タイのコメ生産費の地域・作期格差および時系列変化とその意義

Abstract

Based on my paper regarding the method of collecting, estimating and presenting the rice production cost of Thailand appeared in the twenty first issue of this journal, inter-regional, inter-seasonal and time series analysis of the cost is conducted. The major findings are as follows: 1. The main-season production cost in real term has declined by about twenty percent from 1973 to 1987. The off-season cost in real term has also declined by about forty percent from 1974 to 1987. 2. It is found from the comparison of rice production cost structures between main-season and off-season that the production technologies used in these two seasons are very different. In main-peason, rice is produced using large amount of labor and draft animals, while using almost no modern inputs such as fertilizers and chemicals. In the off-season, however, modern and intersive rice production technology using machines, fertilizers, and chemicals is used. 3. The off-season average production cost per unit of paddy produced is about twenty percent cheaper than main-season, mainly because paddy yield in off-season is about twice as large as main-season. 4. Inter-regionally, paddy has been produced at highest cost in the Northeast Region, and at the lowest cost in the North Region.