Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
2018
Sammendrag
The effectiveness of generating virtual transects on unmanned aerial vehicle-derived orthomosaics was evaluated in estimating the extent of soil disturbance by severity class. Combinations of 4 transect lengths (5–50 m) and five sampling intensities (1–20 transects per ha) were used in assessing traffic intensity and the severity of soil disturbance on six post-harvest, cut-to-length (CTL) clearfell sites. In total, 15% of the 33 ha studied showed some trace of vehicle traffic. Of this, 63% of was categorized as light (no visible surface disturbance). Traffic intensity varied from 787 to 1256 m ha−1, with a weighted mean of 956 m ha−1, approximately twice the geometrical minimum achievable with CTL technology under perfect conditions. An overall weighted mean of 4.7% of the total site area was compromised by severe rutting. A high sampling intensity, increasing with decreasing incidence of soil disturbance, is required if mean estimation error is to be kept below 20%. The paper presents a methodology that can be generally applied in forest management or in similar land-use evaluations.
Sammendrag
No abstract has been registered
Forfattere
A. Pérez-Sierra V. Rafiei C. Olivares H. Rees S. van der Linde N. Keča K. Schwanda Venche Talgø B. B. LandaSammendrag
No abstract has been registered
Forfattere
Klaus Mittenzwei Wolfgang BritzSammendrag
Norway maintains a complex system of activity or type specific coupled paymentswhich account for a large share of farm income. Most of the payment rates arenegatively related to farm size and are higher in remote areas compared to centralregions. We present and use a newly developed recursive-dynamic multi-commoditymodel (Agrispace) with CES production functions depicting regional farm clustersderived from the full farm population. Using this model, we simulate impacts ofcurrent and alternative subsidy policies on production, prices, input use, incomeand farm structural change. Mapping cluster results to each farm along with beha-vioural rules allows estimation of individual profits and farm exits. Our results indi-cate that, in the short run, the current policy regime seems to support the policyobjective of maintaining a variety of farms in all parts of Norway. In the long run,farm structural change is less affected by a policy reform that leaves total supportlevels unchanged.
Forfattere
Holger Lange Sebastian Sippel Britta Aufgebauer Michael Hauhs Christina Bogner Henning MeesenburgSammendrag
No abstract has been registered
Forfattere
Anush Panosyan Martina Paponov Michel J. Verheul Ivan PaponovSammendrag
No abstract has been registered
Forfattere
Arne StensvandSammendrag
No abstract has been registered
Forfattere
Inge Stupak Tat Smith Nicholas Clarke Teodorita Al-Seadi Lina Beniušienė Niclas Scott Bentsen Quentin Cheung Virginia Dale Jinke van Dam Rocio Diaz-Chavez Uwe Fritsche Martyn Futter Jianbang Gan Kaija Hakala Thomas Horschig Martin Junginger Yoko Kitigawa Brian Kittler Keith Kline Charles Lalonde Søren Larsen Dagnija Lazdina Thuy P. T. Mai-Moulin Maha Mansoor Edmund Mupondwa Shyam Nair Nathaniel Newlands Liviu Nichiforel Marjo Palviainen John Stanturf Kay Schaubach Johanny Arilexis Perez Sierra Vita Tilvikiene Brian Titus Daniela Thrän Sergio Ugarte Liisa Ukonmaanaho Iveta Varnagyrite-Kabasinkiene Maria WellischSammendrag
No abstract has been registered
Sammendrag
No abstract has been registered
Sammendrag
We investigated whether diversification and/or structural change would improve Norwegian agriculture. Using a flexible technology approach to account for different technologies, we assessed economies of scope and scale of dairy and cropping farms, including regional differences. We fitted translog cost functions to farm-level panel data for the period 1991–2014. We found both economies of scope and scale on the farms. Dairy farms have an economic incentive to integrate dairying with cropping in all regions of Norway, and vice versa. Thus, policy makers should eschew interventions that inhibit diversification or structural change and that increase the costs of food production.