نتایج جستجو برای: degraded rangelands

تعداد نتایج: 29078  

2013
M. Reyahi Khoram

Land use planning means managing our land and resources and it focuses on the functions of ecosystems. The main purpose of this study is to determine the places and sites with necessary capabilities for ecotourism, environmental conservation, agricultural activities, range management, forestry, afforestation, aquaculture, city planning and industrial development in the studied area. This resear...

Journal: :علوم و تکنولوژی پلیمر 0
محمود مهرداد شکریه وحید نصیر

a new model is proposed in this research to calculate the longitudinal strengthof unidirectional e-glass reinforced polymer composites exposed to sulfuricacid environment, using a micromechanics model. in the proposed method,it is assumed that the residual strength of the degraded composites under acidic environment can be calculated by knowing the degraded strength properties of the constituen...

Journal: :Journal of Range Management 1978

Journal: :مرتع و آبخیزداری 0
فاضل امیری استادیار دانشکده مهندسی گروه منابع طبیعی، دانشگاه آزاد اسلامی واحد بوشهر، ایران. حسین ارزانی استاد دانشکده منابع طبیعی، دانشگاه تهران، ایران ابراهیم گویلی فارغ التحصیل کارشناسی ارشد دانشکده منابع طبیعی، دانشگاه صنعتی اصفهان، ایران.

existence of pollen and nectar plants in vegetation composition of natural environment is essential for apiculture as one of the utilization types in multiple uses of environmental resources. therefore, development of this strategy based on indigenous knowledge will increase stakeholder income, which can decrease stocking rate based on range grazing capacity. due to high dependence of bee to pl...

Journal: :محیط شناسی 0
محمدرضا طاطیان دانشکده علوم مرتع دانشگاه علوم کشاورزی و منابع طبیعی ساری، استادیار علیرضا ذبیحی کارشناس ارشد مرتع داری دانشگاه علوم کشاورزی و منابع طبیعی ساری

with regard to the mutual relations between plant and soil as the main component of rangeland ecosystems, this research has been identified the indicator species in environmental conditions of dry regions as the most important tools in ecological management of these ecosystems. therefore the steppe and dry rangelands of kooh - e- namak in qom province was selected. sampling was done by plot in ...

Journal: :Agriculture 2021

Reliable measures of biomass, species composition, nitrogen status, and nutritive value provide important indicators the status pastures rangelands, allowing managers to make informed decisions. Traditional methods sample collection necessitate significant investments in time labor. Proximal sensing technologies have potential collect more data with a smaller investment However, protocols for c...

Journal: :Journal of Range Management 1974

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