Main tree species with the largest basal area. For the calculation, the standing living trees and shrubs ≥12 cm in diameter at breast height (dbh) were taken into account. Reference: Field Survey (MID 1018: Baumzustand, MID 50: Baumart, MID 60: Brusthöhendurchmesser, MID 62: Umfang)

Code	Text	NFI1	NFI2	NFI3	NFI4	NFI4b	NFI5
-1	n/a	x	x	x	x	x	x
1	spruce	x	x	x	x	x	x
2	fir	x	x	x	x	x	x
3	pine	x	x	x	x	x	x
4	larch	x	x	x	x	x	x
5	Arolla pine	x	x	x	x	x	x
6	other conifers	x	x	x	x	x	x
7	beech	x	x	x	x	x	x
8	maple	x	x	x	x	x	x
9	ash	x	x	x	x	x	x
10	oak	x	x	x	x	x	x
11	sweet chestnut	x	x	x	x	x	x
12	other broadleaves	x	x	x	x	x	x