Which of the following methods of irrigation is known as trickle irrigation?

Correct option is C

The correct answer is (C) Drip irrigation

Explanation:
• Drip irrigation is alternatively referred to as trickle irrigation. It is a highly efficient micro-irrigation system that saves significant amounts of water and nutrients by allowing water to drip slowly to the roots of plants.
• The mechanism delivers water either directly onto the soil surface around the root zone or directly into the root zone via a networks of valves, pipes, tubing, and emitters.
• It dramatically minimizes evaporation losses, surface runoff, and weed development because water is applied uniformly and precisely where required.

Information Booster:
• India promotes micro-irrigation systems aggressively under the 'Pradhan Mantri Krishi Sinchayee Yojana' (PMKSY) with the dedicated motto of 'Per Drop More Crop' to conserve groundwater resources.

Additional Knowledge:
• Sprinkler irrigation (Option A): A method where water is sprayed into the air through nozzles, mimicking natural rainfall; suitable for uneven terrains but has higher evaporation rates than drip systems.
• Sub-irrigation (Option B): A method where the water table is artificially raised beneath the plant roots, allowing the soil to absorb moisture upward via capillary action.
• Bubbler irrigation (Option D): A system designed to deliver water to small basins or individual plants through small streams of water, running at a higher flow rate than drip emitters.