sohrab moradi | Payame Noor University (PNU) (original) (raw)
Papers by sohrab moradi
3 Abstract: In this study, in order to develop an appropriate sampling method for inventory in un... more 3 Abstract: In this study, in order to develop an appropriate sampling method for inventory in un-even aged and mixed forest, a systematic random sampling (SRS) along with forest cruising method was suggested in which basal area and distribution of trees number in diametric classes have no significant difference with full callipering (at 95% level). Real type and amount of rare and thick trees was also suggested to be measured. For this study three parcels (312,313,319) of GORAZBON district in Kheyrood-Kenar, NAUSHAHR-(IRAN) were selected. And In order to compare and investigate SRS along with forest cruising method, SRS method (currently used in un-even aged and mixed Forests) and full callipering (the comparison base for other methods) were selected. Results of Kolmogoroff-Smirnoff (K.S) and paired t-tests for comparing number and basal area of trees per hectare in diametric classes that obtained from full callipering and sampling methods showed that there is no significant differ...
International Journal of Agriculture Innovations and Research, 2014
The first step in protecting and preservating forest ecosystems is identification of genetic rese... more The first step in protecting and preservating forest ecosystems is identification of genetic reservoirs. Wild pistachio (Pistachio mutica F & M) forests are widely distributed throughout most parts of Zagros Mountain Ranges of Iran. These plants have edible fruits with extractable juice usable in pharmaceuticals, gums, paints, pesticides, pastes, perfumes and mineral oil industries. The habitats of this species in Salas babajani region, approximately with total area of 24000 ha can be observed in four open forest types including Quercus spp – pistacia spp, pistacia sppAcer monpessulanum, pistacia spp – Amygdalus spp and pistacia spp. In this research, regarding the distribution area, elevation, slope and aspect characteristics of wild pistachio, different maps were provided using GIS, then were overlaid the map of distribution area of wild pistachio with maps of elevation, slope and aspect. The results obtained from statistic analysis, showed that 93.26% of habitats of wild pistachi...
Landslides or mass movements are the phenomena, occurred by geomorphologic deforming. These pheno... more Landslides or mass movements are the phenomena, occurred by geomorphologic deforming. These phenomena are some kind of destruction, which is formed in the result of reaction among inner & outer land forces. This study has been carried out with the aim of recognizing & revealing the causes of landslides, their effect on structures, their shape in the related basin area and finally providing the applied maps for environment recognition & management of this area. Having studied the geologic qualities, climate, geomorphology, slope, physiography, hydrology, soil and vegetation cover, also by field studying of the basin area and reveling together with analyzing the effective causes of landslides, they have been gone under study in view of forming & developing. Meantime, the important role of man as a reinforcing stimulant of landslides and erosions should not be ignored. In this region, the faults effects can often extend 1 KM far around, so that more than 50% of landslides have been occ...
Knowledge and recognition of existence or absence and real type and amount of rare and thick tree... more Knowledge and recognition of existence or absence and real type and amount of rare and thick trees in natural stands for studying silviculture, forest management, biodiversity, etc. can be useful. Recognition of number of trees distribution in different diametric classes is necessary not only in the study of progress circumstance of forest stand but also in composing database for value tables and growing stock. Study the importance of number of trees distribution in different classes cannot be ignored in judgment quality of performed cultural operations, method selection and cultural operations appropriate to forest stands in the future. In order to evaluate SRS method for quantitative estimation of rare and thick trees, three compartments (312,313,319) of Gorazbon district in Kheyroud -Kenar, Naushahr forest were selected. SRS was employed for estimation of number & basal area per hectare in rare and thick species but full callipering methods for accurate measurement of the aboveme...
