Preselection of the inventory

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.

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

Sum of the stem cross-sectional areas at a height of 1.3 m (level for measuring diameter at breast height [dbh]) of all living and dead trees and shrubs (standing and lying) with a dbh ≥12 cm. The total basal area corresponds to the sum of the basal area and the deadwood basal area.

Dry weight (mass) of living trees and shrubs with a diameter at breast height (dbh) ≥12 cm. The tree parts considered are: the roots, stemwood, branchwood and needles/leaves.

Dry weight (mass) of the aboveground parts of living trees and shrubs with a diameter at breast height (dbh) ≥12 cm. The tree parts included are: stemwood, branchwood and needles/leaves.

Dry weight (mass) of the belowground part (roots) of living trees and shrubs with a diameter at breast height (dbh) ≥12 cm. The dimensions of the roots are determined according to Zell and Wutzler.

Dry weight (mass) of the stemwood with bark of the living trees and shrubs with a diameter at breast height (dbh) ≥12 cm.

Proportion of the forest edge with a certain characteristic (e.g. structural diversity, diversity of woody species or forest edge structure) in the total forest edge. The forest edge is the border or transition area between the vegetation form of forest and other elements of the landscape.

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

Number of forest sample plots (Plots).

Number of stems of dead trees and shrubs (standing and lying) with a diameter at breast height (dbh) ≥12 cm.

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

Number of living conifers and conifers ≥10 cm in height and ≤11.9 cm in diameter at breast height (dbh).

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.

Measure of the density of a stocking calculated from the number of stems per hectare (in NFI trees and shrubs with a diameter at breast height [dbh] ≥12 cm) and the mean diameter. With a callipering threshold of 0 cm, the SDI is largely independent of the site quality, tree species composition and stand age.

Number of stems of all living and dead trees and shrubs (standing and lying) with a diameter at breast height (dbh) ≥12 cm. The total number of stems is the sum of the number of stems and the number of deadwood stems.

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

Stemwood volume of all living and dead trees and shrubs (standing and lying) with a diameter at breast height (dbh) ≥12 cm with bark. The total wood volume is the sum of the growing stock and deadwood volumes.

Volume of stemwood of all dead trees and shrubs (standing and lying) with a diameter at breast height (dbh) ≥12 cm with bark.

Measure for the ecological assessment of forest stands, derived from the number of woody species with a diameter at breast height (dbh) ≥12 cm and the occurrence of woody species of special ecological significance (willows, birches, alders, native poplars, oaks, chestnut, cherry, wild fruit and Sorbus species) in the upper layer.

Number of tree and shrub species with a diameter at breast height (dbh) ≥12 cm within the 200 m² circle on the sample plot.