نتایج جستجو برای: drought indices

تعداد نتایج: 112757  

Journal: :پژوهش های حبوبات ایران 0
خسرو مفاخری محمدرضا بی همتا علیرضا عباسی

introduction drought stress is one of the most important abiotic stresses all around the world. the aim of breeding studies and breeding for resistance to drought is that breeders seek to identify varieties and genetic resources to drought resistant and comparison of drought resistance among the varieties and the introduction of superior varieties to farmers. drought or imbalance between supply...

Introduction Drought is one of the environmental disasters that is very frequent in arid and semi-arid regions of the country. Rainfall defects have different effects on groundwater, soil moisture, and river flow. Meteorological drought indices are calculated directly from meteorological data such as rainfall and will not be useful in monitoring drought if the data are missing. Therefore remot...

Journal: Desert 2013
M. Sarajian R. Zarei S. Bazgeer

Drought is a major environmental disaster in many parts of the world. Knowledge about the timing, severity and extentof drought can aid planning and decision-making. Drought indices derived from in-situ meteorological data have coarsespatial and temporal resolutions, thus, obtaining a real-time drought condition over a large area is difficult. This studyused advanced very high resolution radiom...

Hooman Razi, Massumeh Aliakbari Seyed Abdolreza Kazemeini

Drought is the most significant constraint for crop production in arid and semi-arid regions. In order to assess drought tolerance in fifteen rapeseed (Brassica napus) cultivars using yield-based drought tolerance indices, two experiments were conducted at the research station of College of Agriculture, Shiraz University, Shiraz, Iran during 2009-2010 growing season. The cultivars were...

ژورنال: علوم آب و خاک 2019

Droughts are natural events and could lead to declining surface water quality of regional basin. Understanding the complex impacts of drought may help authorities to monitor changes in different regional basin and to make appropriate decision on development of a river basin management plan. In this study 20 years annual precipitation time series from 1994-2013 from 7 synoptic weather stations l...

باقی‌زاده, امین, محمدی‌نژاد, قاسم, ملاحیدری بافقی, ربابه,

Increasing the yield of wheat (Triticum aestivum) requires choosing resistant and compatible cultivars to different climatic conditions. In order to study the effects of salinity and drought stress on grain yield,  Study of stress tolerance indices and identification of tolerant genotypes to salt and drought stress, 20 different Wheat (Triticum aestivum) genotypes were assessed in a Randomized ...

2011
Moaed Almeselmani

Tolerant and susceptible durum wheat varieties were grown in the 1 and 2 settlement zone under rainfed conditions inDaraa province-Syria, In order to expose plants to different level of water regime, since the two zones differ in total amount of rainfall during the growing season. Plants were suffered from terminal drought stress in both zones, however, the drought was more sever in the 2 settl...

Journal: :علوم گیاهان زراعی ایران 0
علی وند کریمی کارشناس ارشد اصلاح نباتات، دانشکدة کشاورزی دانشگاه آزاد، واحد علوم و تحقیقات تهران معصومه پوراسماعیل استادیار، مؤسسه تحقیقات اصلاح و تهیه نهال و بذر شاهین واعظی استادیار، مؤسسة تحقیقات اصلاح و تهیة نهال و بذر آسا ابراهیمی استادیار دانشکدة کشاورزی دانشگاه آزاد، واحد علوم و تحقیقات تهران

in order to evaluate drought tolerance of chickpea genotypes and identifying the best indices of drought tolerance, the 20 genotypes desi chickpea plus two improved cultivars (kaka and piroz) were tested using a randomized complete block design under two irrigated (non stress) and (stress) conditions. quantitive drought tolerance and susceptibility indices such as stress tolerance index (sti), ...

Journal: :تحقیقات جغرافیایی 0
محمد فرامرزی دانشگاه ملایر حمید نوری دانشگاه ملایر

raisins are one of the most important parts of agriculture products to export and malayer gardens are one of the most valuables lands to produce vitis vinifera for raisin industry in recent years. the region has some problems to mange water resources due to climate change effects and drought. understanding of hydrology balance and drought period is one of most tools to manage the water crisis i...

2016
Tsegaye Tadesse Donald A. Wilhite Michael J. Hayes Steve Goddard TSEGAYE TADESSE DONALD A. WILHITE MICHAEL J. HAYES SHERRI K. HARMS STEVE GODDARD

Drought is a complex natural hazard that is best characterized by multiple climatological and hydrological parameters. Improving our understanding of the relationships between these parameters is necessary to reduce the impacts of drought. Data mining is a recently developed technique that can be used to interact with large databases and assist in the discovery of associations between drought a...

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