Blar i Brage NMBU på forfatter "Holten, Roger"
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A Dual-Permeability Approach for Modeling Soil Water Flow and Heat Transport during Freezing and Thawing
Larsbo, Mats; Holten, Roger; Stenrød, Marianne; Eklo, Ole Martin; Jarvis, Nicholas (Peer reviewed; Journal article, 2019)Preferential flow may become significant in partially frozen soils because infiltration can occur through large, initially air-filled pores surrounded by a soil matrix with limited infiltration capacity. The objectives of ... -
The effect of freezing and thawing on water flow and pesticide leaching in partially frozen soil: Soil column experiments and model development
Holten, Roger (;2019:20, Doctoral thesis, 2019)Increased pesticide concentrations have often been detected in soil leachate, drain discharge and surface runoff during freeze/thaw periods in late winter and early spring, both in Norway and Sweden. Limited knowledge and ... -
Leaching of Five Pesticides of Contrasting Mobility through Frozen and Unfrozen Soil
Holten, Roger; Larsbo, Mats; Jarvis, Nicholas; Stenrød, Marianne; Almvik, Marit; Eklo, Ole Martin (Peer reviewed; Journal article, 2019)Field and laboratory studies show increased leaching of pesticides through macropores in frozen soil. Fast macropore flow has been shown to reduce the influence of pesticide properties on leaching, but data on these processes ... -
Multi-year transport studies of sulfonylurea herbicides from a barley field in Norway, 2007-2010 – including development of LC-MS/MS methods for quantitative analysis of sulfonylurea herbicides and degradation products
Almvik, Marit; Riise, Gunnhild; Bolli, Randi; Børresen, Trond; Christiansen, Agnethe; Odenmarck, Sven R.; Holten, Roger (Bioforsk Rapport, Research report, 2011)The report presents the results from multi-year field studies of transport of the sulfonylurea herbicides tribenuron-methyl and amidosulfuron in a barley field in Norway. A method for sample preparation of water samples ... -
National Scenarios – Norway. Introduction of national scenarios for approval of new pesticides in Norway
Bolli, Randi; Haraldsen, Terje; Haugen, Lars Egil; Holten, Roger; Eklo, Ole Martin (Bioforsk Rapport, Research report, 2011)This is a final report for the project Norwegian Scenarios from the periods 1999-2002 and 2005- 2008, mainly focusing on the simulations done with the models MACRO and PRZM. The aim of this project was to improve the risk ... -
Norwegian Scenarios II. Final report from the period 2007/2008
Eklo, Ole Martin; Almvik, Marit; Bolli, Randi; Børresen, Trond; Haraldsen, Terje; Haugen, Lars Egil; Holten, Roger; Riise, Gunnhild (Bioforsk Rapport, Research report, 2009)This is a final report for the project Norwegian Scenarios II, part two, that has been performed in collaboration between Bioforsk Plant Health and Plant Protection, The Norwegian University of Life Sciences and the Norwegian ... -
Pesticide regulatory risk assessment, monitoring, and fate studies in the northern zone: recommendations from a Nordic-Baltic workshop
Stenrød, Marianne; Almvik, Marit; Eklo, Ole Martin; Gimsing, Anne Louise; Holten, Roger; Künnis-Beres, Kai; Larsbo, Mats; Putelis, Linas; Siimes, Katri; Turku, Inara; Uusi-Kämppä, Jaana (Journal article; Peer reviewed, 2016) -
Probabilistic risk assessment of pesticides under future agricultural and climate scenarios using a bayesian network
Mentzel, Sophie; Grung, Merete; Holten, Roger; Tollefsen, Knut-Erik; Stenrød, Marianne; Moe, S. Jannicke (Peer reviewed; Journal article, 2022)The use of Bayesian networks (BN) for environmental risk assessment has increased in recent years as they offer a more transparent way to characterize risk and evaluate uncertainty than the traditional risk assessment ... -
The effect of freezing and thawing on water flow and MCPA leaching in partially frozen soil
Holten, Roger; Bøe, Frederik; Almvik, Marit; Katuwal, Sheela; Stenrød, Marianne; Larsbo, Mats; Jarvis, Nicholas; Eklo, Ole Martin (Journal article; Peer reviewed, 2018)Limited knowledge and experimental data exist on pesticide leaching through partially frozen soil. The objective of this study was to better understand the complex processes of freezing and thawing and the effects these ...