Browsing Brage NMBU by Author "Martinsen, Vegard"
Now showing items 1-20 of 26
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Assessing the effectiveness of digestate enriched biochar as an alternative fertilizer
Fallas Yamashita, Vladimir Kazuomi (Master thesis, 2021)Background: Alternatives to conventional inorganic fertilizers are needed if we are to curve CO2 emissions, reduce the stress on natural resources and develop an efficient, yet sustainable agricultural practice. Biochar ... -
Availability of plant nutrients under conventional farming and conservation farming with and without biochar : a field study of maize on acidic, sandy loam in Zambia
Aas, Rikke Ødegård (Master thesis, 2016)Conservation farming (CF) has been promoted as an alternative and sustainable agricultural practice for many small-scale farmers in Sub-Saharan Africa (SSA) as a means to improve acid, degraded soil. Conservation farming ... -
Bioavailability of Macro and Micronutrients Across Global Topsoils: Main Drivers and Global Change Impacts
Ochoa-Hueso, Raúl; Delgado-Baquerizo, Manuel; Risch, Anita C.; Ashton, Louise; Augustine, David; Bélanger, Nicolas; Bridgham, Scott; Britton, Andrea J.; Bruckman, Viktor J.; Camarero, J. Julio; Cornelissen, Gerard; Crawford, John A.; Dijkstra, Feike A.; Diochon, Amanda; Earl, Stevan; Edgerley, James; Epstein, Howard; Felton, Andrew; Fortier, Julien; Gagnon, Daniel; Greer, Ken; Griffiths, Hannah M.; Halde, Caroline; Hanslin, Hans Martin; Harris, Lorna I.; Hartsock, Jeremy A.; Hendrickson, Paul; Hovstad, Knut Anders; Hu, Jia; Jani, Arun D.; Kent, Kelcy; Kerdraon-Byrne, Deirdre; Khalsa, Sat Darshan S.; Lai, Derrick Y. F.; Lambert, France; LaMontagne, Jalene M.; Lavergne, Stéphanie; Lawrence, Beth A.; Littke, Kim; Leeper, Abigail C.; Licht, Mark A.; Liebig, Mark A.; Lynn, Joshua; Maclean, Janet E.; Martinsen, Vegard; McDaniel, Marshall D.; McIntosh, Anne C. S.; Miesel, Jessica R.; Miller, Jim; Mulvaney, Michael J.; Moreno, Gerardo; Newstead, Laura; Pakeman, Robin J.; Pergl, Jan; Pinno, Bradley D.; Piñeiro, Juan; Quigley, Kathleen; Radtke, Troy M.; Reed, Paul; Rolo, Víctor; Rudgers, Jennifer; Rutherford, P. Michael; Sayer, Emma J.; Serrano-Grijalva, Lilia; Strack, Maria; Sukdeo, Nicole; Taylor, Andy F. S.; Truax, Benoit; Tsuji, Leonard J. S.; van Gestel, Natasja; Vaness, Brenda M.; Van Sundert, Kevin; Vítková, Michaela; Weigel, Robert; Wilton, Meaghan J.; Yano, Yuriko; Teen, Ewing; Bremer, Eric (Peer reviewed; Journal article, 2023) -
Biochar dispersion in a tropical soil and its effects on native soil organic carbon
Obia, Alfred; Lyu, Jing; Mulder, Jan; Martinsen, Vegard; Cornelissen, Gerard; Smebye, Andreas; Zimmerman, Andrew R. (Peer reviewed; Journal article, 2024) -
Biochar effect on maize yield and soil characteristics in five conservation farming sites in Zambia
Cornelissen, Gerard; Martinsen, Vegard; Shitumbanuma, Victor; Alling, Vanja Karin Gunilla; Breedveld, Gijs D.; Rutherford, W.; Sparrevik, Lars Magnus; Hale, Sarah; Obia, Alfred; Mulder, Jan (Journal article; Peer reviewed, 2013)Biochar addition to agricultural soils can improve soil fertility, with the added bonus of climate change mitigation through carbon sequestration. Conservation farming (CF) is precision farming, often combining minimum ... -
Biochar improves maize growth by alleviation of nutrient stress in a moderately acidic low-input Nepalese soil
Pandit, Naba Raj; Mulder, Jan; Hale, Sarah; Martinsen, Vegard; Schmidt, Hans Peter; Cornelissen, Gerard (Journal article; Peer reviewed, 2018)We studied the role of biochar in improving soil fertility for maize production. The effects of biochar on the alleviation of three potential physical-chemical soil limitations for maize growth were investigated, i.e. water ... -
Cation exchange capacity of biochar: An urgent method modification
Munera-Echeverri, Jose L; Martinsen, Vegard; Strand, Line Tau; Zivanovic, Valentina; Cornelissen, Gerard; Mulder, Jan (Journal article; Peer reviewed, 2018)Biochar, produced through pyrolysis of organic matter, is negatively charged, thus contributing to electrostatic adsorption of cations. However, due to its porous structure and contents of alkaline ashes, the determination ... -
Continuous and discontinuous variation in ecosystem carbon stocks with elevation across a treeline ecotone
Speed, James David Mervyn; Martinsen, Vegard; Hester, Alison J.; Holand, Øystein; Mulder, Jan; Mysterud, Atle; Austrheim, Gunnar (Journal article; Peer reviewed, 2015) -
Effect of calcareous and siliceous amendments on N2O emissions of a grassland soil
