نتایج جستجو برای: silviculture
تعداد نتایج: 667 فیلتر نتایج به سال:
چکیده ندارد.
we studied 11 gaps covered with beech saplings (< 1.30 m tall) in a reserve compartment (compartment 139, district one, langa forest, watershed 36: kazemrood) of the caspian beech forest in n iran. two transects, each 2 m wide, were laid along the longest (n-s) and shortest (e-w) axis of each gap. five micro sample plots, each 4 m2, were established: one at the center, and one at each corner. q...
In Sweden, where forests cover more than 60% of the land area, silviculture and the use of forest products by industry and society play crucial roles in the national carbon balance. A scientific challenge is to understand how different forest management and wood use strategies can best contribute to climate change mitigation benefits. This study uses a set of models to analyze the effects of di...
Claim of sustainability are virtually impossible to prove but enough is known about tropical forest ecology and silviculture to protect ecosystem functions and maintain biodiversity while still deriving financial profirs from logging . Rapid improvements in long-term forest production will derive from better planning of harvesting operations and stand improvement treatments. Lack of good manage...
1 Forest Ecology and Forest Management Group, Wageningen University, Wageningen, Netherlands, 2 Landscape Dynamics Unit, Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Birmensdorf, Switzerland, 3 Department of Forest Yield and Silviculture, Slovenian Forestry Institute, Ljubljana, Slovenia, 4 CREAF, Cerdanyola del Vallès, Spain, 5 Laboratory of Plant Biology and Nature Man...
Increasingly, forest management goals include building or maintaining resistance and/or resilience to disturbances in the face of climate change. Although a multitude of descriptive definitions for resistance and resilience exist, to evaluate whether specific management activities (silviculture) are effective, prescriptive characterizations are necessary. We introduce a conceptual framework tha...
In forest reserves of the U.S. Pacific Northwest, management objectives include protecting late-semi habitat structure by reducing the threat of large-scale disturbances like wildfire. We simulated how altering withinand among-stand structure with silvicultural treatments of differing intensity affected late-seral forest (LSF) structure and fire threat (FT) reduction over 30 years in a 6070-ha ...
Considerations of economic potential, past utilization, habitat, ecology, and silviculture are brought together in nine recommendations for managing tanoak in northern California. These include seeding acorns point up, establishing new stands from root crown sprouts, thinning existing young-growth stands, beginning stands from nursery stock planted at different spacings and learning spacing and...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید