نتایج جستجو برای: selective felling
تعداد نتایج: 199877 فیلتر نتایج به سال:
The objects of research were forest plantations, passed through renovation rubles in the Arkhangelsk forestry region. Trial plots established spruce plantations (bilberry and sphagnum forest), on fresh haulage, apiary, old haulage after felling more than 30 years ago. Based results research, a model was built, with help which it is consistently assessed during course what happens to stand cutti...
Biomass derived from small-diameter, dense, thinning stands is largely underutilized within the European Union, mainly because of in-effective harvesting methods and cutting technology, leading to high supply costs. Therefore, efficacy boom-corridor (BCT) selective (ST) on harvester felling bunching productivity was compared for first whole tree biomass in dense stands. BCT working method when ...
در این نقد و بررسی در باره خواص و انواع مختلف الکترودهای ion-selective شیشه ای، الکترودهائی با غشاء مایع و الکترودهای جامد میباشند بحث شده است . همچنین مکانیزم کلی هر سه نوع الکترود و موارد استعمال کامل آنها در الکتروشیمی بررسی شده است .
-A chipper-fonuarder system offers an alternative for biomass hawcstfng. Components are a small feller buncher for felling and bunching. and a chipper-forwarder that chips at the pile and transports the chips to roadside. In a case study on a mixed pine and hardwood site in Georgia after conventional hawesting, production rates and cost estimates for a prototype chfpperforwarder were developed....
Prolonged exposure to hand-arm vibration (HAV) generated by chainsaws can cause HAV syndrome, i.e., disorders in the upper extremities of forestry workers. Progress of HAV syndrome depends on the intensity of mechanical vibration transmitted throughout the body, which is directly proportional to coupling forces applied by the woodcutter to a vibrating tool. This study aimed to establish a metho...
Industrial logging has become the most extensive land use in Central Africa, with more than 600,000 square kilometers (30%) of forest currently under concession. With use of a time series of satellite imagery for the period from 1976 to 2003, we measured 51,916 kilometers of new logging roads. The density of roads across the forested region was 0.03 kilometer per square kilometer, but areas of ...
Aim . To summarise information provided so as to allow us compile a modern understanding of the breeding ranges, abundance and biology Great Spotted Eagle Aquila clanga , rare species in Altai Territory Republic. Material Methods While studying distribution, nesting Eagle, we used generally accepted methods with certain modifications. The was observed during foot car surveys. get an idea distri...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید