Now showing items 1348-1367 of 1416

    • UAV-Based Hyperspectral Imagery for Detection of Root, Butt, and Stem Rot in Norway Spruce 

      Allen, Benjamin James; Dalponte, Michele; Ørka, Hans Ole; Næsset, Erik; Puliti, Stefano; Astrup, Rasmus Andreas; Gobakken, Terje (Peer reviewed; Journal article, 2022-08-08)
      Numerous species of pathogenic wood decay fungi, including members of the genera Heterobasidion and Armillaria, exist in forests in the northern hemisphere. Detection of these fungi through field surveys is often difficult ...
    • Understanding peer support: a qualitative interview study of doctors one year after seeking support 

      Horne, Ingrid Marie Taxt; Veggeland, Frode; Bååthe, Fredrik; Drewes, Christina; Rø, Karin (Peer reviewed; Journal article, 2023-04-01)
      Background Doctors’ health is of importance for the quality and development of health care and to doctors themselves. As doctors are hesitant to seek medical treatment, peer support services, with an alleged lower threshold ...
    • Unit-level and area-level small area estimation under heteroscedasticity using digital aerial photogrammetry data 

      Breidenbach, Johannes; Magnussen, Steen; Rahlf, Johannes; Astrup, Rasmus Andreas (Journal article; Peer reviewed, 2018)
      In many applications, estimates are required for small sub-populations with so few (or no) sample plots that direct estimators that do not utilize auxiliary variables (e.g. remotely sensed data) are not applicable or result ...
    • An update of sweet potato viral disease incidence and spread in Ethiopia 

      Buko, Dereje Haile; Gedebo, A.; Spetz, Carl; Hvoslef-Eide, Anne Kathrine (Peer reviewed; Journal article, 2020-08-31)
      Sweet potato (Ipomoea batatas (L.) Lam.) is an important root crop for poor farmers in developing countries. Since the late 1980s, viral diseases have increasingly become a threat to sweet potato production in Ethiopia. ...
    • Urban Water Retention Measures 

      Zelenakova, Martina; Diaconu, Daniel Constantin; Haarstad, Ketil (Journal article; Peer reviewed, 2017-06-02)
      Many cities and urban areas are located in flood plains because land is fertile and flat which is suitable for agriculture and urban development. Rivers provide water supply for domestic, industrial and irrigation uses; ...
    • Use of Copper-Based Fungicides in Organic Agriculture in Twelve European Countries 

      Tamm, Lucius; Thuerig, Barbara; Apostolov, Stoilko; Blogg, Hugh; Borgo, Esmeralda; Corneo, Paola Elisa; Fittje, Susanne; de Palma, Michelangelo; Donko, Adam; Experton, Catherine; Marin, Évelyne Alcázar; Pérez, Ángela Morell; Pertot, Ilaria; Rasmussen, Anton; Steinshamn, Håvard; Vetemaa, Airi; Willer, Helga; Herforth-Rahmé, Joëlle (Peer reviewed; Journal article, 2022-03-10)
      The reduction of copper-based plant-protection products with the final aim of phasing out has a high priority in European policy, as well as in organic agriculture. Our survey aims at providing an overview of the current ...
    • Use of models in large-area forest surveys: comparing model-assisted, model-based and hybrid estimation 

      Ståhl, Göran; Saarela, Svetlana; Schnell, Sebastian; Holm, Sören; Breidenbach, Johannes; Healey, Sean P.; Patterson, Paul L.; Magnussen, Steen; Næsset, Erik; McRoberts, Ronald E.; Gregoire, Timothy G. (Journal article; Peer reviewed, 2016)
      This paper focuses on the use of models for increasing the precision of estimators in large-area forest surveys. It is motivated by the increasing availability of remotely sensed data, which facilitates the development of ...
    • Use of UAV photogrammetric data for estimation of biophysical properties in forest stands under regeneration 

      Puliti, Stefano; Solberg, Svein; Granhus, Aksel (Peer reviewed; Journal article, 2019)
      The objective of this study was to assess the use of unmanned aerial vehicle (UAV) data for modelling tree density and canopy height in young boreal forests stands. The use of UAV data for such tasks can be beneficial ...
    • Use of UAV photogrammetric data in forest genetic trials: measuring tree height, growth, and phenology in Norway spruce (Picea abies L. Karst.) 

      Solvin, Thomas Mørtvedt; Puliti, Stefano; Steffenrem, Arne (Peer reviewed; Journal article, 2020)
    • Using a Multi-Institutional Ensemble of Watershed Models to Assess Agricultural Conservation Effectiveness in a Future Climate 

      Kujawa, Haley; Kalcic, Margaret; Martin, Jay; Apostel, Anna; Kast, Jeffrey; Murumkar, Asmita; Evenson, Grey; Aloysius, Noel; Becker, Richard; Boles, Chelsie; Confesor, Remegio; Dagnew, Awoke; Guo, Tian; Muenich, Rebecca Logsdon; Redder, Todd; Wang, Yu-Chen; Scavia, Donald (Peer reviewed; Journal article, 2022-06-16)
      This study investigates the combined impacts of climate change and agricultural conservation on the magnitude and uncertainty of nutrient loadings in the Maumee River Watershed, the second-largest watershed of the Laurentian ...
    • Using ecological context to interpret spatiotemporal variation in natural selection 

