The most extensive areas under irrigated paddy are in Indonesia, followed by Viet Nam, the Philippines and Thailand. The largest area under upland paddy is also in Indonesia, and significant amounts of land are planted in flood-prone areas in Cambodia, Myanmar and Viet Nam. While the per capita demand is expected to decrease in the future, total demand for paddy in Southeast Asia is expected to increase to more than 160 megatonnes per year by 2020 due to population growth (Mutert and Fairhurst, 2002).