This project has by objective the quantification of water and nutrient fluxes in an experimental plantation, which is composed of different monoculture and polyculture systems with mainly perennial crops, as well as in primary and secondary forest at EMBRAPA-CPAA (Manaus, AM, Brasil). The flux measurements are expected to provide information about the efficiency with which the different land use systems exploit the available resources (water, nutrients) on the infertile soils of the area and minimize unproductive losses, e.g., through leaching. Efficient resource utilization is seem as a procondition of sustainable land use on this site.bitstream/item/180848/1/ID-4004-2.pdfAnnual Report 1995. BMF N.00396641 5