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ŠUMARSKI LIST 5-6/2019 str. 42     <-- 42 -->        PDF

thinning are statistically similar (Table 2). In Yeºiltepe experiment, a significant difference was found between thinnings in terms of average RVI (%) in 2012 (p<0.05). RVI (%) was the highest in strong thinnings. Control, light and moderate thinnings are statistically similar (Table 2). In both experimental plots, the highest RVI (%) occurred in the plots where strong thinning was applied (Table 2, Figure 4).
The annual height increments in the plantation areas and the trees in the upper layer were evaluated statistically (Table 2). In Vakfıkebir experiment, according to 2-year height increments, the lowest height increment was determined in the control plot while the highest increment was determined in light thinning. Light, moderate and strong thinnings were found statistically similar. In Maçka-Yeºiltepe experiment, the lowest annual height increment is in moderate thinning and the highest increment is in strong thinning. The thinnings are statistically similar.
DISCUSSION
RASPRAVA
Oriental beech plantation areas gave an early response to thinning, and the highest diameter increments occurred in strong thinning in both plantation areas. However, the diameter increments in Maçka-Yeºiltepe plantation were found higher (Table 2). Similar to the findings of this study, it was indicated that diameter increments increased along