Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
2006
Authors
Toril Drabløs EldhusetAbstract
No abstract has been registered
Abstract
Dissolved aluminium was fractionated in the field and the laboratory using a cation exchange method. Although absolute differences between results obtained from field and laboratory fractionations were generally small, relative differences, expressed as the ratio between labile aluminium determined after laboratory fractionation (Alll) and that obtained after field fractionation (Allf), could be large. The differences found were not statistically significant, although this may simply reflect the spread in the results. Alll/Allf had no apparent relationship with the temperature difference between the field and the lab. Although some significant correlations were found between Alll/Allf and H+, no significant correlations were found with the equivalent relative difference in {H+} between the lab and the field. Neither was any significant correlation found with dissolved organic carbon.
Abstract
No abstract has been registered
Authors
Gerhard Weiss Suzanne Martin Anne Matilainen Birger Vennesland Carmen Nastase Erlend Nybakk Laura BouriaudAbstract
The article investigates innovation processes in the field of recreational services of forests. It takes a close look on innovation cases from five European countries with different institutional backgrounds in terms of forest ownership and access rights to forest land. The analysis first of all shows that forest related recreation services are developed in different institutional conditions and on public as well as private land. Financing is provided from public and private sources. Ideas may come from within and outside the forestry sector, however, impulses from outside seems to be of primary importance. In sum it can be said that both public and private spheres have important roles in providing natural, financial and human resources and usually a network of public and private actors are involved in innovation processes. Of particular importance are cross-sectoral interactions between forestry and tourism. A greater institutional support is needed for the development of forest related recreation services as the field is at the beginning of its development. Support should focus on providing ideas and financial resources for product development and on facilitating cross-sectoral interaction between forestry and tourism actors. A particular need is seen to develop models for durable interaction between land-owners and tourism operators on a regional scale.
Authors
Petter NilsenAbstract
No abstract has been registered
Abstract
No abstract has been registered
Authors
Aldo Marchetto Rosario Mosello Gabriele A. Tartari John Derome Kirsti Derome Pia Sorsa Nils König Nicholas Clarke Erwin Ulrich Anna KowalskaAbstract
Working Ring Test (WRT) was organised in the framework of the EU Regulation (EC) No 2152/2003 (`Forest Focus`) and of the UN/ECE Program `ICP Forests` in order to evaluate the overall performance of the laboratories monitoring atmospheric deposition and soil solution in European Forests, and to verify the improvement in the analytical quality as the results of the QA/QC work carried out in the laboratories which participated to a previous WRT. Seven natural samples of atmospheric deposition and soil solutions and 5 synthetic solutions were distributed to 52 laboratories, which analysed them using their routine method for the following variables: pH, conductivity, calcium, magnesium, sodium, potassium, ammonium, sulphate, nitrate, chloride, total alkalinity, phosphate, total dissolved nitrogen, dissolved organic carbon, aluminium, copper, iron, manganese, zinc, total phosphorus, total sulphur and silica. For each variable, a Data Quality Objective was defined, based on the results of the previous WRT, the comparison with the DQOs of other international networks, and the importance of the variable in deposition and soil solution monitoring. It resulted that 38% of the results do not meet the DQO, showing for which variables and in which laboratories improvement in analytical performance is needed. The results of the exercise clearly show that the use of data check procedures, as those described in the ICP Forests manual for sampling and analysis of atmospheric deposition, would make it possible to detect the presence of outliers or results not accurate, and would greatly improve the overall performance of the laboratories. Some analytical methods were found not suitable to the samples used in this WRT, nor to atmospheric deposition samples in European forests, and they include outdated methods, such as turbidimetry or nephelometry for the determination of sulphate, silver nitrate titration and ion selective electrode for chloride, Kjeldahl digestion for the determination of ammonium and organic nitrogen, and colorimetric titrations for alkalinity. A detailed discussion of the analyses of total dissolved nitrogen, dissolved organic carbon and total alkalinity is also provided, as they were the variables for which more analytical difficulty arose. Finally, a comparison between the results of this WRT and those of the previous exercise showed that the analytical performance of the laboratories participating in both WRTs improved as a consequence of the adoption of QA/QC procedures.
Abstract
No abstract has been registered
Authors
Peder GjerdrumAbstract
Foredraget tar opp problemstillinger knyttet til skurteknologi, til sammenhengen mellom skur- kapasitet, -nøyaktighet og -utbytte.
Authors
Toril Drabløs EldhusetAbstract
No abstract has been registered