نتایج جستجو برای: irrigation strategies

تعداد نتایج: 429673  

Journal: :آب و خاک 0
علیرضا کیانی افشین مساوات

introduction: lack of water and deterioration in the quality of soil and water resources are considered to be the prime cause of reduced crop yield in arid and semi-arid regions ‘more crop per drop’ by trickle irrigation, deficit irrigation, and uncommon water are the best strategies for mitigating water crises. different irrigation management strategies are needed to increase production in dif...

2013
J. O. Payero David Tarkalson Suat Irmak Don Davison James L. Petersen S. Irmak D. Davison

Water regulations have decreased irrigation water supplies in Nebraska and some other areas of the USA Great Plains. When available water is not enough to meet crop water requirements during the entire growing cycle, it becomes critical to know the proper irrigation timing that would maximize yields and profits. This study evaluated the effect of timing of a deficit-irrigation allocation (150 m...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده علوم انسانی 1385

the present study was carried on to investigate the use of face-keeping strategies in reaction to complaints by male and female in two different cultures, persian and american english. to see if apology strategies are affected by cultural, contextual preferences and gender of interlocutors in two distinct languages of persian and american english. the hypotheses to be tested were 1) ifids, acce...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده ادبیات و زبانهای خارجی 1390

the aim of this study was to identify the problems of translating markedness structures from english to persian in order to look closely at what possible difficulties translators may face. it also seeks to probe the strategies applied accordingly by iranian translators in translating them. from three translation of blindness novel, the sentences with marked structures were elicited and also the...

2009
Andrew J. Hamilton Frank Stagnitti Xianzhe Xiong Simone L. Kreidl Kurt K. Benke

As competition among industrial, agricultural, urban and environmental sectors for freshwater intensifies, wastewater is frequently being seen as a valuable resource rather than mere waste. Furthermore, wise reuse of this water alleviates environmental concerns attendant with its discharge to coastal environments and inland waterways. Globally, around 20 million ha of land are irrigated with wa...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس 1378

تحقیق حاضر کوششی بود در جهت (الف) مشخص نمودن استراتژیهایی که دانشجویان و دانش آموزان ایرانی برای یادگیری زبان انگلیسی بطور عام و یادگیری واژگان بطور خاص مورد استفاده قرار می دهند، (ب) پیدا کردن ارتباط معنادار مابین استراتژیهای یادگیری زبان انگلیسی و واژگان انگلیسی از یک طرف و سطح توانایی زبانی فراگیران از طرف دیگر. (ج) پی بردن به تغییرات معناداری که بواسطه سن، جنس ، قومیت ، سالهای یادگیری زبان ...

Journal: :CoRR 2016
Ying Huang Pavel Janovsky Sanjoy Das Stephen M. Welch Scott A. DeLoach

Groundwater is one of the most vital of all common pool resources throughout the world. More than half of groundwater is used to grow crops. This research models groundwater depletion patterns within a multiagent system framework. Irrigators are modeled as agents in the multi-agent system. The irrigation strategies adopted by the agents are investigated using game theory, under several futurist...

Journal: :آب و خاک 0
امیر اعظمی کیومرث زرافشانی حسین دهقانی سانیج علی گرجی

abstract one of the technologies that deal with efficient use of water is sprinkler irrigation systems. if farmers are to continue the use of sprinkler systems which may be crucial in agricultural development, educational programs should be tailored to their needs. therefore, the main purpose of this study was to analyze educational needs of farmers equipped with sprinkler irrigation. furthermo...

2007
Niels Schütze Gerd H. Schmitz

The great challenge of the agricultural sector is to produce more food and/or more revenue from less water, which can be achieved by optimal irrigation management. A task of primary importance is the problem of intraseasonal irrigation scheduling under limited seasonal water supply. On the intraseasonal level, a limited amount of water is to be distributed over a number of irrigations, taking i...

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