نتایج جستجو برای: sustainable forest management in caspian forests of iran requires cost

تعداد نتایج: 24523476  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی 1389

the caspian sea contains great resources of oil and gas. the caspian sea is a 700- mile- long body of water in central asia, land located between azerbaijan, iran, kazakhstan, russia and turkmenistan. iran was challenges and opportunities in the caspian region. key question in this thesis includes three section that first question, opportunities of iran in the caspian region, second question ch...

Information on the productivity, costs and applications of the logging system is a key component in the evaluation of management plans for the rehabilitation and utilization of Caspian forests. Skidding and road construction costs are expensive forest operations. Determining the optimum forest road network density is one of the most important factors in sustainable forest management. Logging me...

Journal: :caspian journal of environmental sciences 2009
s. mohammadi limaei r. naghdi

information on the productivity, costs and applications of the logging system is a key component in the evaluation of management plans for the rehabilitation and utilization of caspian forests. skidding and road construction costs are expensive forest operations. determining the optimum forest road network density is one of the most important factors in sustainable forest management. logging me...

2018

Cut-to-length (CTL) timber harvesting technology currently accounts for approximately 90% of Caspian forests. The technology involves felling, branching, cross-cutting, and then the skidder carries the logs to a landing, where the timber is temporarily stored, sorted and assembled for transportation to the mill. Cut-to-length systems typically require less labor, less access road construction, ...

2018

Cut-to-length (CTL) timber harvesting technology currently accounts for approximately 90% of Caspian forests. The technology involves felling, branching, cross-cutting, and then the skidder carries the logs to a landing, where the timber is temporarily stored, sorted and assembled for transportation to the mill. Cut-to-length systems typically require less labor, less access road construction, ...

2018

Cut-to-length (CTL) timber harvesting technology currently accounts for approximately 90% of Caspian forests. The technology involves felling, branching, cross-cutting, and then the skidder carries the logs to a landing, where the timber is temporarily stored, sorted and assembled for transportation to the mill. Cut-to-length systems typically require less labor, less access road construction, ...

Journal: :جنگل و فرآورده های چوب 0
فرشاد کیوان بهجو استادیار دانشگاه محقق اردبیلی باریس مجنونیان استاد دانشگاه تهران منوچهر نمیرانیان استاد دانشگاه تهران جهانگیر فقهی دانشیار دانشگاه تهران ارسطو سعید استادیار بازنشسته دانشگاه تهران

sustainable forest management in caspian forests of iran requires cost-benefit analysis in order to maintain the quality of timber stands during logging operations. this study was done with the aim of cost and gross revenue computations from current logging (net present value) in three adjacent compartments in district 2 of shafroud watershed. motion and time studies were carried out during fel...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه گیلان - دانشکده فنی 1392

due to lack of knowledge management system in the organization of technical and vocational university of iran (tvuni) and losing good employees because of retirement and substitution causes huge amount of costs to replace the similar expertise. there is no any suitable system in the tvuni to store, to document, and to distribute knowledge. based on the university’s features such as it has diffe...

پایان نامه :0 1371

in order to examine the ecological conditions and characteristics of fraxinus excelsior l. in the northern forests of iran 6 main areas as well as some miscellaneous ones , have been selected in the region respectively in : lomir2, shafaroud , park - e-noor , ahlam , alandan and noor.

Journal: :محیط زیست طبیعی 0
زهرا نوری دانش آموختۀ دکتری جنگل داری، دانشکدۀ منابع طبیعی، دانشگاه تهران، ایران محمود زبیری استاد گروه جنگل داری و اقتصاد جنگل، دانشکدۀ منابع طبیعی، دانشگاه تهران، ایران جهانگیر فقهی دانشیار گروه جنگل داری و اقتصاد جنگل دانشکدۀ منابع طبیعی، دانشگاه تهران، ایران محمدرضا مروی مهاجر استاد گروه جنگل داری و اقتصاد جنگل، دانشکدۀ منابع طبیعی، دانشگاه تهران، ایران

beech forests in midland areas of hyrcanian forests of iran are the most important forests having the highest degree of naturalness. these forests are the valuable source of wood production and other forest products. one of the most important characteristics of plant communities is the spatial pattern of trees. ecological process in forest ecosystems are directly influenced by the spatial patte...

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