Closing Rice Yield Gaps in Asia SDC supports the International Rice Research Institute (IRRI) and its national research and extension partners in six major rice granaries of Asia (China, Indonesia, Myanmar, Sri Lanka, Thailand, and Vietnam) to develop science-based, quantitative tools and participatory methods to i) generate evidence, and ii) optimize ‘integrated sustainable irrigated rice production systems’ in order to close rice yield gaps and thereby enhance regional and global food security while minimizing the environmental footprint of irrigated rice production.