Simon Berg
Research Scientist
Biography
The majority of my work at NIBIO has revolved around managing and analysing large data sets. This work can be categorised into three main areas: analysing StandForD-files from forest machines, conducting extensive simulations of forest machines, and studying CANBUS data from timber trucks. In addition to this work, I have participated in more traditional forest operation research, such as time studies and work quality measurements.
Previus experiance
My academic journey began at the Swedish University of Agricultural Sciences (SLU), where I pursued a forester education (Master of Science in Forestry). My studies focused on raw material supply and production planning. I furthered my education at SLU with PhD studies in forest technology, considering "Technology and Systems for Stump Harvesting with Low Ground Disturbance". Following my PhD, I spent a year as a postdoctoral researcher at the University of Tokyo. There, I worked with small forwarders in steep terrain. I then returned to SLU to work on logistics around terminals and the transfer of GIS knowledge.
My PhD project, in more detail, included measuring ground disturbance, simulating the productivity of different stump harvesting systems, analysing costs, developing an experimental rig for stump twisting, and conducting time studies. This PhD project was part of the research school FIRST, which led me to spend a year on other research studies. These studies encompassed measuring temperature and gas emissions during the storage of peat and sawdust, conducting productivity studies, and investigating the variation in moisture content of forest fuel chips to estimate the necessary number of samples for different measurement precision. As a post-doc, my work included productivity studies and cost analysis of Japanese forwarders and separate loaders in steep terrain. I also collaborated on a study about the comminution of forest fuel. During my second tenure at SLU, I work with the potential benefits of open terminals and conducted an economic evaluation of different terminal locations, considering harvest, transportation, and capital costs.
Abstract
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Abstract
No abstract has been registered
Abstract
Butt rot is a main defect in Norway spruce (Picea abies (L.) Karst.) trees and causes large economic losses for forest owners. However, little empirical research has been done on the effects of butt rot on harvested roundwood and the magnitude of the resulting economic losses. The main objective of this study was to characterize the direct economic losses caused by butt rot in Norway spruce trees for Norwegian forest owners. We used data obtained from seven cut-to-length harvesters, comprising ∼400,000 trees (∼140,000 m3) with corresponding stem profiles and wood grade information. We quantified the economic losses due to butt rot using bucking simulations, for which in a first case, defects caused by butt rot were included, and in a second case, all trees were assumed to be free of butt rot. 16% of trees were affected by butt rot, whereby butt rot tended to occur in larger trees. When butt rot was present in a tree, the saw log volume was reduced by 48%. Proportions of roundwood volume affected by butt rot varied considerably across harvested stands. Our results suggest that butt rot causes economic losses upwards of 7% of wood revenues, corresponding to € 18.5 million annually in Norway.