نتایج جستجو برای: and forest

تعداد نتایج: 16850233  

Journal: :journal of rangeland science 2013
azadeh afrigan mohammad jafari sara jamalpour arghavan shahlayie

the purpose of this study was identifying rangeland development andrestoration operations targets. this study was conducted in hossein abad bazoft basinwith 7162 ha area, located in south east of farsan county, chaharmahal and bakhtiariprovince, iran. the basin has various land uses including rangeland, forest, irrigated farmand garden, dry farm, residential area and rock mass. in this study, d...

Journal: :international journal of advanced biological and biomedical research 2013
mozhgan bazyar abdolaslam bonyad sasan babaie kafaki

the zagros forests (west of iran) have been highly exploited in recent decades by human impacts. easy access, abundance and variety of valuable forest yields have led to population growth density, creation of new residential areas and deforestation activities. in order to determinate the distribution and rate of deforestation from 1995 to 2006 by using the satellite imagery (irs-1c and  landsat...

Journal: :caspian journal of enviromental sciences 0

the aim of this research was to measure the relative efficiency of forest management plans in north of iran. in order to fulfill the research, data of 12 forest management plans were collected from the financial balance sheets of shafaroud forest company during a ten years period. first of all, basic data envelopment analysis (dea) models (bcc and ccr) were used to determine the efficiency. the...

سوسنی, جواد, شتایی, شعبان, مسروری, الهام, معیری, محمدهادی,

     Zagros forest as a widest forests of Iran, has a special place on economical development and maintain the stability of water and soil. In order to apporopriate planning for this forest information about forest extend during past, present and future is necessary. The present research was conducted to determine the forest area reduction, during 1955 to 1997, Modeling possibility forest exten...

ژورنال: علوم آب و خاک 2009
اسلام بنیاد, امیر, توانکار, فرزام, مجنونیان, باریس,

Forest future depends on forest stands regeneration. Soil is one of the principal capitals in the forest area. It is important to minimize damages to the forest ecosystem during logging operation. In forestry and forest management, it is significant to know the effect of forest logging damages on regeneration, sapling and soil compaction. This study was carried out in Asalem Beech forest area, ...

اسلام بنیاد, امیر, توانکار, فرزام, مجنونیان, باریس,

Forest future depends on forest stands regeneration. Soil is one of the principal capitals in the forest area. It is important to minimize damages to the forest ecosystem during logging operation. In forestry and forest management, it is significant to know the effect of forest logging damages on regeneration, sapling and soil compaction. This study was carried out in Asalem Beech forest area, ...

Journal: :محیط زیست طبیعی 0
آرش کرمی کارشناس ارشد رشتۀ جنگلداری و اقتصادجنگل دانشکدۀ منابع طبیعی، دانشگاه تهرا جهانگیر فقهی دانشیار گروه جنگلداری و اقتصاد جنگل دانشکدۀ منابع طبیعی، دانشگاه تهران محمدرضا مروی مهاجر استادگروه جنگلداری و اقتصاد جنگل دانشکدۀ منابع طبیعی، دانشگاه تهران

without doubt is one important aspects of sustainable forest management the continuing forest regeneration. identify and determine is effective dispersal and distribution pattern of regeneration patches in various types of forest and its evolution, in maintaining biodiversity in natural ecosystems. purpose was chosen of gorazbon district kheyrod forest for study, all patches regeneration were l...

Journal: :محیط زیست طبیعی 0
شریف جورابیان شوشتری کارشناس ارشد محیط زیست، دانشکدۀ منابع طبیعی، دانشگاه تربیت مدرس عباس اسماعیلی ساری استاد گروه محیط زیست، دانشکدۀ منابع طبیعی، دانشگاه تربیت مدرس سید محسن حسینی دانشیار گروه جنگلداری، دانشکده منابع طبیعی، دانشگاه تربیت مدرس مهدی غلامعلی فرد دانشجوی مقطع دکتری و بورسیه هیئت علمی گروه محیط¬زیست، دانشکده منابع طبیعی، دانشگاه تربیت مدرس.

this study was performed with objective land cover change prediction (forest, agriculture, residential and orchard) using logistic regression and markov chain in the gis environment in east of mazandaran province. land cover change detected using satellite imageries belonging to the years 1987 and 2001. transition potential modeling was conducted using a logistic regression. seven variables (de...

Journal: :international journal of environmental research 2015
v. v. brygadyrenko

specific features of the structure of the ground litter invertebrate community in forest belt ecosystems in the ukrainian steppe zone have been considered. for 14 years invertebrate fauna of the litter of 176 forest belt sites with different composition has been studied with the aid of soil traps. the main characteristics of litter invertebrate communities (total population, a number of species...

Forest types mapping, is one of the most necessary elements in the forest management and silviculture treatments. Traditional methods such as field surveys are almost time-consuming and cost-intensive. Improvements in remote sensing data sources and classification –estimation methods are preparing new opportunities for obtaining more accurate forest biophysical attributes maps. This research co...

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