2022 - 2025 Analysis on Rice Grain Quality of Recent Developed-/Released-Cultivars with Special Characters Based on the Structure of Reserve Substance
2022 - 2025 Applications of no-till seeder and transplanter to slash-and-mulching cultivation aiming at electrical and autonomous operations
2019 - 2022 Analysis of accumulation structure of rice produced in several areas of Fukushima prefecture with special reference to the differences of quality and palatability, and the effect of radioactive rays.
2018 - 2022 Studies on Rice Revolution in Kebbi State, Nigeria, through Sawah Technology
2017 - 2020 Rehabilitation of decontaminated soil using ecosystem multifunctionality
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Papers (39)：
Yoshikatsu Ueda, Yasuhiro Izumi, Yoshihiro Hirooka, Yoshinori Watanabe, Morio Iijima. Fine soil particle aggregation in ultra-fine bubble irrigated paddy fields. Water Supply. 2022
Morio Iijima, Yoshihiro Hirooka, Yoshimasa Kawato, Hitoshi Shimamoto, Koji Yamane, Yoshinori Watanabe. Close mixed-planting with paddy rice reduced the flooding stress for upland soybean. Plant Production Science. 2022. 1-7
Yoshihiro Hirooka, Shintaro Kurashige, Koji Yamane, Yoshinori Watanabe, Misako Kakiuchi, Daisuke Ishikawa, Taku Miyagawa, Kazuya Iwai, Morio Iijima. Effectiveness of direct application of top dressing with spent coffee grounds for soil improvement and weed control in wheat-soybean double cropping system. Plant Production Science. 2021. 1-9
Yoshihiro Hirooka, Tadayoshi Masuda, Yoshinori Watanabe, Yasuhiro Izumi, Hiroyuki Inai, Simon Awala, Morio Iijima. Agronomic and socio-economic assessment of the introduction of a rice-based mixed cropping system to Cuvelai seasonal wetland system in northern Namibia. Agrekon. 2021. 1-12
ARAKI Chie, WATANABE Yoshinori, YAMANE Koji, IIJIMA Morio. Effects of soil moisture conditions on the water relation and water source of intercropped rice and nearl millet. 2013. 82. 350-351
Obalum Sunday Ewele, Nwite J.C., Agboola A., Igwe C.A. 15-21 Comparative topsoil characterization of the representative inland valleys under the sawah system in Bida suburb, North Central Nigeria. Abstracts of the meeting, the Society of the Science of Soil and Manure. 2010. 56. 109-109
