نتایج جستجو برای: water productivity

تعداد نتایج: 626905  

2013
Ulrike Bechtold Waleed S. Albihlal Tracy Lawson Michael J. Fryer Penelope A.C. Sparrow François Richard Ramona Persad Laura Bowden Richard Hickman Cathie Martin Jim L. Beynon Vicky Buchanan-Wollaston Neil R. Baker James I.L. Morison Friedrich Schöffl Sascha Ott Philip M. Mullineaux

Heat-stressed crops suffer dehydration, depressed growth, and a consequent decline in water productivity, which is the yield of harvestable product as a function of lifetime water consumption and is a trait associated with plant growth and development. Heat shock transcription factor (HSF) genes have been implicated not only in thermotolerance but also in plant growth and development, and there...

2010
Robert M. Hubbard Jose Stape Michael G. Ryan Auro C. Almeida Juan Rojas

Eucalyptus plantations occupy almost 20 million ha worldwide and exceed 3.7 million ha in Brazil alone. Improved genetics and silviculture have led to as much as a three-fold increase in productivity in Eucalyptus plantations in Brazil and the large land area occupied by these highly productive ecosystems raises concern over their effect on local water supplies. As part of the Brazil Potential ...

Journal: :بوم شناسی کشاورزی 0
کوروش مجد سلیمی ابراهیم امیری شهرزاد شایگان

water productivity index is one of the main factors in efficient use of water for agricultural products. in this study, the rate of water productivity (wp) in six irrigated tea fields and three rainfed (no irrigation) were assessed by farmer’s management for two years (2009-2010). yield of each tea field in successive harvests, soil moisture monitoring by gravimetric soil and use of water balan...

Journal: :پژوهش های تولید گیاهی 0
مریم صارمی کارشناس ارشد پردیس کشاورزی و منابع طبیعی دانشگاه رازی کرمانشاه بهمن فرهادی استادیار گروه مهندسی آب، پردیس کشاورزی و منابع طبیعی دانشگاه رازی کرمانشاه عباس ملکی استادیار گروه مهندسی آب، دانشکده کشاورزی دانشگاه لرستان معصومه فراستی استادیار گروه مهندسی آب، پردیس کشاورزی و منابع طبیعی دانشگاه رازی کرمانشاه

background and objectives: although more than 90 percent of consumed water used in agricultural sector, water is the major limiting factor for agricultural development in iran. over the past few years increasing agricultural crop water productivity thorough deficit irrigation methods has been studied by agricultural researchers and planners. although lorestan province is one of the major produc...

Journal: :چغندرقند 0
فردین بوستانی استادیار دانشگاه آزاد اسلامی مرودشت حمید محمدی استادیار دانشگاه آزاد اسلامی جهرم

in this paper, productivity of and demand for water throughout eqlid’s sugar beet growers in 1385 were investigated. to address the objective 100 growers were selected using two-stage cluster sampling, then required dataset was obtained by interviewing and completing questionnaire. in order to study factors affecting sugar beet production, cobb-douglas production function was applied. based on ...

2005
Barbara van Koppen Constantina Safilios-Rothschild

/ irrigation / poverty / water management / investments / water development / productivity / cropping systems / gender / labor / economic growth / land productivity / Africa South of Sahara / IWMI receives its principal funding from 58 governments, private foundations and international and regional organizations known as the Consultative Group on International Agricultural Research (CGIAR). Sup...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده علوم تربیتی و روانشناسی 1388

on- the-job training on of the most effective tools for managers to cope with the changing organizational environment. it grantess suitable services to customers, particularly in public service enterprises. if such training os goal oriented, planned systematically, and tailored to the employees, job content, then not only it could increase employees and organizational performance, but also it c...

Journal: :محیط زیست طبیعی 0
حمید سرخیل استادیار، گروه مهندسی محیط زیست، دانشگاه محیط زیست، ایران مهیار حبیبی راد دانشجوی کارشناسی ارشد، مهندسی عمران ـ محیط زیست، دانشگاه محیط زیست، ایران نعمت الله خراسانی استاد، گروه محیط زیست، دانشگاه تهران، ایران

the input-oriented data envelopment analysis was used to measure the water use efficiency and productivity indices of tehran over the period 2005-13. meanwhile, the correlation between water uses and regional economic activities was examined using the gross regional domestic product index. the results indicated that the total productivity was improved 1.8% and 1.68% aspect of technical efficien...

2017
Jian Zeng Min Chen Minfang Zheng Wangjiang Hu Yusheng Qiu

The western Arctic Shelf has long been considered as an important sink of nitrogen because high primary productivity of the shelf water fuels active denitrification within the sediments, which has been recognized to account for all the nitrogen (N) removal of the Pacific water inflow. However, potentially high denitrifying activity was discovered within the oxygenated Chukchi Shelf water during...

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