Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
2000
Forfattere
Dag Fjeld Leif Egil Hem Tom Roar EikebrokkSammendrag
This study examines the role of forest operations strategies in sector development for Norway's fjord region. The paper starts with an examination of forest owner attitudes and perceptions in relation to their harvesting behaviour, use of contractor harvesting and road net extension. The influence of forest owner decisions, contractor mechanisation and road net extension standards on operational efficiency is examined in a simple deterministic model of the regional wood chain. Average wood procurement costs are calculated for increasing sector capacity. Direct and indirect harvesting costs are also followed throughout this development.
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Per Otto Flæte Olav Albert Høibø Frode Fjærtoft Tom-Nils NilsenSammendrag
Det er ikke registrert sammendrag
Forfattere
Helge Lundekvam Per-Ivar VåjeSammendrag
Det er ikke registrert sammendrag
Forfattere
Svein Ole BorgenSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Isabella BørjaRedaktører
Richard HorntvedtSammendrag
Det er ikke registrert sammendrag
Forfattere
Isabella BørjaRedaktører
Bjørn ØklandSammendrag
Det er ikke registrert sammendrag
Forfattere
Carl Einar Amundsen Åsgeir Rossebø Almås Bal Ram SinghSammendrag
The main purpose of the risk assessment is to assess the future risk from cadmium in mineral P-fertilisers to human health, soils and waters using model calculations. The risk assessment of Cd in mineral fertilisers has been performed according to procedures suggested by ERM (2000). The procedure consists of three modules: 1) The accumulation module; 2) The exposure module; 3) The risk characterisation module. Two scenarios for Cd in mineral P-fertilisers were used: 2.3 mg Cd kg-1 P2O5-(present level of Cd ) and 60 mg Cd kg-1 P2O5 average EU-level).In the accumulation module the future (in 100 years) concentration of Cd in soils was calculated using a mass balance model. Application of P-fertiliser containing 60 mg Cd kg-1 P2O5 increases the soil concentration of Cd by 16 to nearly 100 percent depending on type of crop and region. In the exposure module, the uptake of Cd from the soil to wheat, potato and carrot is calculated as well as the relative contribution from fertilisers to the human uptake of Cd. The application of P-fertilisers containing 60 mg Cd kg-1 P2O5 in 100 years increase the daily intake of Cd by 7
Forfattere
Eirik Romstad Arild Vatn Per Kristian Rørstad Viil SøylandSammendrag
Multifunctionality is a systems oriented concept. It addresses the fact that in addition to the provision of private goods like food and fiber, agriculture also provides a set of public goods. The most central public good elements are: - Landscape values: biodiversity, cultural heritage, amenity value of the landscape, recreation/access, scientific/educational value. - Food related aspects: food security, food safety and food quality. - Rural activity: rural settlement and economic activity. Moreover, agricultural production results in negative external effects, like nutrient runoff, erosion, and pollution from pesticide and herbicide use. These aspects also need to be considered when designing policies and determining the extent and type of agriculture. The linkages between agricultural production and public good attributes imply that the costs of providing the public goods may vary. Polices directed at changing the amount of some public goods provided by agriculture will therefore influence domestic commodity production, and thereby als