The effect of thinning intensity on impregnability (retention) and density of narrow leaved ash wood

The aim of this study was to investigate the effects of different intensities thinning in the ash (Fraxinus angustifolia Vahl) plantation on the retention amount of impregnation material and density variation according to section height and stem direction. For this purpose, samplings were made from the last seven years thinning section, seven section height and two different stem direction (north and south). According to results, a negative correlation was detected between wood density and retention amount of treatment solution. In terms of density and retention amount, there were differences between natural and intensity thinning samples and it was seen that the density was decreased while retention amount was increased in intensity thinning samples. In addition, wood density was increased up to 25% while retention amount was decreased up to 30% as it progressed from bottom of wood to top. When the effect of stem direction was considered, it was found that south section of wood was more dense than north side and retention values has lower