What is irrigation ? Describe two methods of irrigation which conserve water

What is irrigation ? Describe two methods of irrigation which conserve water
**A .**Supply of water to crops at appropriate intervals is called Irrigation.
Two methods of irrigation are :
(a) Sprinkler system - Where water is sprinkled on the crops as if it is raining.
(b) Drip system - In this system, the water falls drop by drop just at the position of the roots.