Today, most irrigation systems for orchards are built upon low-volume irrigation, driplines or mini sprinklers. The advantage of drip irrigation is that it is far more accurate and efficient.
Drip irrigation is especially critical during the initial years of a tree's growth. Each tree should be irrigated directly to the roots with zero water waste. When the root zone grows, more drippers should be added to the drip lines, or new drip lines should be added along the row with smaller spacing in between the emitters.
Drip lines could be laid on the surface soil or in the subsurface. Low volume mini sprinklers have an advantage when they irrigate a larger root zone, offering a strong solution for more mature trees.