Zagęszczenie i dynamika procesu wydzielania drzew w młodocianych drzewostanach brzozowych na gruntach porolnych

The study describes allometric relationships between stand density and tree dimensions in birch stands on post−agricultural lands. The research material consisted of measurements carried out on 120 sample plots located in birch stands on post−agricultural lands of Central Poland. The investigated relationship was analyzed using ordinary least squares (OLS), dynamical formulation of allometric function (DFA), sto− chastic frontier production function (SFF) as well as quantile regression (QR) methods. Similar effects of modeling maximum density were obtained as a result of applying FFP and QR methods with 0.9 quan− tile. SFF was found to be the most adequate method for modeling maximum density.