The method of irrigation in which water reaches the root zone of the plants drop by drop is:
Centre Pivot irrigation
Drip irrigation
Sprinkler irrigation
Furrow irrigation
The method of irrigation in which water reaches the root zone of the plants drop by drop is called drip irrigation
Slow application of water drop by drop to the root zone of a crop is also called as drip irrigation.
Irrigation in which water is directed to roots of plants is called drip irrigation.