Which irrigation practice leads to maximum water conservation?

The correct answer is Drip irrigation

Key Points

• Water wheel: It is a machine used for converting the energy of flowing water into some useful form of power.
• Tubewell: Irrigation through tubewell is mainly based on an underground aquifer which results in water scarcity if used for a long time.
• Drip irrigation: It is a type of micro-irrigation system used for saving water and nutrients by allowing water to drip slowly to the roots of the plants. 
• Sprinklers: It is a device used to irrigate crops by applying water in a controlled manner similar to rainfall.