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JIRCAS Mail Magazine No. 44 (June 2023)
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There have been increasing opportunities to present the results of JIRCAS research at international meetings.

● The research results on methane gas absorption/release in tropical rainforests and BNI-enabled wheat were presented at the 15th Research Dialogue of the United Nations Framework Convention on Climate Change (UNFCCC) Bonn Climate Change Conference held in Bonn, Germany.
https://www.jircas.go.jp/en/reports/2023/r20230613

● The BNI-enabled wheat was also introduced at the G7 Miyazaki Agriculture Ministers Meeting to ministers and government officials of various countries and officials of international organizations such as FAO.
https://www.jircas.go.jp/en/reports/2023/r20230428

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■ Latest Topics
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● Joint Regional Meeting with the Mekong River Commission on Intermittent Irrigation
A regional conference on the irrigation method of repeatedly flooding and dropping water on paddy fields (intermittent irrigation) was held jointly with the Mekong River Commission.
https://www.jircas.go.jp/en/reports/2023/r20230608

● SATREPS Burkina Faso Releases Four Technical Manuals as Research Output
The SATREPS project "Construction of a Model to Promote Fertilizer Cultivation Using Burkina Faso Phosphate" was successfully completed in April 2023.
Four technical books summarizing the results of the research were published and handed over to relevant local institutions.
https://www.jircas.go.jp/en/reports/2023/r20230529_0

● JIRCAS Project Proposal Provisionally Selected for SATREPS Program
The selected project aims to develop and socially implement technologies to reduce methane emissions through rice-paddy water management in Cambodia.
https://www.jircas.go.jp/en/reports/2023/r20230519

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■ New Technologies and Research Outputs
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● Machine learning predicts nutrient concentrations in tropical island rivers
The concentrations of nutrients such as nitrogen, phosphorus, and silicon in major rivers on Ishigaki Island were predicted with high accuracy.
This information can be used to appropriately manage the amount of nutrients flowing in from land areas and to develop policies to conserve coastal ecosystems.
https://www.jircas.go.jp/en/publication/research_results/2022_a10
https://www.jircas.go.jp/en/release/2023/press202302

● Game theory predicts changes in community values regarding resource allocation held by Subaks in Bali
While the water users' association in Bali, Indonesia is known for its cooperative allocation of water resources, a decrease in the number of workers is affecting water use.
A game-theoretic analysis of values in resource use predicts that while there is currently a value placed on maintaining cooperative relationships, a change in values due to a decrease in the number of workers would lead to non-cooperative resource allocation.
https://www.jircas.go.jp/en/publication/research_results/2022_a05

● A curve number estimation model to accurately calculate reservoir inflow
In sub-Saharan Africa, 95% of farmers depend on rainwater for agriculture, and if water overflowing from reservoirs can be used for irrigation, agricultural productivity can be expected to increase. Using the curve number estimation model, which can estimate the amount of water that flows into reservoirs as a result of rainfall can be measured, it is now possible to precisely calculate the amount of runoff.
https://www.jircas.go.jp/en/publication/research_results/2022_b12

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【Edited and Published by】
Information and Public Relations Office
Japan International Research Center for Agricultural Sciences (JIRCAS)
1-1 Ohwashi, Tsukuba, Ibaraki 305-8686, Japan