Techniques used in timber harvesting, i.e. for felling, processing and extracting trees – in twelve classes. If timber has been harvested since the last Inventory, the information is based on the procedures actually used. If, on the other hand, no harvesting has taken place, it is based on the procedures which, according to the district forester's assessment, would have been used in the case of an intervention at the time of the current Inventory. Abbreviations: LO: logging, EX: extraction, PS: pre-skidding, FE: felling, PRO: processing, CH: chopping, AS: assortment, FT: full tree. Reference: Forest Service Survey (MID 352: Art der Holzhauerei, MID: 3001: Rückemittel)

Code	Text	NFI3	NFI4	NFI4b
-1	n/a	x	x	x
1	LO: motor-manual, EX: skidder (AS)	x	x	x
2	LO: motor-manual, PS: skidder, EX: Forwarder (AS)	x	x	x
3	FE: motor-manual, EX: skidder (FT), PRO: processor	x	x	x
4	FE+PRO: wheeled/tracked harvester, EX: Forwarder (AS)	x	x	x
5	LO: motor-manual, EX: tower yarder (AS)	x	x	x
6	LO: motor-manual, EX: long-distance yarder (AS)	x	x	x
7	FE: motor-manual, EX: tower yarder (FT), PRO: processor	x	x	x
8	FE: motor-manual, EX: long-distance yarder (FT), PRO: processor	x	x	x
9	FE+PRO: motor-manual, EX: helicopter (AS)	x	x	x
10	FE: motor-manual, EX: helicopter (FT), PRO: processor	x	x	x
11	FE: motor-manual, PS: skidder, CH: chipper on forwarder	x	x	x
12	other methods	x	x	x