<p>AWD (Alternate Wetting and Drying) irrigation has been promoted and disseminated as methane- reducing, yield-enhancing and cost-reducing technology in the Vietnamese Mekong Delta rice-producing area. Construction of a full dike system has allowed farmers to implement AWD 3 crop seasons per year. Individual irrigation management, additional canal construction and diffusion of small pumps are enabling factors for AWD dissemination. AWD facilitates synchronization of cultivation operation, harmonized water management, collective rice sale and mutual learning among farmers.</p>