Planted in single rows, lines of ash trees in Jezersko represent borders between different land owners. On average, ash tree avenues stretch 400 to 500 metres along meadows; some even more than 700 metres. These borders tell us about land use in Jezersko and are important in many other ways.

In the past branches of ash trees, cut by landowners from both sides of the avenue, were used to feed sheep in winter. They present important corridors for smaller animals and can also be good protection from the wind.