Browsing NIBIO Brage by Author "Persson, Tomas"
Now showing items 1-12 of 12
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A review of the effects of density and silo type on silage fermentation, nutritive quality and losses during storage
Persson, Tomas; Bakken, Anne Kjersti (NIBIO Rapport, Research report, 2024)Ensiling is a common mode of preservation of animal feed. In this process, the feed undergoes lactic acid fermentation in an anaerobic environment, which decreases pH and inhibits degradation of the feed and its nutritive ... -
Bio-economic evaluation of greenhouse designs for seasonal tomato production in Norway
Naseer, Muhammad; Persson, Tomas; Righini, Isabella; Stanghellini, Cecilia; Maessen, Hendricus; Verheul, Michel J. (Peer reviewed; Journal article, 2021-11-20)Greenhouses are complex systems whose size, shape, construction material, and equipment for climate control, lighting and heating can vary largely. The greenhouse design can, together with the outdoor weather conditions, ... -
Bioeconomic evaluation of extended season and year-round tomato production in Norway using supplemental light
Naseer, Muhammad; Persson, Tomas; Righini, Isabela; Stanghellini, Cecilia; Maessen, Hendricus; Ruoff, Peter; Verheul, Michel (Peer reviewed; Journal article, 2022-02-28)CONTEXT For high latitude countries like Norway, one of the biggest challenges associated with greenhouse production is the limited availability of natural light and heat, particularly in winters. This can be addressed by ... -
Combined effects of climate change and policy uncertainty on the agricultural sector in Norway
Mittenzwei, Klaus; Persson, Tomas; Höglind, Mats; Kværnø, Sigrun (Journal article; Peer reviewed, 2017-05)Farmers are exposed to climate change and uncertainty about how that change will develop. As farm incomes, in Norway and elsewhere, greatly depend on government subsidies, the risk of a policy change constitutes an additional ... -
Combining models to estimate the impacts of future climate scenarios on feed supply, greenhouse gas emissions and economic performance on dairy farms in Norway
Özkan Gülzari, Şeyda; Åby, Bente Aspeholen; Persson, Tomas; Höglind, Mats; Mittenzwei, Klaus (Journal article; Peer reviewed, 2017-08-01)There is a scientific consensus that the future climate change will affect grass and crop dry matter (DM) yields. Such yield changes may entail alterations to farm management practices to fulfill the feed requirements and ... -
Dyrking av grovfor i et endret klima
Persson, Tomas; Höglind, Mats; Dalmannsdottir, Sigridur; Jørgensen, Marit; Rognli, Odd Arne; Østrem, Liv (NIBIO POP;3(24) 2017, Journal article, 2017-11)KORT OM KLIMAFRAMSKRIVNINGER I NORGE. Klimaet i Norge er i endring og klimaframskrivinger fram mot 2100 viser økende middeltemperatur og nedbør stort sett over hele Norge. Temperaturøkningen er forventet størst nord i ... -
Endret klima- effekter og behov for tilpasninger i norsk kornproduksjon
Seehusen, Till; Waalen, Wendy; Hoel, Bernt; Uhlen, Anne Kjersti; Persson, Tomas; Strand, Einar (NIBIO Bok;2(1) 2016, Chapter, 2016) -
A greenhouse climate-yield model focussing on additional light, heat harvesting and its validation
Righini, Isabella; Vanthoor, Bram; Verheul, Michel; Naseer, Muhammad; Maessen, Hendricus; Persson, Tomas; Stanghellini, Cecilia (Peer reviewed; Journal article, 2020-03-31)A greenhouse climate-crop yield model was adapted to include additional climate modification techniques suitable for enabling sustainable greenhouse management at high latitudes. Additions to the model were supplementary ... -
Impacts of organic soil amendments on forage grass production under different soil conditions
Persson, Tomas; Szulc, Wieslaw; Rutkowska, Beata; Höglind, Mats; Hanslin, Hans Martin; Sæbø, Arne (Peer reviewed; Journal article, 2020-12-30)Organic amendments can improve grassland productivity. Timothy and tall fescue were sown on a sandy loam and a coarse sand at Særheim, Norway, in September 2016 and on a loamy sand at Skierniewice, Poland, in April 2017, ... -
Life cycle assessment of tomato production for different production strategies in Norway
Naseer, Muhammad; Persson, Tomas; Hjelkrem, Anne-Grete Roer; Ruoff, Peter; Verheul, Michel (Peer reviewed; Journal article, 2022-08-30)The availability of fresh vegetables grown in greenhouses under controlled conditions throughout the year has given rise to concerns about their impact on the environment. In high latitude countries such as Norway, greenhouse ... -
Phosphorus retention and agronomic efficiency of refined manure-based digestate—A review
Persson, Tomas; Rueda-Ayala, Victor (Peer reviewed; Journal article, 2022-10-11)Digestate, a by-product from anaerobic digestion of organic materials such as animal manure, is considered a suitable plant fertilizer. However, due to its bulkiness and low economic value, it is costly to transport over ... -
Simulation of timothy nutritive value: A comparison of three process-based models
Persson, Tomas; Höglind, Mats; van Oijen, Marcel; Korhonen, Panu; Palosuo, Taru; Jégo, Guillaume; Virkajärvi, Perttu; Bélanger, Gilles; Gustavsson, Anne-Maj (Journal article; Peer reviewed, 2018-11-26)Different forage grass models are used to simulate forage yield and nutritive attributes, but these models are seldom compared, particularly those for timothy (Phleum pratense L.), a widely grown forage grass species in ...