The land use / cover is not fixed but changed in the effect of different operations. Identifying ... more The land use / cover is not fixed but changed in the effect of different operations. Identifying and recognizing these changes could help managers and planners to discover the factors involved in land use and coverage changes and to have a beneficent planning to control them. This study has been carried out with the purpose of investigating the capability of Landsat ETM+ & IRS-1D imagery for forest and non-forest extent mapping and determining forest and non-forest changes in Zagros forests from 1957 to 2010 and identifying the causes of these changes as well. A case study was accomplished at the conventional territory of Jojar village in Salas County from Kermanshah province, west of Iran. The land use map related to the forest and non forest lands in 1957 were provided via photo interpretation and classifying it in the environment of Arc GIS 10 software. After investigating the radiometric and geometric quality of satellite images, together with correcting them, the area of study ...
Journal of Forestry Research, 2016
Ijair, 2014
The first step in protecting and preservating forest ecosystems is identification of genetic rese... more The first step in protecting and preservating forest ecosystems is identification of genetic reservoirs. Wild pistachio (Pistachio mutica F & M) forests are widely distributed throughout most parts of Zagros Mountain Ranges of Iran. These plants have edible fruits with extractable juice usable in pharmaceuticals, gums, paints, pesticides, pastes, perfumes and mineral oil industries. The habitats of this species in Salas babajani region, approximately with total area of 24000 ha can be observed in four open forest types including Quercus spppistacia spp, pistacia spp-Acer monpessulanum, pistacia spp-Amygdalus spp and pistacia spp. In this research, regarding the distribution area, elevation, slope and aspect characteristics of wild pistachio, different maps were provided using GIS, then were overlaid the map of distribution area of wild pistachio with maps of elevation, slope and aspect. The results obtained from statistic analysis, showed that 93.26% of habitats of wild pistachio have been located in 20-60% slope range, 85.7% are mostly distributed between 1000 and 2000 m.a.s.l and 43.9% have been located in the southwestern and northeastern aspects. The results obtained from one way variance analysis and Dunnet's T3 test; indicate significant difference between the distribution area of wild pistachio in different aspects and also different slope classes but no significant difference between the distribution areas of wild pistachio in different elevation classes.
Knowledge and recognition of existence or absence and real type and amount of rare and thick tree... more Knowledge and recognition of existence or absence and real type and amount of rare and thick trees in natural stands for studying silviculture, forest management, biodiversity, etc. can be useful. Recognition of number of trees distribution in different diametric classes is necessary not only in the study of progress circumstance of forest stand but also in composing database for value tables and growing stock. Study the importance of number of trees distribution in different classes cannot be ignored in judgment quality of performed cultural operations, method selection and cultural operations appropriate to forest stands in the future. In order to evaluate SRS method for quantitative estimation of rare and thick trees, three compartments (312,313,319) of Gorazbon district in Kheyroud-Kenar, Naushahr forest were selected. SRS was employed for estimation of number & basal area per hectare in rare and thick species but full callipering methods for accurate measurement of the abovementioned attributes. Results of this study showed that SRS method has underestimated some species such as Wild cherry (Cerasus avium), Mountain elm (Ulmus glabra Hudson), Cappadocian maple (Acer cappadocicum Gled), Large-leaved lime tree (Tilia platyphyllos Scop.) and Velvet maple (Acer velutinum) and overestimated others such as Chestnut-leaved oak (Quercus castaneifolia C.A.M.), Black alder (Alnus glutinosa (L.) Gaertn), and Common hornbeam (Carpinus betulus L.) spices. SRS method did not have an accurate estimation for number of trees distribution per hectare in diametric classes more than 100 for Chestnut-leaved oak, Common hornbeam and Velvet maple spices.
