many cases, studies of fuelwood have been carried out without reference to
broader patterns of local tree-growing and tree product utilization. The
economic value of products from agroforestry systems have rarely been
measured in the field. Yet without such information, identifying agroforestry
research priorities in terms of land use systems, agroforestry technologies, or
sites is difficult. Agroforestry programmes need to expend relatively more
resources on direct data collection on-farm, and collaborate with official data
collection agencies in developing basic datasets.