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Dry Out the Methane. Green Up Your Harvest. Alternate Wetting and Drying (AWD) is an easy, low-cost water-saving method for growing rice. Instead of keeping the rice field continuously flooded, farmers let the field dry out for several days between irrigations. The timing is guided by a simple field water tube (often bamboo or a PVC pipe) installed in the paddy. When the water level inside this tube drops to 15 cm below the soil surface, it is time to irrigate again. This alternating cycle cuts water use by about 25–30%, and helps reduce methane (a powerful greenhouse gas). By using AWD, farmers save money on irrigation costs (less pumping or water fees) while producing the same amount of rice, making them more resilient to water scarcity.
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