International Innovative Agricultural Science Course (IIAS)

Welcome to Tropical Agriculture and Forestry Workshop


We have been studying sustainable agriculture, agroforestry, and forest resource management in the tropics, Our Workshop aims to share and exchange information and experiences of appropriate technologies on agriculture and forestry with interdisciplinary participants, and improve our skills and practices, appropriate technologies, and extension services in the fields.
The workshop also aims to develop our self-learning, communication, and ability to take action.


Contact: Yosei OIKAWA (e-mail: yosei (at)

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Weekly Seminars

Weekly seminar series in TUAT


We have weekly seminar meetings to share information on sustainable agriculture, agriculltural and agroforestry extension. Participants report their progress of ongoing research projects.
Keywords: Sustainable agriculture/agroforestry/forestry, charcoal application, lowinput farming, soil amendment, agricultural extension and education, etc.

Thesis Titles

The following table shows thesis titles of previous workshop members.


Year Thesis titles
Sept. 2023 The impacts of organic certification on natural tea producers in Hoang Su Phi District, Ha Giang Province, Vietnam
Sept. 2023 Technical improvements of rice seed production in Battambang Province, Cambodia
Mar. 2023 Mapping the potential distribution of Japanese Oak Wilt in the Kanto Region using Maxent
Mar. 2023 Adopting Dalbergia cochinchinensis to homegarden agroforestry in Pursat province, Cambodia
Mar. 2022 The effects of weed biochars on seed germination and early seedling growth of lettuce and white clover
Mar. 2020 The effects of changes in cow dung use by LPG adoption on women's livelihoods and fertilizer use in rural India
Mar. 2020 The effects of qualification of agricultural science teachers on the performance of secondary school students in examinations and farming
Sept. 2019 The effect of agroforestry systems on REDD+ reference levels: A case study in Riau Province, Indonesia
Sept. 2019 The effect of addition of rice husk charcoal and wood vinegar on the quality of bokashi made from cow manure by an anaerobic method
Sept. 2018 Enhancing rice farmers’ income through Agricultural Cooperative and Contract Farming Scheme in Cambodia
Mar. 2018 Hydrogel application combined with clay pot irrigation for sustainable water-saving agriculture in Cambodia's dry season
Sept. 2017 Constraints of vegetable production by smallholder farmers in Cambodia: A case study in Rolea B’ier District, Kampong Chhnang Province
Sept. 2017 Effect of growing media from cow dung and sawdust biochar on the growth of ginger (Zingiber officinale Roscoe) rhizome
Sept. 2017 Impact of Salibu rice cultivation on rice yield, input, and profitability in Muara Enim Regency, South Sumatra Province, Indonesia
Sept. 2016 Effect of rice husk biochar and organic fertilizer on soil properties and rice productivity in Cambodia
Mar. 2015 Farmers' perceptions on soil degradation problems and introduction of biochar amendment as a potential solution: A case study in Southern Shan State of Myanmar
Mar. 2015 Effects of aquatic worms on paddy soil and the growth of rice
Sept. 2014 Effects of biochar from Chromolaena odorata and rice husk combined with organic and inorganic fertilizers on soil property and crop biomass
Mar, 2014 Introduction and improvement of low-input rice farming technology in central Vietnam
Mar. 2013 Influence of rice husk charcoal on characteristics of organic fertilizer and crop yields
Sept. 2010 Impact of floodplain vegetation changes and of Mimosa pigra invasion on fisheries production in the Tonle Sap Lake, Cambodia
Sept. 2009 Oil palm development and its benefits to local residents in Sihanoukville, Cambodia
Sept. 2009 Factors affecting farmers' adoption of organic rice cultivation in Cambodia
Mar. 2009 School garden development in Zimbabwe
Sept. 2008 Agricultural expansion and its effects on breeding habitat of Giant Ibis Pseudibis gigantea in Kulen Promtep Wildlife Sanctuary, northern Cambodia
Sept. 2008 Socioeconomic aspects of agroforestry in buffer zone of Way Kambas National Park, Sumatra, Indonesia
Mar. 2008 Participatory forest conservation Way Kambas National Park, Sumatra, Indonesia
Sept. 2007 Effect of Bokashi on growth and yields of sweet corn and cabbage
Sept. 2006 Local livelihoods and agricultural land use in Seima Biodiversity Conservation Area, Cambodia
March 2006 Research and extension of silvopastoral system for forest conservation and rural development in West Timor (eastern Indonesia)
Sept. 2005 Local attitudes toward conservation in Seima Biodiversity Conservation Area, Mondulkiri Province, Cambodia
Sept. 2005 Effect of bio-fertilizers (bamboo charcoal & EM-bokashi) on the growth of upland rice and wheat


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  • (2023/04/13)Thesis titles were updated.