In the year 2012, six research plots were based near the town Divača in the Karst region. The following tree species were planted on all plots: European nettle tree (Celtis australis L.), sessile oak (Quercus petraea (Matt.) Liebl.), common beech (Fagus sylvatica L.), wild cherry (Prunus avium L.), common walnut (Juglans regia L.), and sycamore (Acer pseudoplatanus L.). To find out which species are the most suitable for conversion, we repeated the measurements after four years. 56% of all seedlings survived. The most successful species was P. avium with the highest survival rate (72%) and the highest average seedling height and stem diameter. C. australis also had high survival rates (72%). F. sylvatica seedlings, which had the lowest survival rate (13%), received the highest quality and vitality assessments. Field conditions had the greatest impact on the measured parameters in F. sylvatica, A. pseudoplatanus, and J. regia, and the least in Q. petraea.
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