VIABILIDADE ECONÔMICA DO SISTEMA AGROFLORESTAL GREVÍLEA X CAFÉ NA REGIÃO NORTE DO PARANÁ

In the 70´s, Grevillea robusta was introduced as windbreaks into coffee plantations in the Northern region of the State of Parana, Brazil. This paper aimed to analise the economic feasibility of this agroforestry system, by comparing it with the previous situation of single coffee cultivation. A software called SAAC was applied in order to calculate cash flows and profitability parameters, such as Net Present Value (VLP), Internal Rate of Return (TIR), Income-Cost Ratio (RRC), and Annual Equivalent Value (VEA). The results showed that this tree species can be introduced into the system at a very low costs and only using marginal area, 58 tree per hectare. Although all parameters have shown small but positive gains, the important economic aspect found was that, at the end of rotation period, net income could increase 32,22%, allowing farmers to forward resources for a 1