is also carried on which supplies food
and income to farmers.
Demerits:
- Drying up of tanks during dry season which is the most
required season of irrigation.
- Silting of tank bed.