In this study, in order to develop an appropriate sampling method for inventory in uneven aged an... more In this study, in order to develop an appropriate sampling method for inventory in uneven aged and mixed forest, a systematic random sampling (SRS) along with forest cruising method was suggested in which basal area and distribution of trees number in diametric classes have no significant difference with full callipering (at 95% level). Real type and amount of rare and thick trees was also suggested to be measured. For this study three parcels (312,313,319) of GORAZBON district in Kheyrood-Kenar, NAUSHAHR-(IRAN) were selected. And In order to compare and investigate SRS along with forest cruising method, SRS method (currently used in uneven aged and mixed Forests) and full callipering (the comparison base for other methods) were selected. Results of Kolmogoroff-Smirnoff (K.S) and paired t-tests for comparing number and basal area of trees per hectare in diametric classes that obtained from full callipering and sampling methods showed that there is no significant difference (at 95% level) between mentioned factors. Calculated confidence interval includes real population mean too and in both sampling methods, sampling error was acceptable (less than 10%). The numeral values of E (square of sampling error) × T (total inventory time) were used to evaluate and 2 compare these two methods. Results of this study showed that the SRS along with forest cruising method is preferred for inventory of uneven aged and mixed forests.
Life Science Journal
The land use / cover is not fixed but changed in the effect of different operations. Identifying ... more The land use / cover is not fixed but changed in the effect of different operations. Identifying and recognizing these changes could help managers and planners to discover the factors involved in land use and coverage changes and to have a beneficent planning to control them. This study has been carried out with the purpose of investigating the capability of Landsat ETM+ & IRS-1D imagery for forest and non-forest extent mapping and determining forest and non-forest changes in Zagros forests from 1957 to 2010 and identifying the causes of these changes as well. A case study was accomplished at the conventional territory of Jojar village in Salas County from Kermanshah province, west of Iran. The land use map related to the forest and non forest lands in 1957 were provided via photo interpretation and classifying it in the environment of Arc GIS 10 software. After investigating the radiometric and geometric quality of satellite images, together with correcting them, the area of study ...
DESCRIPTION Soil is a living, dynamic and non-renewable source in lifetime which is vital for foo... more DESCRIPTION Soil is a living, dynamic and non-renewable source in lifetime which is vital for food production and the global balance of ecosystems. Every year more than 75 billion tons of soil erodes from the surface of earth. Taking care for this, appropriate methods needed to prevent erosion and sediment movement, which in its turn requires the presence of information about erosion intensity in the basin. Lack of statistical data and information on soil erosion and sediment production in Zemkan basin located in the West of Kermanshah Province, is an issue that paved the way to carry out this study with the aim of identification of erosion rate and sedimentation production and exploring sensitive areas of erosion. To achieve the above-mentioned aim, there was used the erosion potential method (EPM) using of geographical information system (GIS) to reduce errors and increase the relative accuracy in the analysis of the model. Required data in this study were prepared through field o...
آگاهي و شناخت از وجود يا فقدان و نوع و ميزان واقعي درختان نادر و قطور در تودههاي طبيعي ميتواند ... more آگاهي و شناخت از وجود يا فقدان و نوع و ميزان واقعي درختان نادر و قطور در تودههاي طبيعي ميتواند براي برنامهريزيهاي جنگلشناسي، جنگلداري، مطالعات تنوع زيستي و تنوع گونهاي و... بسيار مفيد باشد. همچنين آگاهي از پراکنش تعداد درختان در طبقات قطري مختلف نه تنها در مطالعه چگونگي پيشرفت توده جنگل لازم است، بلکه دادههاي پايه-اي براي تشکيل جداول ارزش و کيفيت توليد و موجودي تودههاي سرپا است. اهميت مطالعه نحوه پراکنش تعداد درختان در طبقات قطري مختلف را نميتوان در امر قضاوت در مورد چگونگي کيفيت عمليات پرورشي اجرا شده و انتخاب روش و عمليات پرورشي مناسب براي هر توده در آينده را ناديده گرفت. در بخش گرازبن از جنگل آموزشي- پژوهشي خیرودکنار نوشهر، براي ارزيابي روش نمونهبرداري منظم تصادفي در برآورد کمي درختان نادر و قطور، پارسلهاي 312، 313 و 319 انتخاب شدند. روش نمونهبرداري منظم تصادفي به منظور برآورد تعداد و سطح مقطع برابر سينه در هکتار گونههاي نادر و قطور و روش آماربرداري صد در صد براي بدست آوردن ميزان واقعي تعداد و سطح مقطع برابر سينه در هکتار گونههاي مذکور در منطقه مورد مطالعه اجرا شدند....
