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
Forfattere
Anne-Marte TronsmoSammendrag
Frost tolerance of mycelia and sclerotia were determined in Russin varities from Moscow and Novosibirsk (South Siberia) of Typhula ishikariensis. When mycelia and sclerotia of isolates from Moscow and Novosibirsk were rapidly frozen to -40°C in a program freezer, mycelia of isolates of Moskow were destroyed and the regrowth from scletoria was delayed, whereas the mycelial regroswth of isolates from Novosibirsk were not affected and sclerotia of these isolates survived the freezing stress. These results suggested that isolates of Novosibisrsk are more resistant to rapid freezing stress the those from Moscow. Isolates from Novosibirsk are well adapted to climatic condition in South Siberia
Forfattere
Steen Koekebakker Gudbrand LienSammendrag
Empirical evidence suggests that agricultural futures price movements have fat-tailed distributions and exhibit sudden and un xpected price jumps. There is also evidence that the volatility of futures prices contains a term structure depending on both calendar-time and time to maturity. This paper extends Bates (1991) jump-diffusion option pricing model by including both seas nal and maturity effects in volatility. An in-sample fit to market option prices on wheat futures show that our model outperforms previous models considered in the literature. A numerical example illustrates the economic significance of our results for option valuation.
Forfattere
Steen Koekebakker Gudbrand LienSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Reiserapport frå internasjonalt kirsebærsymposium i USA.
Sammendrag
Farmers in northern Norway have experienced frequent winter damages of grassland, especially on flat areas and peat soils. The use of open ditches and surface grading has become the common method to drain such fields and for reclaiming new land with such characteristics. We designate this as surface grading in this paper. An investment analysis is carried out to explore the profitability of this method. This analysis indicates that the method is profitable from the farmers’ point of view. However, the conclusions are sensitive to changes in crop yields and the value of the yields. The cost of a winter damage and thus an unplanned reseeding is high for young leys, but is small for leys approaching the optimal replacement age.
Forfattere
A Hegrenes G Lien T Haraldsen Tore SveistrupSammendrag
Ecconomical analysis of cost - benefit of surface grading of peat soils in Northern Norway, due to the influence on overwintering and yields of crops.
Forfattere
Christian UhligSammendrag
Det er ikke registrert sammendrag
Forfattere
A-C. Bakman M. Bengtsson Gunnhild Jåstad Sverre Kobro P. WitzgallSammendrag
Coupled gas chromatography-electroantennography was used to analyse the antennal response of female moths to volatiles collected from apple and rowan.