Irrigation by drip or trickle is sometimes called drip irrigation

It drips water into the soil at very low rates (2-20 liters/hour) using a system of small diameter plastic pipes equipped with outlets known as emitters or drippers. Drip irrigation is sometimes referred to as trickling irrigation. In contrast to surface and sprinkler irrigation, which includes watering the entire soil profile, water is supplied near to the plants so that just the area of soil where the roots develop is moist. When compared to other approaches, drip irrigation uses water applications more frequently (typically every 1-3 days), which creates a very favourable high moisture level in the soil where plants can thrive.

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