Knowledge and recognition of existence or absence and real type and amount of rare and thick tree... more Knowledge and recognition of existence or absence and real type and amount of rare and thick trees in natural stands for studying silviculture, forest management, biodiversity, etc. can be useful. Recognition of number of trees distribution in different diametric classes is necessary not only in the study of progress circumstance of forest stand but also in composing database for value tables and growing stock. Study the importance of number of trees distribution in different classes cannot be ignored in judgment quality of performed cultural operations, method selection and cultural operations appropriate to forest stands in the future. In order to evaluate SRS method for quantitative estimation of rare and thick trees, three compartments (312,313,319) of Gorazbon district in Kheyroud -Kenar, Naushahr forest were selected. SRS was employed for estimation of number & basal area per hectare in rare and thick species but full callipering methods for accurate measurement of the aboveme...
The first step in protecting and preservating forest ecosystems is identification of genetic rese... more The first step in protecting and preservating forest ecosystems is identification of genetic reservoirs. Wild pistachio (Pistachio mutica F & M) forests are widely distributed throughout most parts of Zagros Mountain Ranges of Iran. These plants have edible fruits with extractable juice usable in pharmaceuticals, gums, paints, pesticides, pastes, perfumes and mineral oil industries. The habitats of this species in Salas babajani region, approximately with total area of 24000 ha can be observed in four open forest types including Quercus spp – pistacia spp, pistacia spp- Acer monpessulanum, pistacia spp – Amygdalus spp and pistacia spp. In this research, regarding the distribution area, elevation, slope and aspect characteristics of wild pistachio, different maps were provided using GIS, then were overlaid the map of distribution area of wild pistachio with maps of elevation, slope and aspect. The results obtained from statistic analysis, showed that 93.26% of habitats of wild pistac...
3 Abstract: In this study, in order to develop an appropriate sampling method for inventory in un... more 3 Abstract: In this study, in order to develop an appropriate sampling method for inventory in un-even aged and mixed forest, a systematic random sampling (SRS) along with forest cruising method was suggested in which basal area and distribution of trees number in diametric classes have no significant difference with full callipering (at 95% level). Real type and amount of rare and thick trees was also suggested to be measured. For this study three parcels (312,313,319) of GORAZBON district in Kheyrood-Kenar, NAUSHAHR-(IRAN) were selected. And In order to compare and investigate SRS along with forest cruising method, SRS method (currently used in un-even aged and mixed Forests) and full callipering (the comparison base for other methods) were selected. Results of Kolmogoroff-Smirnoff (K.S) and paired t-tests for comparing number and basal area of trees per hectare in diametric classes that obtained from full callipering and sampling methods showed that there is no significant differ...
International Journal of Agriculture Innovations and Research, 2014
The first step in protecting and preservating forest ecosystems is identification of genetic rese... more The first step in protecting and preservating forest ecosystems is identification of genetic reservoirs. Wild pistachio (Pistachio mutica F & M) forests are widely distributed throughout most parts of Zagros Mountain Ranges of Iran. These plants have edible fruits with extractable juice usable in pharmaceuticals, gums, paints, pesticides, pastes, perfumes and mineral oil industries. The habitats of this species in Salas babajani region, approximately with total area of 24000 ha can be observed in four open forest types including Quercus spp – pistacia spp, pistacia sppAcer monpessulanum, pistacia spp – Amygdalus spp and pistacia spp. In this research, regarding the distribution area, elevation, slope and aspect characteristics of wild pistachio, different maps were provided using GIS, then were overlaid the map of distribution area of wild pistachio with maps of elevation, slope and aspect. The results obtained from statistic analysis, showed that 93.26% of habitats of wild pistachi...
