12 uppsatser
i stormen Pers fotspår
Wind damages next to strip roads in 1st and 2nd thinning in Boxholm, Östergötland Anneli Fransson, SLU, inst f sydsvensk skogsvetenskap, Examensarbete no 108 Wind damage is something we are all familiar with since the storms Gudrun (2005) and Per (2007). Research about strip …
… and forwarders. The most common model in thinning with a harvester is strip-road operated thinning and stand-operated thinning with one intermediate passage between the strip-roads. This study is a time study with some quality follow ups on a strip-road operated thinning model …
… Previous studies also indicated increasing risk of wind throw along the strip roads. The aim of the present study was to investigate wind damage in Norway spruce stands in South Sweden in relation to time of the first thinning and different pattern of strip roads (width, length …
the importance of landscape structure and forage availability
Bark-stripping by red deer (Cervus elaphus) cause extensive damage to economically valuable spruce trees (Picea abies) in Swedish forests. The underlying causes for bark-stripping are not fully understood, and the frequency and severity of damage unpredictably differ between …
Bark-stripping by red deer (Cervus elaphus) cause extensive damage to economically valuable spruce trees (Picea abies) in Swedish forests. The underlying causes for bark-stripping are not fully understood, and the frequency and severity of damage unpredictably differ between …
… collected by inventory in a number of stands with circle-area survey and with strip survey, which is method that is used for self-checking. The results show that the strip survey does not diverge more than ±10 % in measuring values of basal area, number of stems, roads share …
… were inventoried in 2004 and 2005, chosen resultssuch as thinning grade, strip-road width and the distance between strip roads were used asadditional data in correlation matrix.It was found that:? The average volume of dead trees in the inventoried 91 lodgepole pine stands was …
… Jämtland districts and the purpose was to: investigate if the use of digitized strip roads obtained from thinning a few years earlier increases productivity (ha/h) and efficiency (fertilized area per traveled kilometer) in forest fertilization with tractor.The efficiency …
Orsaker till olyckor och rekommendationer om hur dessa kan förebyggas
… all drivers were sober. One third could have survived if all roads had rumble strips. Half of the deceased might have survived in cars with electronic stability control system. 90 percent of the deceased people could have survived in cars equipped with the latest safety …
… density 1647 trees/ha. Twenty percent of the total surface of the stand were strip roads, and the average width of the strip road was 4.3 m. The number of damaged residual trees correspond to 2% of the total number of residual trees. The total time consumption including harvest …
Det finns en rad satt att beskriva gallringsformen. Ofta används begreppet gallringskvot i dessa sammanhang utan att närmare ange vilken metod eller definition som använts for att beräkna den. Detta kan lätt leda till att missuppfattningar uppstår. Denna studie belyser olika …
… from young stands showed promise. In such a model areas to compose future strip roads are left untreated at pre-commercial thinning, and biomass is thus allowed to accumulate in these areas until first commercial thinning/harvest is carried out.
