Title: Rice Paddies in China
Credit: University of New Hampshire
Caption: In 1990 there were 29.3 million hectares of rice paddy crops in China, as depicted by the shaded areas. The darker shaded areas indicate a higher concentration of rice paddy fields in an area.


Title: Modeled Methane Emissions from Rice Agriculture in China
Credit: University of New Hampshire
Caption: This image represents the amounts of methane emitted by rice paddy fields at a county scale as determined by a simulation from the Denitrification-Decomposition (DNDC) computer model. The scale on the left represents the CH4 (methane) flux rate in units of kilograms (kg) of CH4 per hectare (ha) of county area. The darker purple areas show where the higher levels of methane were emitted from rice crops in China in 1990. The researchers found that the change in water management practices reduced China's methane emissions by about 40% from 1980 to 2000.