Silvicultural condition of tree stands after thinning on drained peatlands

Abstract

The area of stands studied by line plot survey was 594 ha. On the basis of the length of the inventory line the estimated proportion of harvesting strips was 14% and that of ditch openings 6% of the area. The calculated strip road spacing was 29 m. The option of the minimum diameter made it difficult to use the number of stems as criterion for thinning intensity. Thinning intensity evaluated according to the basal area had been stronger than recommended with low values of dominant height and milder with high values. The estimated removal according to stumps was 38 m/ha on the average between the strips. The real removal has, however, been larger than that, as the strip road openings are made in connection with the first thinning.3