نتایج جستجو برای: based methods capabilities in wheat yield predication in wheat fields

تعداد نتایج: 17716275  

Journal: :Genetics and molecular research : GMR 2014
Z K Li X L Jiang T Peng C L Shi S X Han B Tian Z L Zhu J C Tian

Biomass yield is one of the most important traits for wheat (Triticum aestivum L.)-breeding programs. Increasing the yield of the aerial parts of wheat varieties will be an integral component of future wheat improvement; however, little is known regarding the genetic control of aerial part yield. A doubled haploid population, comprising 168 lines derived from a cross between two winter wheat cu...

2016
Xiang-Shun Hu Ying-Jie Liu Yu-Han Wang Zhe Wang Xin-lin Yu Bo Wang Gai-Sheng Zhang Xiao-Feng Liu Zu-Qing Hu Hui-Yan Zhao Tong-Xian Liu

The English grain aphid, Sitobion avenae, is a major pest species of wheat crops; however, certain varieties may have stronger resistance to infestation than others. Here, we investigated 3 classical resistance mechanisms (antixenosis, antibiosis, and tolerance) by 14 wheat varieties/lines to S. avenae under laboratory and field conditions. Under laboratory conditions, alatae given the choice b...

G.D. Wang K.Q. Zhou M. Hashemi S.J. Herbert X.B. Liu, Y.H. Li

Wheat (Triticum aestivum L.) variety mixtures represent a relatively unexplored avenue for maintaining yield and improving flour quality. A field experiment was conducted to examine the responses of three spring wheat varieties in pure variety and in variety mixtures under continuous cropping in Northeast China. Three modern spring wheat varieties, along with a three-variety mixture and a t...

امام, یحیی, شهراسبی, صادق , عدالت, محسن , کاظمینی , سید عبدالرضا,

Cultivation of winter cover crops such as wheat and barley is one of the practical approaches for weeds control in cereal-based rotations. In order to investigate the effect of cover crop species and nitrogen rates on weed control of rapeseed (Brassica napus L.), a field experiment was arranged in split-plot based on a RCBD with three replications during 2013-2014 growing season at Research Fie...

Journal: :آب و خاک 0
نرگس صالح نیا محمدعلی فلاحی

abstract in order to evaluation the effects of price policies (wheat guarantee price in each period and its price lag), environmental (planted area) and climatic (min and max average temperature, total annual precipitation, cold-day degree and hot-day degree) factors, we considered wheat yield in razavi-khorasan province (9 cities) for a 13-year statistical period (1371-72 to 1383-84). in this ...

2016
E. Byamukama S. N. Wegulo S. Tatineni G. L. Hein R. A. Graybosch

Byamukama, E., Wegulo, S. N., Tatineni, S., Hein, G. L., Graybosch, R. A., Baenziger, P. S., and French, R. 2014. Quantification of yield loss caused by Triticum mosaic virus and Wheat streak mosaic virus in winter wheat under field conditions. Plant Dis. 98:127-133. Triticum mosaic virus (TriMV) and Wheat streak mosaic virus (WSMV) infect winter wheat (Triticum aestivum) in the Great Plains re...

Journal: :Global change biology 2015
John M A Duncan Jadunandan Dash Peter M Atkinson

Remote sensing-derived wheat crop yield-climate models were developed to highlight the impact of temperature variation during thermo-sensitive periods (anthesis and grain-filling; TSP) of wheat crop development. Specific questions addressed are: can the impact of temperature variation occurring during the TSP on wheat crop yield be detected using remote sensing data and what is the impact? Do c...

اسلام مجیدی هروان داوود افیونی رضا بزرگی‌پور عبدالرئوف پاکدل عظیم اکبری فرشاد بختیار مجتبی وهاب‌زاده, محمد شریف الحسینی محمدتقی طباطبایی هدایت حاج آخوند میبدی

 Wheat is the first among cultivated crops in terms of hectare in Iran, and is cultivated on 6.2 million hectares under variable agro-climatic conditions. Of 2.2millions hectares of wheat crop grown under irrigation system, about 30% of the areas experience the adverse effects of salinity stress, which is one of the limiting factors of wheat production in warm and temperate regions of Iran. Sel...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان 1390

during natural gas processing, water in natural gas may cause to hydrates formation in pipelines which may lead to serious damages to process equipments. given the problems raised by present of water in natural gas, glycol solvent uses to remove water.in contact of glycol with gas always an amount of btex and voc absorb along with water, which on glycol recovery process, these substances separa...

Journal: :محیط شناسی 0
تورج نصرآبادی استادیار گروه برنامه ریزی، مدیریت و آموزش محیط زیست، دانشکدۀ محیط زیست دانشگاه تهران الهام عرب کارشناس ارشد برنامه ریزی و مدیریت محیط زیست، دانشکدۀ محیط زیست دانشگاه تهران فرزام پوراصغر سنگاچین دکترای برنامه ریزی و مدیریت محیط زیست، دانشکدۀ محیط زیست دانشگاه تهران

introduction the average annual precipitation in iran is about 250 mm that is not regularly distributed spatially and temporally. more than 70 percent of total precipitation is not accessible due to evapotranspiration. total renewable water resources of the country are estimated to be around 130 billion cubic meters. in spite of limitation in water resources, they are not used properly. agricul...

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