Summary:

The aim of the study was to evaluate the growth dynamic of Scots pine on the post arable ground under mulch in the third year of cultivation. Planting were carried out on the basis of post arable ground located in the Agro and Hydrometeorology Observatory of the University of Life Sciences in Wrocław. Scots pine plants in the third year of cultivation increased in height from 68.8 cm to 102.5 cm, ie. by 33.7 cm about 49%. The growth rate of pine was the highest in the first part of the growing season (until June 10), when the plant height increased by 30 cm, accounting for about 90% of the total, the annual increment in height. The second biometric parameters studied - the diameter of the trunk - increased in the third year of growing pine from 28.0 mm to 39.9 mm (about 11. 9 mm, ie. about 42%). The growth rate as a trunk diameter was different from that recorded in the case of plant height, because in the first part of the growing pine, wherein the largest increase its height, stem diameter increased by only 29% of the annual growth (ie. about 3.4 mm).