Data are presented from a survey of the biophysical characteristics (topography, vegetation, climate) and socioeconomic conditions (land use preferences, income, population growth and cultural habits) in the buffer zone of this national park in Indonesia. Most of the land is used for plantations, or cleared for shifting cultivation or rice paddies. The environmental consequences of the different land usages are discussed. There is increasing pressure on the land from the high population densities, one of the probable consequences of which will be the destruction of the woodland in the nature reserve zone where hunting and clearing are not legally permitted. [With English tables.].