In areas where there is insufficient water, farmers may now ensure good yield from their rice plants by following the controlled irrigation technique (alternate wetting and drying) or by planting aerobic rice. Even in areas with sufficient irrigation water, farmers may also opt to decrease their water requirements by following the said technique without adverse effect on their yields.
Normally, farmers believe that continuous flooding is the key to good rice yield but this is not always the case as shown by the results collaborative studies conducted by Phi Rice, the National Irrigation Administration (NIA) and the International Rice Research Institute (IRRI).
Controlled Irrigation(CI) or alternate wetting and drying technology allows ricefields to dry up for some time. The rice plants are irrigated only when the soil moisture near the root zone is almost gone.