willows (Salix spp.)

We are sorry, the portraits of the tree species are only available in German, French and Italian.

NFI sample plots with species occurrences between 1983 and *

* An occurrence is only shown with a dot on the map if the selected tree or shrub species were detected in at least two inventories.

key figures

NFI4
state 2009/17
	production region
	Jura		Plateau		Pre-Alps		Alps		Southern Alps		Switzerland
topic (target variable)	mean	±	mean	±	mean	±	mean	±	mean	±	mean	±
number of stems 1000 n	65	30	199	52	218	67	1176	246	598	156	2256	305
number of stems %	0.1	0.0	0.2	0.1	0.2	0.1	0.7	0.1	0.9	0.2	0.5	0.1
growing stock (stemwood) 1000 m³	21	11	31	9	19	13	237	63	137	44	445	79
growing stock (stemwood) %	0.0	0.0	0.0	0.0	0.0	0.0	0.2	0.1	0.4	0.1	0.1	0.0
growing stock (stemwood)/number of stems m³/n	0.33	0.07	0.16	0.02	0.09	0.06	0.20	0.03	0.23	0.03	0.20	0.02

The mean ± absolute standard error of the estimate is given in each case.

evaluation area: accessible forest without shrub forest

grid: 1.4 x 1.4 km grid

NFI3–NFI4
change 2004/06–2009/17
	production region
	Jura		Plateau		Pre-Alps		Alps		Southern Alps		Switzerland
topic (target variable)	mean	±	mean	±	mean	±	mean	±	mean	±	mean	±
increment (gross increment) 1000 m³/yr	1	1	3	1	1	1	13	3	8	3	26	5
fellings and mortality 1000 m³/yr	2	1	1	1	1	1	3	1	6	2	12	3

The mean ± absolute standard error of the estimate is given in each case.

evaluation area: accessible forest without shrub forest NFI3/NFI4

grid: 1.4 x 1.4 km grid