Indelning av trakter inför gallring på Holmen Skog
en utvärdering av svårigheter och möjligheter
… since every district has to reach a minimum limit according to the estimated harvest level made at the head office.
Uppsatser om harvest
337 uppsatser · sida 21 av 23
Simulering av gallring med noll, ett eller två beståndsstråk mellan stickvägarna och jämförelse av drivningskostnader
Vid gallring med normalstora skördare och skotare används vanligtvis noll, ett eller två beståndsstråk mellan stickvägarna. Arbetsmetodiken har studerats empiriskt, men med en begränsad omfattning per studie. Fördelen med simulering som studiemetod är att man med bra modeller …
Vattenlogistik vid stubbehandling i slutavverkning
… is configured as well as a sufficient amount of water is carried out on the harvester to get a cost? effective treatment. The flow control of the equipment has improved and water can be dispensed more efficient, but still the amount of water on the machine is a crucial factor in …
Biomassauttag vid delkvistat sortiment i klen gallring
… operations depends on the products generated as well as the performance of the harvesting systems. Conversion tables designed to predict the outcome based on harvesting method was another goal of this study. Removal of biomass affects the nutrient composition of the site …
Rissepareringens effekter på viltets nyttjandegrad av GROT
… resources by especially moose. The method is based on a slash treatment at harvest, where the accessibility of slash as forage is increased during final felling or commercial thinning by gathering the slash and putting the Scots pine slash on top of the slash piles. This study …
Förekomst & kostnad av kapsprickor i stormaskadad skog
… this study where to investigate the frequency of cutting cracks in saw timber harvested in the storm-damaged forests in regions where the storms Hilde and Ivar hit. The idea for this work came from one of the region’s biggest actors, SCA Skog and Jämtlands district. The purpose …
Långsiktig förändring av fosforhalt och skördenivåer för jordar med höga P-AL-tal
en analys av försöksserien "Exploatering av höga fosfortillstånd"
… three treatments, one unfertilized control (A), one aiming at replenishment of harvest removal, i.e. fertilized with 15 kg P ha-1 year-1 (B) and one over-fertilized (C) with 30 kg P ha-1 year-1. In this thesis data from the five longestrunning study sites are analysed based on …
Environmental variables determining the occurrence of the red-listed Carbonicola anthracophila and C. myrmecina in boreal forests
… in order to identify resin rich, fire-scarred pine dead wood, as well as harvesting and planting techniques which take old, fire-scarred pine dead wood into consider-ation and prescribed burning of protected forest stands with a fire frequency similar to those in undisturbed …
Vermicompost for reduction of vegetable waste - and a possible means to produce fish feed in aquaponic systems?
… can be reused as worm feed in the compost and the protein rich worms can be harvested, dried and grinded and brought back to the aquaculture as fish feed. As a first step in this direction, I have investigated the effect of recycling of vegetable waste in vermicomposts on the …
Towards sustainable rye cultivation
soil carbon and yield modelling for crop rotations with rye
… left on the field, only synthetic fertilizer. Labelled ”+straw-BD”. ? Straw harvested, biogas digestate added as fertilizer. Labelled ”-straw+BD”. ? Straw harvested, only synthetic fertilizer. Labelled ”-straw-BD”. on clay soil with 1 %, 2 % or 2.5 % carbon in top soil at start …
Effekter av kalavverkning på mindre boreala sjöars vattenkvalitet
… industry in Sweden, with clear-cut as the most commonly used method for harvesting. Here the long-term impact of clear-cut on lake water quality (dissolved organic carbon (DOC), nitrogen, phosphorus and pH) has been investigated, based on 23 lakes sampled during autumn. Data for …
Vad orsakar skador på kvarstående träd vid mekaniserad gallring - en intervjustudie
… mechanized thinning. Interviews have been made with drivers of single grip harvesters and forwarders in forest thinning and a number of essential factors have been identified as the most important to take into account in order to minimize and/orprevent injuries to stems and …
Dagvattenhantering och takpark för projektet PARK 1
Ett utredande förslag
Som följd av den pågående urbaniseringen har de naturliga förutsättningarna för regn och smältvattnet att infiltrera i marken och återgå till sitt kretslopp på naturlig väg försvunnit i städerna. I Stockholm leds ungefär hälften av dagvattnet via VA-nätet direkt och orenat till …
Sjukdomar i vallgräs
uppdatering av Faktablad om växtskydd -Sjukdomar i vallgräs (95 J)
… and are not visible on the outside. To a large extent mainly the quantity of harvest is affected and not the quality. While there are diseases that also affect quality such as Claviceps purpurea and Epichloë typhina, that can harm the animals that eat grass.
Supply & value chain analysis of onions in Ethiopia
… crop. Previous studies on fruits and vegetables in Ethiopia points at post-harvest losses between 15% and 70%. To estimate the losses for onions in Ethiopia a supply and value chain analysis has been made. A literature review on supply chain management, value chain analysis …