in order to study and determine the most effective traits, drought tolerance indices and identify tolerant genotypes in terminal drought stress on the cowpea, an experiment was carried out based on an augment design in two separate conditions in the karaj farm, faculty of agriculture, tehran university in 2009. drought stress was imposed by cutting irrigation after flowering against normal irri...

To study drought stress on seedling dry weight, proline contents and evaluate of antioxidant enzymes activity in canola genotypes (Brassica napus l.), an experiment were evaluated at laboratory physiology, Shahed University. This experiment was carried out in factorial with CRD design with 4 replications in 2008. The first factor was including levels of dough stress, one without stress as check...

Abstract With respect to the necessity of comprehensive studies on drought and also high damages that caused by drought, this research studied meteorological hydrological droughts. In study, Lighvan, Navroud Seqez basins with different climates were selected. We used monthly data stream flow, precipitation evaporation from 1992 2016 for study phenomena. The aim at is analyze SPI SPEI determinat...

Current methods for climate change assessment ignore the significant differences in uncertainty model projections of two key constituents drought, precipitation, and evapotranspiration. We present here a new basis assessing future drought using simulations that addresses this limitation. The method estimates Standardized Precipitation Evapotranspiration Index (SPEI) two-stage process. first sta...

Rainfall, soil moisture, increasing temperature and changes in vegetation cover are the most important parameters effecting drought. Therefore, analysis of vegetation fraction and soil spectral signature, especially in red and infra red bands, are essential in drought estimation using remote sensing. In this study, Modified Perpendicular Drought Index (MPDI), which uses Vegetation Fraction (VF)...

Drought is a wide-spread problem seriously influencing durum wheat (Triticum durum Desf.) production and quality, but development of resistant cultivars is hampered by the lack of effective selection criteria. The objective of this study was to evaluate the ability of several selection indices to identify drought resistance cultivars under a variety of environmental conditions. Twenty four duru...

the objective of this study is to develop a novel methodology integrating remote sensing, geographic information system technology and local spatial autocorrelation geo-computation for quick drought assessment. one group of drought indices, based on the condition of the vegetation, includes the normalized difference vegetation index (ndvi), anomaly of normalized difference vegetation index (ndv...

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...

in order to evaluate terminal drought tolerance in different canola cultivars based on drought tolerance indices, an experiment was conducted based on randomized complete block design (rcbd) with three replications at experimental field of seed and plant improvement institute (spii), karaj in 2008-09. results using stress tolerance index (sti), geometric mean productivity (gmp) and mean product...