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
The International Symposium: Snowmelt erosion and related problems were held in Oslo, 28- 30 March 2001. The symposium was organised by Centre for Soil and Environmental Research and Department of Soil and Water Science at the Agricultural University of Norway . The Symposium was arranged in cooperation with IGU: International Geograpical Union, ESSC, European Society of Soil Conservation, COST 623: Soil erosion and global change. The symposium was also supported by The Ministry of Agriculture and the Norwegian Research Council. The different sessions of the symposium focused upon; Hydrological processes in frozen and partly frozen soils, Soil erosion measurement, processes and influencing factors, Modelling of infiltration, runoff and soil erosion during winter periods. Abstract from paper and poster presentations can be found in the Abstract Book from the Symposium, Jordforsk Report 41/01. The symposium also included one day with field excursion to sites in south eastern Norway where Centre for Soil and Environmental Research and Department of Soil and Water Science at the Agricultural University of Norway have their soil erosion experiments. This report present the excursion program and abstracts and summaries of presentations given at the excursion .
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Lars Olav Eik Leif Jarle AsheimSammendrag
Sheep and goat farming systems in this part of Europe are based on extensive use of non-fertilised natural pastures and a long barn-feeding period. One million ewes are kept for the production of meat and wool while 60,000 goats are kept mainly for themilk. The local demand for organic meat and milk is increasing gradually and 10 percent of the agricultural area is projected to be managed according to organic principles by 2010. This paper discusses the feasibility of introducing cashmere goats in an organic sheep farming production system, based on economical calculations in a Linear Programming model. Significant movements from sheep to cashmere goats production are entirely as slaughtering of eight months old kids (11 kg) is unprofitable, assuming equal labour input of goats and sheep. Yields of meat and cashmere could be improved by feeding the kids until 20 months (19 kg) so possibly making goats as profitable as sheep. The benefits of high value cashmere production and controlling bush encroachment by goats favour a mixed farming system. If yield-levels of roughage can be maintained at 75% without artificial fertilizers and challenges in housing of small ruminants are solved, a shift away from conventional farming is profitable given the current support for organic farming.
Forfattere
Lars Olav Eik Leif Jarle Asheim Tormod ÅdnøySammendrag
Det er ikke registrert sammendrag
Forfattere
Bjørn ØklandSammendrag
Det er ikke registrert sammendrag
Forfattere
Anders Göransson Toril Drabløs EldhusetSammendrag
Det er ikke registrert sammendrag
Forfattere
Anders Göransson Toril Drabløs EldhusetSammendrag
The results strongly suggest that the growth rate of N. spruce is not correlated with the basecation/Al ratio in the rooting medium, but with the basecation/nitrate ratio
Sammendrag
Genetic associations between initiation of embryogenic tissue (ET) and susceptibility to the phytopathogenic fungi Ceratocystis polonica (Siem.) C. Moreau and Heterobasidion annosum (Fr.) Bref. in Norway spruce have been studied by initiating ET from zygotic embryos of mature seeds collected from 19 clones tested for susceptibility to the pathogens in a clonal field trial.Initiation frequencies varied significantly among clones (families), ranging from 12 to 56%. The family variance component accounted for more than 40% of the total variance in initiation frequency of ET. The estimates of broad-sense heritability of fungus susceptibility of the clones ranged from 0.12 for length of phloem necrosis after low-density inoculation with H. annosum to 0.55 for blue-stained sapwood after mass inoculation with C. polonica.None of the susceptibility measures showed any phenotypic correlation with initiation of embryogenic tissue. Genetic correlations and their standard errors were estimated by bootstrapping. Two measures of fungal susceptibility correlated genetically with initiation of ET; estimated at 0.58 for lesion length after inoculation with C. polonica and 0.29 for H. annosum lesion length. A better measure of susceptibility, blue-stained sapwood following inoculation with C. polonica, was not correlated with initiation of ET.
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Lars SekseSammendrag
The paper gives a short summary of the Fourth International Cherry Symposium held in Oregon and Washington, USA on June 24-29 2001. The main topics that were presented during the symposium are summarised and discussed, and excursions and pre- and post-symposium tours likewise.