Sub-surface drip irrigation (SDI) systems are most suitable for large-scale potato field operations. Compared with on-surface systems, SDIs deliver additional benefits such as lower labour requirements, protection from agro-machinery interference, and enhanced water-use efficiency.
One of the biggest advantages of SDI is that it is not wetting the canopy, resulting in significantly reduced leaf disease.
On-surface systems are best for small to medium-scale potato growers, or for use on extremely sandy soil plots. They’re also a great option for plots that are deep-tilled. But bear in mind that while they require a lower initial investment, they do carry a higher operational cost.