Overview of AWD
Alternate wetting and drying (AWD) is a management practice in irrigated lowland rice that saves water and reduces greenhouse gas (GHG) emissions while maintaining yields.
Under the best management practice developed by IRRI water scientists, the AWD water regime starts two weeks after transplanting. The rice field is left to dry, but only to a point when there is still sufficient water in the soil for sustained plant growth. The soil water content can easily be monitored, so that the farmer can re-flood the field once a certain water level (e.g. 15 cm below the soil surface) is reached. Then, the field is re-flooded to a water depth of about 3-5 cm before draining again. This cycle is done repeatedly except during flowering stage of crop growth when the plants are very sensitive to dry conditions and field is kept in flooded conditions.
- Publisher: International Rice Research Institute
- Language: English
- Pages: 2 pages