The second surface method is furrow irrigation. Furrow irrigation is used for crops planted in rows. Furrows are dug across the field and seeds are planted between the furrows. As water is let into the furrows it seeps into the ridges. The second method of irrigation is called sprinkler irrigation.
Water is pumped through the sprinkler heads in a spray or mist to water the crops.
The next method is trickle irrigation. The plants are watered from plastic tubes that have openings right near the plants so this method wastes little water. The final method is called sub irrigation. The plants get water from underground pipes or ditches.