Assessment of the differences between juvenile and mature woods of Populus alba trees in the longitudinal and radial axes of the stem

The aim of this study was to evaluate the differences between juvenile and mature woods Populus alba trees in axial radial directions stem. For purpose, three stands P. were randomly chosen cut from at their diameter breast height. Three disks with a thickness 5 cm taken different height levels along tree stems. specimens sequentially position according ISO standards method. results indicated that there are significant physical biometric features longitudinal axes As base top stem increased, oven-dry density, basic fiber factors decreased. Moreover, as distance pith bark increased. microscopic represented is semi-ring-porous hardwood distinct growth ring boundaries, simple perforation, homogenous rays, alternative inter-vessel pits.