Recultivation of cleared and abandoned sites in the Amazon by agroforestry systems, a SHIFT - project.

The agroforestry systems for the Amazonia region provide better conditions for the development of usefull plants than the monoculture wich has been conducted according to common practice. The plantation of annual and perennialc cultures permits the use of only on area for several years without cutting new areas, in case of the rubber trees until 25 years. The use of fertilizer and biological agents like VAMF, which can improve the physical and chemical soil conditions, allow the recultivation of cleared and abandoned sites with great economical returns. This reduce the 'slash and burn' agriculture, as practised by the local small holders, the environmental destruction and the rural exodus