Aim of the study: The objective of this paper is to investigate the use of Biomass Conversion and Expansion Factors (BCEFs) in maritime pine (Pinus pinaster Ait. ) stands subjected to thinning. Area of the study: The study area refers to different ecosystems of maritime pine stands inNorthern Portugal. https://countryscenesaddleryandpetsuppliers.shop/product-category/western-bits/