Statistická ročenka Olomouckého kraje 2003 - Český statistický úřad

FORESTRYForestry comprises all incorporated enterprises, which employ 20 employees or more and haveforestry as their principal activity (CZ-NACE), and businesses managing forest land 200 ha or more inarea.Afforestation/reforestation refers to the area artificially afforested/reforested by planting and sowing(i.e. natural regeneration is excluded).Timber removal comprises (a) a felled tree volume of large and small timber measured in m 3 u. b.,which was accepted as final assortment or whole-stem logs and (b) so-called self-production felling.The volume is counted irrespective of what kind of thinning or felling it is derived from and includessalvage felling.Total cleaning includes total area under cleaning or young-growth stand clean cutting. Usually, thosemeasures are the first silvicultural measures applied to forest stands. Streamside stand cleaning isincluded, too.Thinning refers to intentional silvicultural measures in premature stands, usually older than thoseclassified to the first age groups, which are carried out in order to tend and improve the overall state ofstands. These measures include, in particular, stand structure modifications, morphological tending ofstands, and stand stabilization, and are to increase the increment without permanent decrease instand density.Statistická ročenka Olomouckého kraje 2003 137