This article starts from the recognition of the importance of maintaining extensive live-stock farming to conserve very valuable ecosystems. Extensive farming is characterized by low profit-ability and a strong dependence on Common Agricultural Policy (CAP) subsidies. A Logistic Biplot method was implemented to characterize livestock farms located within the Biosphere Reserve of the ‘Sierra de Béjar’ and ‘Sierra de Francia’. Finally, an environmental contract linked to the performance of clearing practices and the maintenance of stone walls was prop