The main objective of the present investigation is to explore the knowledge and the best practices of resin extraction technics in rural areas and marginal environment in order to promote the live condition of the population in these different regions by providing secure incomes and good working conditions. This could lead to the best evaluation of the good performance of the three most important pine species in North-western of Tunisia to resin extraction.
Assess inter-tree competition in permanent plots established in un-debarked, even-aged stands located in Portugal by i) comparing with the self-thinning line and ii) assessing
