1. The Swedish National Forest Inventory
A nationwide inventory of the Swedish forest

2. The Swedish NFI… an annual systematic cluster sample inventory
comprises all land and lake area in Sweden
includes all ownership categories
has been carried out since 1923
also inventories nature reserves and national parks
is a part of the Official Statistics of Sweden
is carried out by the Department of Forest Resource Management, SLU, Umeå

3. Objectives of the inventory
Supply data for strategic planning of forestry utilisation on a regional level as well as for the whole country
Supply data for monitoring environmental status
Supply data for research and education

4. What is inventoried? Land use Growing stock and growth
Forest age and structure
Condition of forest sites and vegetation
Harvesting and other forestry measures
Browsing damages and other damages
Prerequisites for biodiversity

5. Land use Examples: Forest land Grazing land
Non productive land, such as mires and rock surface
Arable land, roads, urban land and power lines
Nature reserves and national parks

6. Growing stock and growth
Examples:
Volume of different tree species
Number of trees
Recorded growth and growth adjusted to normal weather conditions

7. Forest age and structure
Examples:
Stand age
Tree layers
Mean height
Density
Maturity class
Tree species composition

8. Condition of forest sites and vegetation
Examples:
Vegetation type
Presence of selected plant species
Site index class
Soil moisture
Mineral soil or peat land

9. Harvesting and other forestry measures
Examples:
Final felling
Thinning
Precommercial thinning
Soil scarification
Planting / seed trees

10. Prerequisites for biodiversity
Examples:
Dead wood
Old forest
Older forest with high proportion of deciduous trees
Shrubs
Large trees

11. Survey regions 5 4 3 1 2

12. Tract distribution One year sample (year 2004)
Temporary tracts (530 tracts)
Permanent tracts (852 tracts)

13. Tract size Temporary tracts 1800 1500 1500 800 400 600
(Tract sides in metre)
300

14. Tract size
Permanent tracts
1200
1000
800
300
(Tract sides in metre)

15. Work on sample plot
Calipering

16. Data quality is maintained through… training test programs
field control teams
field inspections

17. Users of the NFI data Government and governmental authorities
Trade associations
Forest companies, Forest Farmers Association
Forest Service Organisation, County Administrations
Research departments
The interested public