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ŠUMARSKI LIST 5-6/2018 str. 47     <-- 47 -->        PDF

words, while the control ramets grew 106 cm (centimeters) from 2012 to 2013, mean heights increased by 50 cm when three nodes were pruned, and by 59 cm when five nodes were pruned during the same period. The difference between the mean heights of control ramets and ramets pruned by three and fivenodes were 60 and 127 cm in 2012, and 117 and 176 cm, respectively in 2013.
At the middle-aged seed orchard where trees were pruned by one node, mean heights were 7.33 m and 8.17 m, diameters at breast height were 13.7 cm and 13.8 cm, and volume indices were 3.6 dm3 and 4.6 dm3 for pruning of one node and control ramets respectively (Figure 3).
The control ramets reached greater heights than trees pruned by one node by years; similarly, the diameters at breast height were also higher in control ramets in 2012 and 2013, whereas the diameters at breast height were lower in the control ramets than the pruned ramets in the last two years (Figure 4). Furthermore, ramets pruned by one node reached a higher volume index than the control ramets for the entire four years. In 2012, pruning of one node lead to