Landslides or mass movements are the phenomena, occurred by geomorphologic deforming. These pheno... more Landslides or mass movements are the phenomena, occurred by geomorphologic deforming. These phenomena are some kind of destruction, which is formed in the result of reaction among inner & outer land forces. This study has been carried out with the aim of recognizing & revealing the causes of landslides, their effect on structures, their shape in the related basin area and finally providing the applied maps for environment recognition & management of this area. Having studied the geologic qualities, climate, geomorphology, slope, physiography, hydrology, soil and vegetation cover, also by field studying of the basin area and reveling together with analyzing the effective causes of landslides, they have been gone under study in view of forming & developing. Meantime, the important role of man as a reinforcing stimulant of landslides and erosions should not be ignored. In this region, the faults effects can often extend 1 KM far around, so that more than 50% of landslides have been occ...
Knowledge and recognition of existence or absence and real type and amount of rare and thick tree... more Knowledge and recognition of existence or absence and real type and amount of rare and thick trees in natural stands for studying silviculture, forest management, biodiversity, etc. can be useful. Recognition of number of trees distribution in different diametric classes is necessary not only in the study of progress circumstance of forest stand but also in composing database for value tables and growing stock. Study the importance of number of trees distribution in different classes cannot be ignored in judgment quality of performed cultural operations, method selection and cultural operations appropriate to forest stands in the future. In order to evaluate SRS method for quantitative estimation of rare and thick trees, three compartments (312,313,319) of Gorazbon district in Kheyroud -Kenar, Naushahr forest were selected. SRS was employed for estimation of number & basal area per hectare in rare and thick species but full callipering methods for accurate measurement of the aboveme...
The land use / cover is not fixed but changed in the effect of different operations. Identifying ... more The land use / cover is not fixed but changed in the effect of different operations. Identifying and recognizing these changes could help managers and planners to discover the factors involved in land use and coverage changes and to have a beneficent planning to control them. This study has been carried out with the purpose of investigating the capability of Landsat ETM+ & IRS-1D imagery for forest and non-forest extent mapping and determining forest and non-forest changes in Zagros forests from 1957 to 2010 and identifying the causes of these changes as well. A case study was accomplished at the conventional territory of Jojar village in Salas County from Kermanshah province, west of Iran. The land use map related to the forest and non forest lands in 1957 were provided via photo interpretation and classifying it in the environment of Arc GIS 10 software. After investigating the radiometric and geometric quality of satellite images, together with correcting them, the area of study ...
Journal of Forestry Research, 2016
Ijair, 2014
The first step in protecting and preservating forest ecosystems is identification of genetic rese... more The first step in protecting and preservating forest ecosystems is identification of genetic reservoirs. Wild pistachio (Pistachio mutica F & M) forests are widely distributed throughout most parts of Zagros Mountain Ranges of Iran. These plants have edible fruits with extractable juice usable in pharmaceuticals, gums, paints, pesticides, pastes, perfumes and mineral oil industries. The habitats of this species in Salas babajani region, approximately with total area of 24000 ha can be observed in four open forest types including Quercus spppistacia spp, pistacia spp-Acer monpessulanum, pistacia spp-Amygdalus spp and pistacia spp. In this research, regarding the distribution area, elevation, slope and aspect characteristics of wild pistachio, different maps were provided using GIS, then were overlaid the map of distribution area of wild pistachio with maps of elevation, slope and aspect. The results obtained from statistic analysis, showed that 93.26% of habitats of wild pistachio have been located in 20-60% slope range, 85.7% are mostly distributed between 1000 and 2000 m.a.s.l and 43.9% have been located in the southwestern and northeastern aspects. The results obtained from one way variance analysis and Dunnet's T3 test; indicate significant difference between the distribution area of wild pistachio in different aspects and also different slope classes but no significant difference between the distribution areas of wild pistachio in different elevation classes.
