s:451:"%T Agro-ecosystems, their population densities and land cover in Indonesia in the context of upland-lowland relationships %A Hadi D P %A Van Noordwijk M %X RUPES and similar programs relate to increasing interest in landscape level interactions between land users in uplands and lowlands. Basic data on the total area and the number of people involved in the various combinations of land use types are helpful in prioritising action research. ";