Todorcic Vekic, Teodora; Nadeem, Shahid; Molstad, Lars; Martinsen, Vegard; Hiis, Elisabeth Gautefall; Bakken, Lars; Rütting, Tobias; Klemedtsson, Leif; Dörsch, Peter (Peer reviewed; Journal article, 2023)Liming of acidic agricultural soils has been proposed as a strategy to mitigate nitrous oxide (N2O) emissions, as increased soil pH reduces the N2O/N2 product ratio of denitrification. The capacity of different calcareous ... -
Effect of conservation farming and biochar addition on soil organic carbon quality, nitrogen mineralization, and crop productivity in a light textured Acrisol in the sub-humid tropics
Munera-Echeverri, Jose L; Martinsen, Vegard; Strand, Line Tau; Cornelissen, Gerard; Mulder, Jan (Peer reviewed; Journal article, 2020)Conservation farming (CF), involving basin tillage, residue retention and crop rotation, combined with biochar may help to mitigate negative impacts of conventional agriculture. In this study, the effects of CF on the ... -
Effect of grazing in Norwegian outfields related to the quantity and quality of soil organic carbon and other soil properties
Ellingsen, Tonje Forsethlund (Master thesis, 2022)Utilization of the outfield for grazing have long traditions in Norway. Not only as a pasture, but also mowed to provide food for the winter (Rekdal & Angeloff, 2021). From 1949 to 1999, grazing in Norway changed from ... -
Effects of biochar and crop rotation with pigeon pea on soil phosphorus availability in Mkushi and Kaom, Zambia
Hovden, Ingrid Slettemark (Master thesis, 2022)Low phosphorus (P) availability in sub-Sahara African agriculture strongly effects yield and food production negatively. As fertilizer prices increases, the need for human interventions to increase soil plant available P ... -
The effects of biochar on immobilizing Pb, Zn, Cu and Cd in contaminated soils from the mining sites in Kabwe (Zambia) and Folldal (Norway)
Brandsvoll, Cecilie (Master thesis, 2021)Mining activities and resulting waste products are among the main sources of severe heavy metal pollution in the world. This study aims to examine i) the level of soil contamination, ii) mobility and ii) bioavailability ... -
Effects of conservation farming and biochar on carbon and nitrogen cycling in light textured soils in the sub-humid tropics
Munera-Echeverri, José Luis (PhD thesis;2019:41, Doctoral thesis, 2019) -
Effects of hand-hoe tilled conservation farming on soil quality and carbon stocks under on-farm conditions in Zambia
Martinsen, Vegard; Shitumbanuma, Victor; Mulder, Jan; Ritz, C.; Cornelissen, Gerard (Journal article; Peer reviewed, 2017)Conservation farming (CF) has been promoted in Zambia since the 1980s. Despite long-term practice of CF in Zambia, its effect on soil fertility, including the storage of soil organic matter (SOM), on smallholder farms are ... -
Effects of rotational grazing intensity on the quantity and quality of soil organic carbon in Inner Mongolian grasslands
Kok, Nora Hua Ly (Master thesis, 2021)The aim of this thesis is to assess the effects of rotational grazing at varying grazing intensity on soil organic carbon (SOC) quantity and quality in Inner Mongolia. People of the autonomous region of Inner Mongolia, ... -
Fading positive effect of biochar on crop yield and soil acidity during five growth seasons in an Indonesian Ultisol
Cornelissen, Gerard; Jubaedah, X; Nurida, Neneng; Hale, Sarah; Martinsen, Vegard; Silvani, Ludovica; Mulder, Jan (Peer reviewed; Journal article, 2018)Low fertility limits crop production on acidic soils dominating much of the humid tropics. Biochar may be used as a soil enhancer, but little consensus exists on its effect on crop yield. Here we use a controlled, replicated ... -
Fourfold increase in pumpkin yield in response to low-dosage root zone application of urine-enhanced biochar to a fertile tropical soil
Schmidt, Hans Peter; Pandit, Bishnu Hari; Martinsen, Vegard; Cornelissen, Gerard; Conte, Pellegrino; Kammann, Claudia I. (Journal article; Peer reviewed, 2015)A widely abundant and invasive forest shrub, Eupatorium adenophorum, was pyrolyzed in a cost-efficient flame curtain kiln to produce biochar. The resulting biochar fulfilled all the requirements for premium quality, according ... -
Long-Term Increase in Aboveground Carbon Stocks Following Exclusion of Grazers and Forest Establishment in an Alpine Ecosystem
Speed, James David Mervyn; Martinsen, Vegard; Mysterud, Atle; Mulder, Jan; Holand, Øystein; Austrheim, Gunnar (Journal article; Peer reviewed, 2014) -
Long-term P weathering and recent N deposition control contemporary plant-soil C, N, and P
Davies, JAC; Tipping, Edward; Rowe, EC; Boyle, JF; Graf Pannatier, E; Martinsen, Vegard (Journal article; Peer reviewed, 2016)