Knowledge and recognition of existence or absence and real type and amount of rare and thick tree... more Knowledge and recognition of existence or absence and real type and amount of rare and thick trees in natural stands for studying silviculture, forest management, biodiversity, etc. can be useful. Recognition of number of trees distribution in different diametric classes is necessary not only in the study of progress circumstance of forest stand but also in composing database for value tables and growing stock. Study the importance of number of trees distribution in different classes cannot be ignored in judgment quality of performed cultural operations, method selection and cultural operations appropriate to forest stands in the future. In order to evaluate SRS method for quantitative estimation of rare and thick trees, three compartments (312,313,319) of Gorazbon district in Kheyroud-Kenar, Naushahr forest were selected. SRS was employed for estimation of number & basal area per hectare in rare and thick species but full callipering methods for accurate measurement of the abovementioned attributes. Results of this study showed that SRS method has underestimated some species such as Wild cherry (Cerasus avium), Mountain elm (Ulmus glabra Hudson), Cappadocian maple (Acer cappadocicum Gled), Large-leaved lime tree (Tilia platyphyllos Scop.) and Velvet maple (Acer velutinum) and overestimated others such as Chestnut-leaved oak (Quercus castaneifolia C.A.M.), Black alder (Alnus glutinosa (L.) Gaertn), and Common hornbeam (Carpinus betulus L.) spices. SRS method did not have an accurate estimation for number of trees distribution per hectare in diametric classes more than 100 for Chestnut-leaved oak, Common hornbeam and Velvet maple spices.
In this study, in order to develop an appropriate sampling method for inventory in uneven aged an... more In this study, in order to develop an appropriate sampling method for inventory in uneven aged and mixed forest, a systematic random sampling (SRS) along with forest cruising method was suggested in which basal area and distribution of trees number in diametric classes have no significant difference with full callipering (at 95% level). Real type and amount of rare and thick trees was also suggested to be measured. For this study three parcels (312,313,319) of GORAZBON district in Kheyrood-Kenar, NAUSHAHR-(IRAN) were selected. And In order to compare and investigate SRS along with forest cruising method, SRS method (currently used in uneven aged and mixed Forests) and full callipering (the comparison base for other methods) were selected. Results of Kolmogoroff-Smirnoff (K.S) and paired t-tests for comparing number and basal area of trees per hectare in diametric classes that obtained from full callipering and sampling methods showed that there is no significant difference (at 95% level) between mentioned factors. Calculated confidence interval includes real population mean too and in both sampling methods, sampling error was acceptable (less than 10%). The numeral values of E (square of sampling error) × T (total inventory time) were used to evaluate and 2 compare these two methods. Results of this study showed that the SRS along with forest cruising method is preferred for inventory of uneven aged and mixed forests.
Life Science Journal
The land use / cover is not fixed but changed in the effect of different operations. Identifying ... more The land use / cover is not fixed but changed in the effect of different operations. Identifying and recognizing these changes could help managers and planners to discover the factors involved in land use and coverage changes and to have a beneficent planning to control them. This study has been carried out with the purpose of investigating the capability of Landsat ETM+ & IRS-1D imagery for forest and non-forest extent mapping and determining forest and non-forest changes in Zagros forests from 1957 to 2010 and identifying the causes of these changes as well. A case study was accomplished at the conventional territory of Jojar village in Salas County from Kermanshah province, west of Iran. The land use map related to the forest and non forest lands in 1957 were provided via photo interpretation and classifying it in the environment of Arc GIS 10 software. After investigating the radiometric and geometric quality of satellite images, together with correcting them, the area of study ...
