The purpose of the diploma thesis was to assess the quality of selected existing rows of silver linden (Tilia tomentosa) and Turkish hazel (Corylus colurna) along the Štajerska cesta road and of American maple (Acer negundo) along the Božičeva cesta road. At selected locations, we chose ten random trees on the left and right sides of the avenue and performed measurements of height, width, trunk circumference at 50 cm from the ground, and the canopy clearance height. Measurements and assessments were performed in the deciduous state in May 2020 and in the non-deciduous state in November 2020. Samples of soil in the tree-lined avenues were also taken. We have described the conditions in which trees grow and what dangers they face during maintenance. It has been observed how important the available space for growth and development is and how important the initial maintenance is until the tree rooting. This was shown in trees with more growing space available, most notably in linden trees, where the right side of the trees that had more space gained on average as much as 4.6 cm more in circumference, and 20 cm more in height. The same goes for the Turkish hazel, where the right side that had more growing space gained on average 1 cm more in circumference and 16 cm in height. The American maple grew on both sides under similar conditions, so the increments are relatively the same. In the coming years we will need to devote much attention to choosing the right types of trees and seedlings in light of the rapid climate change and, consequently, weather extremes.
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