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.
2009
Authors
Mari Mette Tollefsrud Jørn Henrik Sønstebø Christian Brochmann Øistein Johnsen Tore Skrøppa GG VendraminAbstract
No abstract has been registered
Abstract
No abstract has been registered
Authors
Marianne Vileid Uleberg Ievina Sturite Trond Maukon Henriksen Olavi Junttila Marit JørgensenAbstract
No abstract has been registered
Authors
Daniel Kwaku Addo Asante Igor A. Yakovlev Carl Gunnar Fossdal Gerrit Frantz Timmerhaus Jouni Partanen Øystein JohnsenAbstract
No abstract has been registered
Authors
Frode FlemsæterAbstract
The article argues that geographies of home add important perspectives for analysing property enactment on Norwegian smallholdings. Characteristics of smallholdings as homes are described, and it is demonstrated that 'home matters' in terms of how property owners' senses of home affect how properties become enacted. In conformity with recent theories in legal geography, the article demonstrates that these socio-spatial relationships conflict with the dominant ownership model which permeates public policy initiatives. The ownership model assumes a single owner motivated by self-regarding behaviour and maximising economic benefits. The article, however, reveals a deep sense of home and place attachment relating to Norwegian smallholdings, and this influences how smallholdings as properties become enacted, and thus, how legal instruments aiming at affecting people's behaviour are responded to. The article draws upon empirical research conducted among current and former owners of smallholdings in four Norwegian local authority districts.
Authors
Mikael Ohlson Barbro Kristina Dahlberg Tonje Økland Kendrick J. Brown Rune HalvorsenAbstract
Forest fires release significant amounts of carbon dioxide into the atmosphere(1), but also convert a fraction of the burning vegetation to charred black carbon. Black carbon is hard to break down, and formation of this reserve therefore creates a long-term soil carbon sink(2-7). However, although soil black carbon pools are important for global carbon budgets, the spatial variation and dynamics of these pools are poorly understood(6-9). Here we examine the charcoal content of 845 soil samples collected from a broad range of boreal forest landscapes and climates in Scandinavia. We show that there is considerable variation in the distribution and carbon content of soil charcoal between forest landscapes; the landscape-level amount of soil carbon stored in charcoal ranged from 0 to 222 g Cm-2, with an average of 77 g Cm-2. The carbon concentration in the soil charcoal is significantly lower than that found in recently produced fresh charcoal, suggesting that charcoal carbon content decreases with time. Indeed, the median age of a subset of C-14-dated soil charcoal particles was 652 years, implying a rapid turnover compared with the expected median age of approximately 5,000 years if charcoal is persistent. Assuming that our measurements are representative of boreal forests worldwide, we estimate that boreal forest soils store 1 Pg of carbon in the form of charcoal, equivalent to 1% of the total plant carbon stock in boreal forests.
Authors
Frode Eick K Maleta Espen Govasmark Asim K. Duttaroy Gunnar Aksel BjuneAbstract
No abstract has been registered
Authors
Rahel C Brändli Anders Bergsli Upal Ghosh Thomas Hartnik Gijs D. Breedveld Gerard CornelissenAbstract
No abstract has been registered
Authors
Frode FlemsæterAbstract
This paper examines emotional dilemmas occurring when Norwegian smallholdings are converted from permanent to second homes. These are properties that might have been in the family for generations as permanent homes, and which successors often feel obliged to take over and maintain by having them as second homes. Second homes are usually associated with leisure and pleasure, a retreat to recharge the batteries. However, this paper argues that having a smallholding which used to be your permanent home as a second home might involve emotional dilemmas, and it discusses relations between on the one hand, aspects of idyll and comfort and on the other hand, aspects of duty and responsibility. Further, the paper examines how emotional and social property relations influence how smallholdings as second homes become enacted.
Authors
Reidun Pommeresche Anne-Kristin LøesAbstract
This paper presents Norwegian studies of earthworms (density, biomass, burrows density, species, juvenile to adult ratios) in arable soil in Norway conducted during the last 20 years. The effects of crop rotations, fertilization, soil tillage and compaction on earthworms are presented, based on various field experiments. Geophagous (soil eating) species such as Aporrectodea caliginosa and A. rosea dominate the earthworm fauna in Norwegian arable soil. Lumbricus terrestris is also present; in our studies even frequently found in an all-arable crop rotation with annual ploughing. In southern Norway, L. rubellus, and A. longa are commonly found. Earthworm density, recorded in autumn varied between 30 and 350 individuals m-2 in different studies, with the lowest values found in conventional all arable farming systems. One year of ley in the crop rotation increased earthworm burrow density, earthworm density and biomass. Even short-term leys for green manure had a positive effect, likely due to high clover content. Application of animal manure increased earthworm density and biomass. Because geophagous species prefer the upper soil layer, shallow ploughing (15 cm depth) was expected to be detrimental. However, the earthworm density and biomass was not lower with shallow as compared to deep ploughing (25 cm depth). With earthworm densities such as those found in farming systems with ley and animal manure, an estimated amount of 221 tonne of topsoil per hectare passes through the earthworm digestion system within one year. Field-collected geophagous earthworm casts had considerably higher concentrations of plant nutrients than bulk soil (28% higher concentration of Tot-N, 36-53% for PAL, 40%-59% for KAL). Earthworm casts are significant natural sources of plant nutrients, also in soils with high dominance of geophagous earthworm species.