ABSTRACT Background: The invasive tree species threaten the domestic species of a region. However, they can be evaluated for wood industry when they were cut to decrease the population. This study studied a fast-growing deciduous tree species, tree-of-heaven (Ailanthus altissima), to determine the optimum drying schedules of lumbers from Turkey-grown individuals. Results: Optimum schedule was determined from different suggestions in literature and applied in a 1m3 capacity laboratory type-drying kiln on 39 lumber pieces with dimensions of 65x65x2000 mm. The drying time and quality were evaluated according to standards and different methods (e.g. prong test) from literature. Although the fast-growing species had some risks with having more juvenile wood ratio and lower density, it could be dried 65 to 10% moisture content with in as short as 10 days with moderate-protective drying quality. Conclusion: Relatively shorter drying time with high quality compared to similar species (e.g. ash) might contribute the economic sustainability of sawmills. Because the shorter drying cycles will save more energy for per volume and they may be more profitable with shorter sellable dried lumber cycles. On the other hand, although the species was fast-growing, medium density (574 kg/m3) characteristics might show the potential for being a good alternative for the wood industry.

Wild cherry wood (Cerasus avium (L.) Monench) lumber with a nominal thickness of 5 cm from Duzce region in Turkey was dried through conventional kiln drying using two different programs which are unprotective drying schedules, and protective drying schedules. The aim was to obtain the most desirable kiln schedule for keeping the wood quality at an appropriate level up to final moisture content of 12±2% was reached. Intensity of warping (twist, bow, cup, crook) occurrence, superficial, internal and end checks, residual stresses, drying rate, and moisture gradient in the dried woods were measured, and the results were analyzed. The results showed that there was a more homogeneous moisture profile, fewer occurrences of superficial checks, and absence of internal checks in the protective drying schedules due to low warping values compared to the unprotective drying schedules. Therefore, it seems that protective drying schedules might be recommended as optimum program for wild cherry lumber drying at commercial scale from Duzce region.