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.
2024
Authors
Marian Schönauer Stephan Hoffmann Lorenz Breinig Thilo Wagner Filippo Guerra Dirk JaegerAbstract
Large clear-cut areas as a consequence of drought and bark beetle infestations necessitate extensive replanting efforts in German forests, leading to an increased interest in efficient planting systems. In addition to manual planting, mechanized and semi-mechanized systems utilizing surplus forest machine capacities available after completion of salvage logging operations are likely required for timely reforestation of the clear-cut areas. A semi-mechanized system utilizing a standard forwarder with a grapple-actuated soil borer for both, the transport of planting material and the preparation of planting pits, combined with two workers carrying out manual planting, was investigated in a time-and-motion study. The frequency method was used after video recording of a planting operation that covered an area of approximately 1.2 hectares. A total of 815 alder saplings (Alnus glutinosa L.) with heights of 1.2–1.5 m were planted. Observed productivity was 93 saplings per system work hour (SWH). With additional placement of stakes for stabilizing the plants, the productivity decreased to 42 saplings per SWH. While directly comparable results were not found in the literature, available productivity figures of purely manual planting systems do not suggest an increased productivity of this semi-mechanized system. Considering ergonomics, however, forwarder utilization provides reduced workload not only in plant hole preparation but also with material transport and clearing of planting spots. Both the ergonomic aspects of the system and, in particular, the suitability of the soil borer for different soil textures should be further investigated.
Authors
Adriana Dorota Osinska Ahmed Bargheet Agnieszka Cuprys Ida Marie Luna Fløystad Hans Geir Eiken Kenneth William Lindstedt Veronika Kucharová Pettersen Arnfinn Sundsfjord Yngvild WastesonAbstract
No abstract has been registered
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No abstract has been registered
Authors
Markus Koch Mikael Forsman Henrik Enquist Henrik Baare Olsen Karen Søgaard Gisela Sjøgaard Tove Maria Østensvik Petter Nilsen Lars Louis Andersen Markus Due Jacobsen Mikkel Brandt Rolf Westgaard Paul Jarle Mork Xuelong Fan Morten Wærsted Kaj Bo VeierstedAbstract
No abstract has been registered
Authors
Frank T. Ndjomatchoua Ritter Atoundem Guimapi Luca Rossini Byliole S. Djouda Sansao A. PedroAbstract
No abstract has been registered
Authors
Adam Eindride Naas Lasse Torben Keetz Rune Halvorsen Peter Horvath Ida Marielle Mienna Trond Simensen Anders BrynAbstract
There is an increasing need for ecosystem-level distribution models (EDMs) and a better understanding of which factors affect their quality. We investigated how the performance and transferability of EDMs are influenced by 1) the choice of predictors and 2) model complexity. We modelled the distribution of 15 pre-classified ecosystem types in Norway using 252 predictors gridded to 100 × 100 m resolution. The ecosystem types are major types in the ‘Nature in Norway' system mainly defined by rule-based criteria such as whether soil or specific functional groups (e.g. trees) are present. The predictors were categorised into four groups, of which three represented proxies for natural, anthropogenic, or terrain processes (‘ecological predictors') and one represented spectral and structural characteristics of the surface observable from above (‘surface predictors'). Models were generated for five levels of model complexity. Model performance and transferability were evaluated with data collected independently of th
Abstract
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Authors
Habtamu AlemAbstract
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Authors
Carl-Fredrik Johannesson Klaus Steenberg Larsen Hanna Marika Silvennoinen Holger Lange Jenni NordénAbstract
No abstract has been registered
Authors
Arthur F. Boom Jérémy Migliore Dario Isidro Ojeda Alayon Esra Kaymak Olivier J. HardyAbstract
No abstract has been registered