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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.

2001

Sammendrag

Magnesiummangel gir store skadar på ulike bartre-artar brukt til klyppegrønt og juletre. I nokre felt med lawsonsypress (Chamaecyparis lawsoniana) har skadane vore så omfattande at baret ikkje er salsvare. Også i nordmannsedelgran (Abies nordmanniana) er det meldt om skadar. Artikkelen omtalar symptom, skadar, opptak av magnesium i plantene og tiltak for å hindra skadane

Sammendrag

Previous research has documented that nitrogen fertilization can lead to a significant tree growth increase in large parts of Scandinavia. Nutrient management of Nordic forests is currently under debate, mainly because environmental values are believed to be unnecessarily endangered by these actions. Nutrient management including fertilization, liming, recycling of wood ash or application of alternative nutrient sources can counteract nutrient deficiencies and imbalances, and be used for compensating the nutrients removed through harvesting. For successful implementation of nutritional management measures, several questions should still be studied. These questions mainly concern diagnosis of the need for applications, nutritional sustainability and treatment effects on the forest ecosystem and the surrounding environment.

Sammendrag

Due to the climate the yields of roughage in Northern Norway are considerably lower and more variable than in other parts of the country. The problems relate to severe winter damage on meadows caused by snow, ice carpet and low temperatures. A linear programming model representing an average milk farm of the province has been worked out to study the farm economy of different short-term measures. The model is based on farm accounts in the area and calculates the farm profit in the price level and support regime of the year 2000. The model crop yields are based on field research trials in area. The study shows that the production problems can be overcome by increasing the purchase of feed and by adding extra labour and costs to repair the meadow.

Sammendrag

Due to the climate the yields of roughage in Northern Norway are considerably lower and more variable than in other parts of the country. The problems relate to severe winter damage on meadows caused by snow, ice carpet and low temperatures. A linear programming model representing an average milk farm of the province has been worked out to study the farm economy of different short-term measures. The model is based on farm accounts in the area and calculates the farm profit in the price level and support regime of the year 2000. The model crop yields are based on field research trials in area. The study shows that the production problems can be overcome by increasing the purchase of feed and by adding extra labour and costs to repair the meadow. The profitability of the farm is worsened. However, governmental support for restoring the area as well as extra support to buying additional roughage compensate for the extra cost unless more than 50 percent of the meadow have to be restored. Hiring more land may be profitable while advanced slaughtering of animals is unprofitable unless family labour input can be reduced due to higher opportunity values. Farm profit can be improved if cheap roughage can be purchased or own production of roughage can be increased by improving the farm crop yield level.

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Sammendrag

Undersøkelser omkring erstatningsutmåling ved arealavståelser for veiformål har vist at de varierer mye og er til dels uforutsigbare. Dette kan bl.a. ha sammenheng med hvordan erstatningen beregnes. Dekarkalkyler, som er den mest vanlige metoden, er svært følsomme for de forutsetninger man velger. Formålet med denne rapporten er å beskrive og sammenligne dekarkalkyler og andre metoder for å beregne endringer i årlig avkastning som følger av en liten endring i arealet på gardsbruk. Vi har ikke drøftet spørsmål i samband med omregning fra årlig avkastning til en verdi, for eksempel valg av kapitaliseringsrentefot. Følgende metoder er beskrevet: dekarkalkyler, regresjonsberegninger, spesielt en variant av produktfunksjoner, og vurderinger basert på jordleie. […]

Sammendrag

Ingen annen vekstgruppe i landbruket har så mange markedsmuligheter som den gruppen som kalles urter. Den omfatter planter som brukes til krydder, te, medisin, parfyme, vaskemidler, plantevern m.m. Videreforedling og markedstilpassing er utfordringer som en ikke kan overse dersom norsk urteproduksjon skal bli mer enn en hobby.