The chestnut PPP Project sought to evaluate aspects related to the productivity of Brazil nuts and Brazil nut trees in the southern region of the state of Amapá. Based on these aspects, subsidies were generated for the formulation of plans for the sustainable use of the species, as well as a management plan for the Rio Cajari Extractive Reserve (RESEX Cajari) was implemented.

The extractivism activity in the reserve is mainly characterized by the extraction of Brazil nuts, therefore, in addition to Brazil nut trees the types of areas were also assessed throughout the project (areas of swiddens and capoeira found outside the brazil nuts trees area), nutrients, soils and matrix vegetation related to Brazil nut trees area.