      Albertsen, Elena; Opedal, Øystein Hjorthol; Bolstad, Geir Hysing; Pérez-Barrales, Rocío; Hansen, Thomas F; Pelabon, Christophe; Armbruster, William Scott (Peer reviewed; Journal article, 2020-11-23)
      Spatiotemporal variation in natural selection is expected, but difficult to estimate. Pollinator‐mediated selection on floral traits provides a good system for understanding and linking variation in selection to differences ...
    • Using laser micro-dissection and qRT-PCR to analyze cell type-specific gene expression in Norway spruce phloem 

      Nagy, Nina Elisabeth; Sikora, Katarzyna; Krokene, Paal; Hietala, Ari; Solheim, Halvor; Fossdal, Carl Gunnar (Journal article; Peer reviewed, 2014)
      The tangentially oriented polyphenolic parenchyma (PP) and radially organized ray parenchyma in the phloem are central in the defense of conifer stems against insects and pathogens. Laser micro-dissection enables examination ...
    • Using Optical Sensors to Identify Water Deprivation, Nitrogen Shortage, Weed Presence and Fungal Infection in Wheat 

      Peteinatos, Gerassimos G.; Korsæth, Audun; Berge, Therese W.; Gerhards, Roland (Journal article; Peer reviewed, 2016-05-26)
      The success of precision agriculture relies largely on our ability to identify how the plants’ growth limiting factors vary in time and space. In the field, several stress factors may occur simultaneously, and it is thus ...
    • Using Red List species in designating protection status to forest areas: a case study on the problem of spatio-temporal dynamics 

      Tingstad, Lise; Grytnes, John-Arvid; Sætersdal, Magne; Gjerde, Ivar (Peer reviewed; Journal article, 2020-08-12)
      Red-listed species are often used as target species in selection of sites for conservation. However, limitations to their use have been pointed out, and here we address the problem of expected high spatio-temporal dynamics ...
    • Utilisation of chemically modified lampante oil for wood protection 

      Schwarzkopf, Matthew; Burnard, Michael; Tverezovskiy, Viacheslav; Treu, Andreas; Humar, Miha; Kutnar, Andreja (Journal article; Peer reviewed, 2018-07-27)
      Within the Slovenian region of Istria, the olive growing and oil production industry is strong. This industry has a long history and the olives grown here have high levels of biologically active compounds including a variety ...
    • Validation of risk models for control of leaf blotch diseases in wheat in the Nordic and Baltic countries 

      Jørgensen, Lise Nistrup; Matzen, Niels; Ficke, Andrea; Nielsen, Ghita C.; Jalli, Marja; Ronis, Antanas; Andersson, Björn; Djurle, Annika (Peer reviewed; Journal article, 2020-05-30)
      Risk models for decisions on fungicide use based on weather data, disease monitoring, and control thresholds are used as important elements in a sustainable cropping system. The need for control of leaf blotch diseases in ...
    • Valorization of Tomato Surplus and Waste Fractions: A Case Study Using Norway, Belgium, Poland, and Turkey as Examples 

      Løvdal, Trond; van Droogenbroeck, Bart; Eroglu, Evren Caglar; Kaniszewski, Stanislaw; Agati, Giovanni; Verheul, Michel; Skipnes, Dagbjørn (Journal article; Peer reviewed, 2019-06-27)
      There is a large potential in Europe for valorization in the vegetable food supply chain. For example, there is occasionally overproduction of tomatoes for fresh consumption, and a fraction of the production is unsuited ...
    • The Value of Urban Farming in Oslo, Norway: Community Gardens, Aquaponics and Vertical Farming 

      Gustavsen, Geir Wæhler; Berglann, Helge; Jenssen, Elisabeth; Kårstad, Signe; Rodriguez, Divina Gracia P. (Peer reviewed; Journal article, 2022-01)
      Urban agriculture is increasingly recognized as an important sustainable pathway for climate change adaptation and mitigation, for building more resilient cities, and for citizens’ health. Urban agriculture systems appear ...
    • Variability in greenhouse gas emission intensity of semi-intensive suckler cow beef production systems 

      Samsonstuen, Stine; Åby, Bente Aspeholen; Crosson, Paul; Beauchemin, Karen A.; Wetlesen, Marit Smith; Bonesmo, Helge; Aass, Laila (Peer reviewed; Journal article, 2020-05-20)
      Emission intensities from beef production vary both among production systems (countries) and farms within a country depending upon use of natural resources and management practices. A whole-farm model developed for Norwegian ...
    • Variability in the Content of Phenolic Compounds in Plum Fruit 

      Liaudanskas, Mindaugas; Okuleviciute, Rugile; Lanauskas, Juozas; Kviklys, Darius; Zymone, Kristina; Rendyuk, Tamara; Žvikas, Vaidotas; Uselis, Nobertas; Janulis, Valdimaras (Peer reviewed; Journal article, 2020-11-20)
      The aim of this study was to determine the composition and content of phenolic compounds in extracts of plum fruit. Fruit of 17 plum cultivars were analyzed. Fruit samples were collected in 2019 from fruit trees with ...