開発途上国における改良サツマイモ品種導入に影響を与える要因：文献レビュー

This literature review examines the factors influencing the adoption of improved sweet potato varieties (ISPVs) in developing countries. Drawing on 17 studies conducted primarily in Africa and South Asia, the review categorizes influencing factors into socio-economic, institutional, agronomic, post-harvest, psychological, geographic, environmental, and consumption-related domains. It highlights critical variables, including age, farm size, extension services, group membership, and agronomic traits such as yield and drought tolerance. The findings show that most studies rely on quantitative methods and cross-sectional designs, often neglecting temporal changes in farmers' behaviors and risk aversion. Despite the positive influence of training, education, and extension services, adoption barriers persist due to market instability and regional disparities. Notably, the review highlights the lack of integration between qualitative and quantitative methodologies, as well as the absence of longitudinal studies to explore dynamic adoption patterns. Researchers are advised to explore mixed methods approaches and consider longitudinal analysis and risk aversion factors to better understand the evolving determinants of ISPVs adoption.