337 uppsatser · sida 2 av 23
… aim of this study was to quantify the productivity and the costs of different harvesting systems (teams), containing harvesters equipped with accumulating harvester heads and forwarders, in first commercial thinnings were an integrated harvest of pulpwood and energy wood were …
simulering i Heureka med olika skötselprogram
… In such stands, it can often be expensive to do a conventional pulpwood harvest as a first thinning. This study investigates the development of the stands and the economic outcome of forest fuel extraction, or a combined harvest as alternatives to the ordinary pulpwood harvest …
Hur slagkraftig a?r dagens ha?llbarhetscertifiering och kan den föra?ndra mark- och vattenpa?verkan fra?n odlingarna?
… simulations showed five different scenarios where the cultivation differed in harvest type and how much fertilizers were added. This was to distiguince potential differences in the budgets of carbon and nitrogen. The largest environmental impacts is due to leakage of nutrients …
samiskt växtutnyttjande från 1600-talet fram till ca 1950
… which plants were the most commonly used, and when and how these plants were harvested. I also wanted to measure the quantities of Angelica archangelica and Rumex acestosa within traditional harvest sites. Furthermore I wanted to find out if the plant use differed among Sami …
… for pulpwood in early thinning, or if it is better to apply whole tree harvest. The study shall also give an indication if bio energy can be an economical interesting alternative for Sveaskog. Sampled trees represented the variation in the different stands. Five trees were …
… ploughing plus sowing with a Rapid sowing machine within 24 hours after harvest and shallow cultivation plus sown by broadcasting within 24 hours after harvest. The conclusion was that it was the establishment methods/dates that affected the uptake of nitrogen per hectare of the …
… crops. The great disadvantage of hemp is the lack of knowledge about spring harvest of the crop. Spring harvest of hemp as straw fuel produces benefits in combustion quality but appears to generate large field losses of biomass that have not yet been accounted for. A …
… carbon release instead. This study investigates the initial effects of stump harvesting on the emissions of three greenhouse gases, carbon dioxide, methane and nitrous oxide. The emissions were measured from the soil surface in a Norway spruce forest located in the southern part …
… leads to shorter periods of frozen ground in the forest. At the same time the harvesting machines are getting bigger and more powerful. The forest industry aim at an even wood flow, and the ground damage has to be as low as possible. The two biggest causes for ground-damage is …
substrate preferences and amounts of dead wood
… proportion of the volume of coarse dead wood in managed forests. Since stump harvest for biofuel may increase, the amount of dead wood will decrease even more, which may threaten biodiversity. The first aim of this study was to compare the amounts of fine woody debris (FWD,
implications for human harvest?
… moose hunter observations to investigate how wolf predation affects the human harvest of moose in Scandinavia. Since wolves prey on mostly juvenile moose during summer, analysis of their summer movement patterns is crucial to understand its impact on the human harvest later …
konsekvensanalys av fyra hushållningsstrategier för contortatall
… to increase growth and with short rotation periods allow a rapidly increased harvest level. Today a large proportion of the young forests owned by Holmen Skog, Iggesund are covered by Lodgepole pine and an active forest management is required to spread the harvested volume over …
från modell till verklighet
… from fossil fuels and instead increase our renewable fuels. With stump harvest in the forest it’s possible to increase the use of renewable fuels and reduce our emissions from fossil fuels. The main purpose of this study is to answer the economic question: ?Is it profitable to …
… at integrating the forwarding of the logging residue with the rest of the harvesting team. Sveaskog is currently extracting 44 % of the available amount of logging residue. Their goal is to extract 60 %.The objective of this study was to learn how five main topics affected the …
… was to review existing literature in order to describe the current status of harvester based measurement technology as the way to provide information for calculating payment to the forest owners. In addition to this, a short survey was conducted to find out how a switch to …
