Greenhouse Gas Mitigation in Irrigated Rice Paddies in Southeast Asia Part 3 (MIRSA-3): Development of comprehensive rice cultivation technologies that reduce greenhouse gas emissions in Asia

is a research subject in MAFF’s Strategic Project-research Promotion Project Development of greenhouse gas reduction technologies in the agricultural sector through international collaboration. MIRSA-3 is a joint research collaboration among the Institute for Agro-Environmental Sciences (NIAES), Japan International Research Center for Agricultural Sciences (JIRCAS), International Rice Research Institute (IRRI), University of Agriculture and Forestry, Hue University (HUAF), Philippine Rice Research Institute (PhilRice), and Indonesian Agricultural Environment Research Institute (IAERI). It is the third part of MIRSA which started in 2012, funded by the Ministry of Agriculture, Forestry and Fisheries (MAFF) of Japan. MIRSA Part 1 has quantified and linked the potential of alternate wetting and drying (AWD) irrigation management and GHG emission reduction in irrigated rice paddies. It also developed the guidelines on the effective implementation of AWD at multiple locations in Southeast Asia to achieve the emission reduction target of 30%. MIRSA Part 2 focused on field demonstrations and consolidation of procedures, which gave way to the Handbook of Monitoring, Reporting, and Verification for a Greenhouse Gas Mitigation Project with Water Management in Irrigated Rice Paddies. Now, with MIRSA Part 3, the focus is to develop a comprehensive mitigation technology for rice paddies that reduces GHG emissions by 30%, as well as conserves soil fertility and supports stable rice productivity by integrating water management, fertilizer application, and organic amendment.


The Global Long-Term Agricultural Experiment Network (GLTEN) is an international network of long-term (≥ 10 yr) agricultural experiments associated with researchers spanning six continents and representing a range of climates, environments, cropping systems and farming practices. IRRI is an active part of this network through the IRRI Long term continuous cropping experiment (LTCCE).

Asian Long-Term Experimental Network for Agricultural (ALTENA)

is a research consortia consisting of scientists who are involved in agricultural long-term field experiments with a focus on soil or plant-soil interaction. It was launched on March 1, 2017 in Tsukuba, Japan by during the NARO-MARCO international symposium on "Soil carbon sequestration: Needs and prospects under the 4 per 1000 initiative". IRRI is a member of this network.

Thesis studies in collaboration with the University of Twente, Faculty of Geo-Information Science and Earth Observation

The students used descriptive statistics to become familiar with the field & UAV data, then applied machine learning methods to identify useful relationships between spectral information in the UAV imagery and plant nitrogen and dry weight. The relationships were used to estimate plant nitrogen and plant weight at the plot level.