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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.

NIBIO's Scientific Publications →

2019

Authors

Tomas Persson Mats Höglind Marcel van Oijen Panu Korhonen Taru Palosuo Guillaume Jégo Perttu Virkajärvi Gilles Bélanger Anne-Maj Gustavsson

Abstract

No abstract has been registered

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Authors

Katrine Eldegard Janneke Scholten Jogeir N. Stokland Aksel Granhus Marit Helene Lie

Abstract

No abstract has been registered

Authors

Habtamu Alem Gudbrand Lien Hardaker J. Brian

Abstract

No abstract has been registered

Authors

Dilli Prasad Rijal Kelsey Lorberau Jutta Kapfer Leif-Einar Støvern Inger Greve Alsos Kari Anne Bråthen

Abstract

No abstract has been registered

Authors

Ralf Rautenberger Stig A. Borgvang

Abstract

No abstract has been registered

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Authors

Francisco Javier Ancin Murguzur Gregory Taff Corine Davids Hans Tømmervik Jørgen A.B. Mølmann Marit Jørgensen

Abstract

Ruminant fodder production in agricultural lands in latitudes above the Arctic Circle is constrained by short and hectic growing seasons with a 24-hour photoperiod and low growth temperatures. The use of remote sensing to measure crop production at high latitudes is hindered by intrinsic challenges, such as a low sun elevation angle and a coastal climate with high humidity, which influences the spectral signatures of the sampled vegetation. We used a portable spectrometer (ASD FieldSpec 3) to assess spectra of grass crops and found that when applying multivariate models to the hyperspectral datasets, results show significant predictability of yields (R2 > 0.55, root mean squared error (RMSE) < 180), even when captured under sub-optimal conditions. These results are consistent both in the full spectral range of the spectrometer (350–2500 nm) and in the 350–900 nm spectral range, which is a region more robust against air moisture. Sentinel-2A simulations resulted in moderately robust models that could be used in qualitative assessments of field productivity. In addition, simulation of the upcoming hyperspectral EnMap satellite bands showed its potential applicability to measure yields in northern latitudes both in the full spectral range of the satellite (420–2450 nm) with similar performance as the Sentinel-2A satellite and in the 420–900 nm range with a comparable reliability to the portable spectrometer. The combination of EnMap and Sentinel-2A to detect fields with low productivity and portable spectrometers to identify the fields or specific regions of fields with the lowest production can help optimize the management of fodder production in high latitudes.

2018

Authors

Mekjell Meland Radoslav Cerovic Fuad Gasi Milica Fotiric-Aksic

Abstract

No abstract has been registered

Authors

Tore Skrøppa

Abstract

No abstract has been registered

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Authors

Keni Ren Grete H. M. Jørgensen Inger Hansen johannes karlsson

Abstract

No abstract has been registered

Authors

Keni Ren Grete H. M. Jørgensen Inger Hansen johannes karlsson

Abstract

No abstract has been registered