224 uppsatser · sida 7 av 15
The purpose of this study was to compare naturally regenerated Scots pine (Pinus sylvestris (L.)) against seeded Scots pine in terms of benefits and differences. An inventory was performed at a number of different sites, 4 ? 6 years after soil scarification and data on the …
a look at Finnish and Swedish forest practices and their applicability in British Columbia’s Interior forests
… forestry practices could be adopted in the BC context. The mountain pine beetle (Dendroctonus ponderosae Hopkins) has created significant forest planning problems in BC. The annual allowable cut (AAC) was raised to capture beetle-killed timber while still merchantable. These …
… into bunches based on diameter. Thus three fractions were created. Furthermore pine, spruce and birch were kept apart. Three methods of delimbing were utilized. (1)Bunches were kept and treated as such, (2) single trees were delimbed by breaking branches and (3) single trees …
… to prevent browsing damage on the commercially important tree species Scots pine. In this study I have tested a new alternative way to increase the available amount of forage and increase the use of these resources by especially moose. The method is based on a slash treatment at …
… each one of the tested harvesters. Logs of log-types middle- and topplogs of pine and spruce was cheched and were a part of the study. 56 percent of the logs were pinelogs and 44 percent of the cheched logs were sprucelogs. 85,3 percent of the logmaterial had an diameter between …
a comparison between clear-cuts areas with and without retention trees in pine forests
Under det senaste årshundradet har de svenska skogarna genomgått en omfattande förvandling, från mer eller mindre naturligt dynamiska till hårt brukade skogar bestående av monokulturer av tall eller gran. Denna förändring har lett till en minskning av den biologiska mångfalden …
The wide distribution range of our boreal pine (Pinus sylvestris L.) provides a great variation in growing conditions and climate/weather factors that influence the wood development of the trees. A great number of extensive studies have been conducted over the years in order to …
… regarding rnachine resources in the ranger district ” five assortments; pine and spruce timber, pulpwood of softwood, fresh cut spruce and hardwood ” four cross-cutting alternatives; minimal top-diameter of timber; 12, 14, 16, 18 cm. A result from an optimization gives a logging …
en bakgrundsstudie samt simulering av inventeringsmetoders inverkan på noggrannhet i leveransprognoser till sågverk
… after clear cutting, the results are presented as total volumes of timber for pine and spruce. The results from the stud y indicate that the marginal benefit of sampling 25 sample plats, instead of 10, is small. The standard error of the estimate of total volumes is lowered by …
vegetations- och markanvändningshistoria i Läde, Dalarna
… alder, birch and spruce decreased, and the forest came to be dominated by pine. At the end of the medieval period, an agricultural regression occurred, probably a result of a more general medieval agricultural crisis. After tempo-rary abandonment, agriculture re-established for …
en pollenanalytisk studie av en skvattramtallmyr i Tyresta nationalpark, Södermanland
… (c 6000 cal BC to c cal AD 700); 4. Open Sphagnum-mire (c cal AD 700-1100); 5. Pine bog (c cal AD 1100-present). The relationship between the occurrence of Ledum-Pinus-mires (a swampforest-type frequent in the area) and fire is discussed. Climate, fire and human activity are the …
en analys av orsaker och effekter
… is due to facilitate the growth for newly planted saplings of spruce or pine in former areable areas or in entirely felled forest areas. This paper contains a description of the reasons for the lowering projects, and ditching, based on a question from the local environmental …
… flame exposure and propensity for continued combustion of standing CWD of pine (Pinus sylvestris). Two types of CWD were studied. Firstly, wood that had been dead for one to ten years. Secondly, wood that had been dead for several decades. In the burning experiments, logs of …
ett exempel på medbestämmande planering
… varying with different ages and characters. The most common tree species is pine (Pinus sylvestris), birch (Betula pendula, Betula pubescens), aspen (Populus tremula) and sallow (Salix caprea). There is also a lot of juniper (Juniperus communis) in many parts of the area. By …
skogshistoria och markutnyttjande i Vuornavagge under 300 år
… Gran Sami villages utilized the area long before 1500 A.D. Sami people peeled pine trees to use the inner bark as food and for storage of reindeer sinews, and the resultant Smi bark peelings can still be found in the forest. The first Swedish settlers in Ammarnäs arrived at the …
