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.
2000
Authors
Ola FlatenAbstract
No abstract has been registered
Authors
Gudbrand Lien Brian HardakerAbstract
No abstract has been registered
Authors
Gudbrand LienAbstract
No abstract has been registered
Authors
Gudbrand LienAbstract
No abstract has been registered
Abstract
Agriculture in Latvia has been going through major reforms since 1991. State farm ownership exists only in a negligible quantity only for research and training purposes and most of the land has been returned to its previous owners, or their descendants, from the times before collectivization. During the Soviet period a number of collective farms were established. Most of these still exist, but the legal form has been changed and they operate on private owned land. Also new ones have been formed. As a result of the agricultural reforms, the accounting, tax and statistical systems that had been established in the old structure were no longer applicable. An urgent need thus arose for the development of new systems for the large number of new family farms. NILF became involved in this work on initiative of the Agricultural University of Norway (NLH), which at that point was cooperating with the Latvian Agricultural University, and was already planning several projects in Latvia in 1993. In cooperation with the Latvian State Institute of Agrarian Economics (LVAEI), NILF was to assist in the development of systems for collecting and making use of financial data for individual farm management and the development of Latvian agricultural policy. The project received financial support from the Ministry of Foreign Affairs' Program for Cooperation with Central and Eastern Europe, and got under way in the summer of 1996. A project unit was established within LVAEI, which was responsible for all work regarding farm statistics. This included the establishment of farm statistics, adaptation to the European Union's Farm Accountancy Data Network (FADN), as well as systems for farm planning. The adaptation to FADN received some support and training assistance from a Danish project. NILF's project constituted the major part of the LVAEI project unit, both with regard to work load and funding. From the Norwegian point of view, the cooperation with the Latvian project unit functioned extremely well, and the unit has continued following the completion of the project. [...]
Authors
Simen GjølsjøAbstract
No abstract has been registered
Authors
Peder GjerdrumAbstract
No abstract has been registered
Authors
V.R. Nsolomo Halvor Solheim Kåre Olav VennAbstract
No abstract has been registered
Abstract
Aluminium (Al) has been considered to be a central element for risk evaluation of forest damage due to acidification. It has been hypothesised that Al reduces root growth, nutrient uptake and forest vitality. However, forest monitoring studies fail to show correlations between soil acidification and forest health. In general, no direct relation between Al concentration and forest health has been established. Here, Al concentrations in soil solution were manipulated by weekly additions of dilute AlCl3 to levels that are believed to be unfavorable for plant growth. Four treatments (in triplicate) including a reference and three Al addition levels were established. Effects of enhanced Al concentrations on fine root growth, nutrient uptake and crown condition in a mature Norway spruce forest in Norway were tested (1996-1999). After three years of manipulation, crown condition, tree growth and fine root growth were not affected by potentially toxic Al concentrations. However, the Mg content in current year\"s needles decreased at the highest Al addition treatment. The Mg/Al ratio of fine roots of the same treatment had declined too, which suggests that Al blocked Mg uptake at the root surface. The manipulation will be continued for two more years.
Authors
M.J. Latkowska Harald Kvaalen M. AppelgrenAbstract
The influence of light quality on the proliferation of embryogenic tissue of three genotypes of Norway spruce (Picea abies [L.] Karst), with different capacities for mature somatic embryo production, was studied.The proliferating tissues were subjected to light from commercially available light sources: Philips TLD Warm White 36W/29, Philips TLD Blue 18W/18, Philips TLD Red 36W/15, Osram L Fluora 36W/77 and Sylvania Far Red 7080, for 18 h a day with the photon flux (PAR) at 30 mol m-2 s-1.The effect of light quality on the growth of embryogenic tissue was strongly genotype dependent. In genotype 164-4 tissue proliferation was strongly inhibited by blue and red light. Genotype 86:52 reacted in a similar way, but not as strongly as 164-4, whereas the tissue of genotype 186-3 was almost insensitive to light quality and grew fast in all light conditions.