ABSTRACT
This case study examines the economic dimensions of current and proposed land use practices in upland rainfed agricultural areas in northern Thailand. The study area has been occupied and used for upland cultivation for more than two decades and now suffers from land degradation. The study is concerned with the effects of land degradation, especially soil erosion, and examines both on-site and off-site effects. The main site of 1,300 rai (208 ha) is representative of the average situation in the northern upland region. Within that area, the study focuses on a site of 7 rai (1.12 ha), which is the size of the average farm (1 rai = 0.16 ha).
