The Swedish Forest Soil Inventory

Updated 2017-10-16


This project was previously a part of the project: National Survey of Forest Soils and Vegetation.

The Swedish Forest Soil Inventory (SFSI) is part of the national environmental monitoring programme Forests and collects information about soil conditions and chemistry from around 23 500 permanent plots throughout Sweden. One tenth of these sampling plots are re-visited each year. The inventory is commissioned by the Swedish Environmental Protection Agency and is carried out by the Department of Soil and Environment at the Swedish University of Agricultural Sciences (SLU).

The inventory gathers basic information on soils and vegetation on predominantly forest land, but also semi-natural grassland and wetland below the alpine forest limit. It includes most aspects concerning soils, for example: soil types, soil chemistry including organic matter, water conditions and content of stones and boulders. Acidification, nitrogen deposition and the contribution by soils to climate change are some of the current issues dealt with. There is a close collaboration between the SFSI and the National Forest Inventory (NFI), and the inventoried plots are a subset of the NFI plots. .

This is a National Implementation Plan (NIP) project
Comments and additional information:

Monitoring proceeds in ten-year intervals. The first inventory started in 1993 and lasted until 2002, the second 2003-2012. The current inventory began in 2013 and will continue until 2022.

Inventoried variables on permanent sampling plots include field and bottom layer vegetation (occurrence of  268 species and species groups, and in addition coverage of 72 of these), site condition (moisture class, moving soil water, plot exposition, plot surface inclination, site quality index, degree of influence from forestry operations, the cultural influences, boulder frequency), and soil characteristic by asses of type of soil, texture, humus form, degree of humification, thickness of humus layer. The soil sampling is up to 1 m depth on some plots. Soil sampled from different horizons is analyzed for pH, N, C, CEC-, acidity and exchangable Al.

Time frame

Project time span
1993 - 2099
Data collection
1993 - 2022
Data processing
1993 - 2022
Data reporting
1993 - 2022

Contact information

Contact person
Johan Stendahl

Swedish University of Agricultural Sciences (SLU), Department of Soil and Environment, Box 7001, 750 07 Uppsala Sweden

Other project contacts

Ola Inghe, Swedish Environmental Protection Agency S-106 48 Stockholm Sweden, Phone: +46106981571, E-mail:

Tove Lundeberg (AMAP representative) Swedish Environmental Protection Agency, Phone: +46106981611, E-mail:

Parameters and Media

Parameter groups measured/observed/modelled
Acidification parameters
Biological effects
Other metals/elements
Media sampled/studied/modelled
Additional information or further specification of types of data / information collected, species / tissues / organs sampled, etc.

vegetation, plant species, landscape, site condition, micro-elements, macro-elements


Regions studied
Other metals/elements

Data availability

Are data archived or planned to be archived at an AMAP Thematic Data Centre?
If no (or only part of data are reported to a TDC), where and how are (other) data stored?

Results, mainly as mapsm are readily available in an internet-based information system called "Markinfo" ( as well as on SLU's homepage (

References to key publications (or planned publications) and data reports

Publications are available on SU's wesite: ( and (

Publications are also available on Swedish EPA DiVA portal: (

Samples/specimens archived in specimen banks?
Specimen banking information

For information contact project leader:

Methods & Procedures

Procedures and methodology used for, e.g., sampling and sample storage, sample pretreatment, extraction and analysis, including which laboratories are involved, references to methods employed, etc.

For information contact project leader:

Additional Information

Is this a bi- AND multi-lateral project (i.e. a project involving cooperation between different countries)?
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