نتایج جستجو برای: arid area

تعداد نتایج: 599002  

One of the most important micro engineers of the terrestrial ecosystems, especially in the arid areas is the harvester ants due to their activity in the soil through nest building; they can make major changes while influencing the surface and subsurface in the rangeland soil. The purpose of this study was to investigate the effects of harvester ants (Messor spp.) on some soil properties in Rood...

Journal: :Journal of the Meteorological Society of Japan. Ser. II 1998

ژورنال: علوم آب و خاک 2013
انصاری, حسین, داوری, کامران, شفیعی, مجتبی, قهرمان, بیژن,

Application of conceptual hydrological models is an important issue in watersheds for researchers, especially in arid and semi-arid regions. The hydrological behaviors are complicated in such watersheds and their calibration is more difficult. In this article, the conceptual and semi-distributed SWAT model is used for a semi-arid Nishabour watershed with 9350 km2 area. Streamflow simulation is ...

Water harvesting is the collection of runoff for productivity purposes, instead of runoff being left to cause erosion. In arid and semi-arid drought-prone areas, micro-catchments are widely used as a water harvesting method to improve rangeland condition. The aim of present study was to investigate the effects of micro-catchment on ecological indices of rangeland health in Ghick-Sheikhha, Jirof...

Abdalbasit Adam Mariod Mohammed Abdelkreim, Mohammed Ibrahim Abdelsalam Nancy Ibrahim Abdalla,

Fodder trees and shrubs are crucial sources of animal feed in Sudan, particularly in arid and semi-arid areas. This is because they can fill up the feed gaps in the summer period when grassland growth is limited due to unfavorable weather conditions. The study was conducted in Elnour forest-southeastern Sudan in 2015, which is dominated by Acacia seyal. The objectives of this study were to esti...

Most of the rainfall in arid and semi-arid regions, which becomes runoff immediately after rainfall, eventually evaporates and becomes inaccessible. Harvesting water from impermeable rock surfaces and storage in reservoirs or aquifer feeding is an effective way to prevent evaporation losses in these areas. The purpose of this study is to model the amount of runoff in sub-basins with impermeable...

Journal: :به زراعی کشاورزی 0
شکیبا شاهمرادی استادیار، بخش تحقیقات ژنتیک و بانک ژن گیاهی ملی ایران، مؤسسۀ تحقیقات اصلاح و تهیۀ نهال و بذر، ، کرج- ایران مهدی زهراوی استادیار، بخش تحقیقات ژنتیک و بانک ژن گیاهی ملی ایران، مؤسسۀ تحقیقات اصلاح و تهیۀ نهال و بذر، ، کرج- ایران

to evaluate the effects of water deficit stress in barley germplasm collection of national gene bank ofiran, 25 genotypes collected from arid and semi arid provinces of iran and 3 sample cultivars werestudied in two environments including: non-stressed and water deficit stress. agronomical, phenologicaland morphological traits were measured. stress indices were calculated to determine tolerant ...

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