The new greenhouse gas calculator named SECTOR (Source-selective and Emission-adjusted GHG CalculaTOR for Cropland) is based on the IPCC Tier 2 approach for rice as well as other crops. The new...
Rice is a staple crop in Bangladesh, with around 75% of agricultural land used to cultivate rice. The common practice of continuously flooding rice paddies creates the anaerobic conditions in which methane is produced. This method is also costly for resource-poor farmers, requiring fuel to power irrigation pumps and as much as 5,000 litres of water to produce just one kilogram of rice.
Research from IRRI has found that the 'Alternate Wetting and Drying' (AWD) rice cultivation technique has the potential to reduce paddy rice emissions by half and help farmers manage their resources more efficiently. Instead of keeping their fields continuously flooded, farmers drain rice paddies two to three times during the growing season. This limits the amount of methane that is produced, does not compromise yield, and saves money for farmers, as it requires a third less water.
Since 2004, the AWD technique has been promoted to small groups of farmers for testing, evaluation, and adoption. However, the total benefit, in terms of amount of water conserved and greenhouse gas emissions reduced, will only be significant if the AWD technique is adopted at scale. This is why the Coalition is supporting organisations such as IRRI to promote the benefits of the technique and enable adoption.