Watering the crops in the fields is called ‘irrigation’. Irrigation is done at different intervals. Irrigation should be done in a way in which water does not get wasted. Different sources of irrigation are like- wells, tube-wells, ponds, rivers. Two such methods which conserve water are:(i) Sprinklers: Sprinklers work like fountains. Long perpendicular pipes having rotating nozzles on the top are joined to the main pipe lines at regular distances. When water is supplied, it comes out of these rotating nozzles which sprinkle water in all directions. Limited outflow of water, controls wastage of water. This method is more suitable for uneven and sandy soil.(ii) Drip System: This system allows the water to flow drop by drop at the roots of the plants. It contains a main pipe which has further lateral pipes containing small nozzles for the outflow of the water. Nozzles are such placed that they throw water at the roots of the plants, which saves water from flowing around uselessly. This technique is best suited for watering fruit plants, gardens and trees where availability of water is poor."