نتایج جستجو برای: regeneration felling
تعداد نتایج: 61375 فیلتر نتایج به سال:
Despite numerous studies there are still uncertainties regarding regeneration strategies that optimal for productivity and profitability. Thus the aim of this study was to establish effects three methods (planting, direct seeding natural regeneration) on production profitability Scots pine (Pinus sylvestris L.) stands in southern Sweden. Long-term stand development simulated, with StandWise app...
Spring felling of standing residuals left after a commercial clearcut, controlled burning the following summer, and hand planting of approximately 450 pine seedlings per acre can produce productive pine-hardwood mixtures on many medium sites in the Southeast. Stand establishment costs are approximately one-half that for conventional pine plantations using intensive site-preparation techniques. ...
the log damage and value loss were examined by felling and bucking function, species, and damage type, in kheyrud forest in namkhaneh district in the hyrcanian forest of iran. in order to calculate the wood value following tree felling and bucking, 250 trees and 167 logs consisting of beech and hornbeam species were measured. there were five types of damage recorded following the tree felling o...
Post-WWII displacements in the Polish Carpathians resulted widespread land abandonment. Most of pre-war agricultural areas are now covered with secondary forests, which will soon reach felling age. Mapping their exact cover is crucial to investigate succession–regeneration processes and determine role landscape, before making management decisions. Our goal was map post-agricultural forests East...
Small rodents (Rodentia, subfam. Murinae: real mice, Arvicoline voles) greatly affect natural regeneration, stability and dynamics of forest communities worldwide. Every 3–4 years rodent damage in Croatian state forests is the most severe regeneration stands, especially pedunculate oak (Quercus robur L.) narrow-leaved ash (Fraxinus angustifolia Vahl.) forests, where can seriously impede by dama...
Changes in aboveground and forest floor mass, carbon (C), and nitrogen (N) pools were quantified on three sites in the southern Appalachians 2 yr after felling and burning. Before felling and burning, stands were characterized by sparse overstories and dense Kalmia latifolia L. understories. Two years after burning, foliar C and N pools had reached 25% and 29% of pretreatment levels, respective...
Abstract The article provides an overview of the experience using shelterwood systems in Estonia and methodological aspects their economic assessment. methodology is tested with calculations made on management alternatives pine ( Pinus sylvestri s L.) stand Rhodococcum site type. Based Estonian forest rules results previous silvicultural studies, models were elaborated for different types harve...
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