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All areas designated as forest according to the NFI forest definition. The forest definition includes shrub forest. The target variable "forest area" is also used when classifying the total area as forest or non-forest.

Sum of the stem cross-sectional areas at a height of 1.3 m (level for measuring diameter at breast height [dbh]) of living trees and shrubs (standing and lying) with a dbh ≥12 cm.

Stemwood volume of all trees and shrubs with a diameter at breast height (dbh) ≥12 cm with bark that were harvested between two inventories.

Volume of stemwood with bark of all trees and shrubs ≥12 cm diameter at breast height (dbh) that were removed from the forest because of damage that occurred between two inventories rather than due to silvicultural planning. The characteristic is derived at the sample plot level from the fellings of the tally trees and the proportion of sanitary/salvage fellings (according to information from the foresters).

Proportion of sample plots that meet the forest definition of NFI, i.e. are covered by "forest without shrub forest" or "shrub forest".

Increase in stemwood volume between two inventories of all surviving trees and shrubs with a diameter at breast height (dbh) ≥12 cm with bark, the stemwood volume of all ingrowing trees and shrubs with bark, and the modelled increase in the stemwood volume of the losses with bark during half the inventory period.

Increase in the stemwood volume between two inventories of all surviving trees and shrubs with a diameter at breast height (dbh) ≥12 cm with bark, the stemwood volume of all ingrowing trees and shrubs with bark, and the modelled increase in the stemwood volume of the losses with bark during half the inventory period minus the volume of mortality. The net increment thus corresponds to the increment (=gross increment) minus the volume of mortality.

Number of stems of conifers and broadleaves 10 to 129 cm in height on which browsing on the shoot from the previous year was detected. Since a different method was used for assessing browsing traces in NFI2, the browsing intensity was overestimated in comparison with in the inventories from NFI4 on. Thus, only increases in browsing intensity can be clearly determined in comparisons with NFI2. For a reliable estimate, at least 30 individuals per estimated value (table cell) should have been assessed for browsing. Therefore, the corresponding tables with the target variable "Number of trees assessed for browsing (no extrapolation)" should also be consulted.

Stemwood volume of living trees and shrubs (standing and lying) with a diameter at breast height (dbh) ≥12 cm with bark.