نتایج جستجو برای: a change in crop pattern

تعداد نتایج: 20437986  

Journal: :American Journal of Agricultural Economics 2014

Journal: :آب و خاک 0
مجید سلیمانی ننادگانی مسعود پارسی نژاد شهاب عراقی نژاد علیرضا مساح بوانی

abstract in this study, impact of climate change on net irrigation requirement (in) and yield of wheat using cgcm3 climate projection model, one of the aogcm models, in behshahr area is evaluated. changes in temperature and precipitation were simulated run under the ipcc scenario a2 for 2011-2040, 2041-2070 and 2071-2100 periods. this work was done by using statistical and proportional downscal...

Journal: :journal of agricultural science and technology 0
l. b. silvestro laboratory of functional biology and biotechnology (biolab-inbiotec-conicet-cic), national university of the center of the province of buenos aires, argentina. f. biganzoli department of quantitative methods and information systems, faculty of agronomy, university of buenos aires, argentina. h. forjn barrow-inta experimental station, tres arroyos, province of buenos aires, argentina. a. albanesi chair in microbiology and ecology, agricultural faya national university of santiago del estero, argentina. a. m. arambarri spegazzini institute, fcnym, national university of la plata, argentina. l. manso barrow-inta experimental station, tres arroyos, province of buenos aires, argentina. m. v. moreno

zero tillage practices have a direct effect on soil microbial communities modifying soil productivity and sustainability. the crop sequences used can change the aforementioned properties, too. in this study, we evaluated the effect of crop sequences under zero tillage management on soil biological and chemical properties including vertical distribution of soil organic carbon, soil basal respira...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعت آب و برق (شهید عباسپور) - دانشکده مهندسی برق و کامپیوتر 1392

abstract according to increase in electricity consumption in one hand and power systemsreliability importance in another , fault location detection techniqueshave beenrecentlytaken to consideration. an algorithm based on collected data from both transmission line endsproposed in this thesis. in order to reducecapacitance effects of transmission line, distributed parametersof transmission line...

ژورنال: علوم آب و خاک 2013
رسول اسدی, , سید محمود طباطبایی, , فرزاد حسن‌پور, , نادر کوهی, ,

Application of the modern irrigation systems such as T-Tape irrigation system is one of the ways to achieve aptimal irrigation The present study deals with the effect of surface and subsurface drip irrigation systems on the cotton yield For this purpose, a field experiment was conducted in the Agricultural and Natural Resource Research Institute of Orzoueyeh, located in the Kerman province. The...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده علوم 1376

in chapter 1, charactrizations of fragmentability, which are obtained by namioka (37), ribarska (45) and kenderov-moors (32), are given. also the connection between fragmentability and its variants and other topics in banach spaces such as analytic space, the radone-nikodym property, differentiability of convex functions, kadec renorming are discussed. in chapter 2, we use game characterization...

پایان نامه :0 1374

the rationale behind the present study is that particular learning strategies produce more effective results when applied together. the present study tried to investigate the efficiency of the semantic-context strategy alone with a technique called, keyword method. to clarify the point, the current study seeked to find answer to the following question: are the keyword and semantic-context metho...

Journal: :molecular biology research communications 2014
ali niazi amin ramezani ali dinari

most plants encounter stress such as drought and salinity that adversely affect growth, development and crop productivity. the expression of the gene glutathione-s-transferases (gst) extends throughout various protective mechanisms in plants and allows them to adapt to unfavorable environmental conditions. gstf1 (the first phi gstfs class) gene expression patterns in the wheat cultivars mahuti ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده ریاضی 1390

the main objective in sampling is to select a sample from a population in order to estimate some unknown population parameter, usually a total or a mean of some interesting variable. a simple way to take a sample of size n is to let all the possible samples have the same probability of being selected. this is called simple random sampling and then all units have the same probability of being ch...

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