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Inventory

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2004/06–2009/17

Topic

(6)
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Increase in stemwood volume between two inventories of all surviving trees and shrubs with a diameter at breast height (dbh) ≥12 cm with bark, the stemwood volume of all ingrowing trees and shrubs with bark, and the modelled increase in the stemwood volume of the losses with bark during half the inventory period.
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Classification

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Production capacity of the site in kilograms per hectare and year based on the total mean increment (TMI) according to Keller (1978) - in four classes. Low: TMI ≤1500 kg/(ha/year), moderate: TMI 1501-3000 kg/(ha/year), good: TMI 3001-4500 kg/(ha/year), very good: TMI >4500 kg/(ha/year).
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region

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Demarcation of Switzerland used in NFI for protective forest analyses. The six protective forest regions were derived from the economic regions by combining individual regions according to natural and statistical criteria.
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evaluation area

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Forest that was less than two-thirds covered with shrubs in both NFI3 (2004-2006) and NFI4 (2009-2017) and could be reached on foot.
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grid

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NFI's sampling grid with a mesh size of 1.4 km. The 1.4-km grid is the grid size covering all the previous terrestrial Inventories, which is why it is also called the base grid.
search result: 6 entries on 1 page
LFI3–LFI4 2004/06–2009/17
protective forest region
increment (gross increment)
site quality
accessible forest without shrub forest NFI3/NFI4
1.4-km grid
m³/ha/year
1000 m³/year
LFI3–LFI4 2004/06–2009/17
protective forest region
increment (gross increment)
site quality·conifers and broadleaves
accessible forest without shrub forest NFI3/NFI4
1.4-km grid
m³/ha/year
1000 m³/year
LFI3–LFI4 2004/06–2009/17
protective forest region
increment (gross increment)
site quality·main tree species
accessible forest without shrub forest NFI3/NFI4
1.4-km grid
m³/ha/year
1000 m³/year
search result: 6 entries on 1 page

Citation

Abegg, M.; Ahles, P.; Allgaier Leuch, B.; Cioldi, F.; Didion, M.; Düggelin, C.; Fischer, C.; Herold, A.; Meile, R.; Rohner, B.; Rösler, E.; Speich, S.; Temperli, C.; Traub, B.,
2023: Swiss national forest inventory NFI. Result tables and maps of the NFI surveys 1983–2022 (NFI1, NFI2, NFI3, NFI4, NFI5.1–5) on the internet. [Published online 30.05.2023] Available from the World Wide Web <http://www.lfi.ch/resultate/> . Birmensdorf, Swiss Federal Research Institute WSL
https://doi.org/10.21258/1769925