s:1016:"TI Research abstracts and key policy questions: environmental services and land use change 
AU Tomich T P 
AU Thomas D E 
AU van Noordwijk, M. 
AB As the Minister of Agriculture and Cooperatives, I am particularly pleased that ICRAF and this wide range of collaborating organizations have joined with Chiang Mai University toorganize this workshop in North Thailand. As a major center in this region for more than seven centuries, the Chiang Mai valley civilization has long depended on environmental services provided by the forested hills that surround it.Upstream from Chiang Mai, remote mountain communities have depended on forests for food and many other products, as well as to renew the productivity of their shiftingagriculture systems. Indeed, research findings published in what has become a classic book, Farmers in the Forest, provided a major advance in our understanding that sparked anew generation of research on traditional upland agriculture. The site of that researchwas not far from here. 
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