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.
1999
Authors
Torstein KvammeAbstract
Det er ikke registrert sammendrag
Authors
Torild WickstrømAbstract
Det er ikke registrert sammendrag
Abstract
Det er ikke registrert sammendrag
Authors
Ingvald RøsbergAbstract
Det er ikke registrert sammendrag
Authors
Kristen FretheimAbstract
Det er ikke registrert sammendrag
Authors
Harald Aalde P. GotaasAbstract
Prosjektet ”Klargjøring av avvirkningsmuligheter i norsk skogbruk” er utført som et samarbeid mellom NIJOS, NORSKOG og skogoppsynet fylkesvis, representert ved seksjon skogbruk hos Fylkesmannens landbruksavdelinger. Prosjektet ble påbegynt i 1996. Denne rapporten tar for seg resultatene for Sogn og Fjordane. I rapporten er det redegjort for de mest sentrale forutsetningene som ligger til grunn for arbeidet. For en mer detaljert beskrivelse av opplegget henvises det til den nasjonale rapporten (NIJOS rapport 10/99).
Authors
Petter NilsenAbstract
Det er ikke registrert sammendrag
Authors
Sveinung Nersten Morten HedegartAbstract
Harvesting christmas trees from regenerations in cutting class II - young growth stands - has been practiced for a long time. It is often the forest owner himself who performs the cutting, transportation of the trees to the market place, and the actual marketing. In some cases the forest owner sells the trees to a wholesale or a market dealer. The new aspect of the production model described in the this report - the Birkenes model - is that the trees in advance are selected and marked by competent persons. Information is then given to the wholesale dealer on the number of trees that has been marked at each site, and the dealer reports on the number of trees he wants to buy. The forest owner cuts the relevant number of trees and transports them to the roadside. The trees are controlled by the dealer when loading. Some trees may be discarded, but usually not many. The scope of the present study is to look into the profitability of cutting christmas trees in cutting class II by: Estimating possible reductions in the expectation value when trees are removed from a regeneration. Record time consumption and costs, and calculate net values connected with harvesting christmas trees by various methods and under various conditions. Look into the profitability of establishing more dense plantations for later removal of surplus plants as christmas trees. The field work consists of two parts, surveying of fields for christmas tree harvesting, and recording of the labour used for cutting and transporting the trees to the roadside. The factors affecting the expectation value are the number of trees left after harvesting, and effects on age and quality. The recordings and calculations show that it is primarily the reduction of the number of trees left in the regeneration that affects the expectation value negatively. The costs of manual labour are assumed to be NOK 2 per minute and the costs of machines NOK 3 per minute. The cost connected to marking and delivery of the christmas trees are set to NOK 7 per tree. A rate of interest of 2.5 percent is applied in the expectation value calculations. The sales price per tree to the dealer is set to NOK 45 per tree. The cost of harvesting as well as net price are estimated per tree. The cost of hauling the trees manually depends strongly on the person doing the job, and on hauling distance. If tractor transport is applied, the hauling distance can be considerably increased. Net price per tree increases with increasing number of trees before harvesting and for lower site classes, and decreases a bit with increasing number of trees harvested. For site class G14, initial number of trees 1,600 per ha, number of trees harvested 400 per ha, and hauling distance 50 m, the net price per tree is NOK 15.10. Under the same conditions, except that the hauling distance is 500 m, the net price is NOK 3.
Authors
Bohumil Kucera Håkon Helgerud Myhra Anne Marie GlosliAbstract
Det er ikke registrert sammendrag
Authors
Tormod Stavrum Jan-Ole Skage Terje PundsnesAbstract
Etter at prosjektet `Utvikling av plantemateriale av fjelledelgran (Abies lasiocarpa) til juletreproduksjon` ble satt i gang høsten 1994, har interessen for dette treslaget økt betydelig blant juletreprodusentene. Planteskolene har merket en stor økning i etterspørselen etter fjelledelgran, og det har blant annet ført til forholdsvis stor import av planter fra Danmark