Adoption, Spread, and Production Impact of Modern Rice Varieties in Asia

摘要

The degree to which modern rice varieties have been adopted in South and Southeast Asia and their production impact are assessed in this study. First, the introduction of modern rice varieties in major South and Southeast Asian rice producing countries, where they now constitute 80% of the total rice area, and their contribution to increased production are examined. It is noted that rice production in Bangladesh, Indonesia, South Korea, Pakistan, Thailand, and the Philippines increased more than 3% annually between 1972-79, largely due to the introduction of modern varieties starting in 1965, while production in Burma, India, and China increased only slightly more slowly. The study goes on to review earlier studies that describe patterns of variety adoption and develops a theoretical framework to classify factors affecting the adoption process. A review of studies analyzing these factors - personal variables, tenure, and economic variables such as credit and market prices - concludes the report.