The North-West Mato Grosso region (Brazil) is at the heart of the Amazon arc of deforestation: the livestock sector is gradually pushed North with the advanced of annual crops (soybean, maize, cotton, rice, sugar cane). Fazenda São Nicolau is the Peugeot/ONF Forest Carbon Sink project headquarters since 1999. It is a regularized property of 10,000 ha in the heart of Amazon arc of deforestation. It reflects a long-term commitment to the development and dissemination of good practices for sustainable management of rural properties. It is a unique tool with 1,800 ha afforestation from 51 species, planted between 1999 and 2004.