DESCRIPTION Soil is a living, dynamic and non-renewable source in lifetime which is vital for foo... more DESCRIPTION Soil is a living, dynamic and non-renewable source in lifetime which is vital for food production and the global balance of ecosystems. Every year more than 75 billion tons of soil erodes from the surface of earth. Taking care for this, appropriate methods needed to prevent erosion and sediment movement, which in its turn requires the presence of information about erosion intensity in the basin. Lack of statistical data and information on soil erosion and sediment production in Zemkan basin located in the West of Kermanshah Province, is an issue that paved the way to carry out this study with the aim of identification of erosion rate and sedimentation production and exploring sensitive areas of erosion. To achieve the above-mentioned aim, there was used the erosion potential method (EPM) using of geographical information system (GIS) to reduce errors and increase the relative accuracy in the analysis of the model. Required data in this study were prepared through field o...
آگاهي و شناخت از وجود يا فقدان و نوع و ميزان واقعي درختان نادر و قطور در تودههاي طبيعي ميتواند ... more آگاهي و شناخت از وجود يا فقدان و نوع و ميزان واقعي درختان نادر و قطور در تودههاي طبيعي ميتواند براي برنامهريزيهاي جنگلشناسي، جنگلداري، مطالعات تنوع زيستي و تنوع گونهاي و... بسيار مفيد باشد. همچنين آگاهي از پراکنش تعداد درختان در طبقات قطري مختلف نه تنها در مطالعه چگونگي پيشرفت توده جنگل لازم است، بلکه دادههاي پايه-اي براي تشکيل جداول ارزش و کيفيت توليد و موجودي تودههاي سرپا است. اهميت مطالعه نحوه پراکنش تعداد درختان در طبقات قطري مختلف را نميتوان در امر قضاوت در مورد چگونگي کيفيت عمليات پرورشي اجرا شده و انتخاب روش و عمليات پرورشي مناسب براي هر توده در آينده را ناديده گرفت. در بخش گرازبن از جنگل آموزشي- پژوهشي خیرودکنار نوشهر، براي ارزيابي روش نمونهبرداري منظم تصادفي در برآورد کمي درختان نادر و قطور، پارسلهاي 312، 313 و 319 انتخاب شدند. روش نمونهبرداري منظم تصادفي به منظور برآورد تعداد و سطح مقطع برابر سينه در هکتار گونههاي نادر و قطور و روش آماربرداري صد در صد براي بدست آوردن ميزان واقعي تعداد و سطح مقطع برابر سينه در هکتار گونههاي مذکور در منطقه مورد مطالعه اجرا شدند....
Knowledge and recognition of existence or absence and real type and amount of rare and thick tree... more Knowledge and recognition of existence or absence and real type and amount of rare and thick trees in natural stands for studying silviculture, forest management, biodiversity, etc. can be useful. Recognition of number of trees distribution in different diametric classes is necessary not only in the study of progress circumstance of forest stand but also in composing database for value tables and growing stock. Study the importance of number of trees distribution in different classes cannot be ignored in judgment quality of performed cultural operations, method selection and cultural operations appropriate to forest stands in the future. In order to evaluate SRS method for quantitative estimation of rare and thick trees, three compartments (312,313,319) of Gorazbon district in Kheyroud -Kenar, Naushahr forest were selected. SRS was employed for estimation of number & basal area per hectare in rare and thick species but full callipering methods for accurate measurement of the aboveme...
The first step in protecting and preservating forest ecosystems is identification of genetic rese... more The first step in protecting and preservating forest ecosystems is identification of genetic reservoirs. Wild pistachio (Pistachio mutica F & M) forests are widely distributed throughout most parts of Zagros Mountain Ranges of Iran. These plants have edible fruits with extractable juice usable in pharmaceuticals, gums, paints, pesticides, pastes, perfumes and mineral oil industries. The habitats of this species in Salas babajani region, approximately with total area of 24000 ha can be observed in four open forest types including Quercus spp – pistacia spp, pistacia spp- Acer monpessulanum, pistacia spp – Amygdalus spp and pistacia spp. In this research, regarding the distribution area, elevation, slope and aspect characteristics of wild pistachio, different maps were provided using GIS, then were overlaid the map of distribution area of wild pistachio with maps of elevation, slope and aspect. The results obtained from statistic analysis, showed that 93.26% of habitats of wild pistac...