نتایج جستجو برای: reducing agricultural water resources

تعداد نتایج: 1088348  

2004
LAURENCE E. D. SMITH

Irrigation in developing countries tends to be stereotyped as equity reducing, in competition with other uses for scarce water resources, and often resulting in negative impacts for women and other disadvantaged groups. Agricultural intensification through the practice of irrigation as a strategy for poverty reduction is examined. There are four inter-related mechanisms through which irrigated ...

2016
Francesco Amigoni Andrea Castelletti Paolo Gazzotti Matteo Giuliani

The operations of water resources infrastructures, like dams and diversions, often involve multiple conflicting interests and stakeholders. Agent-based approaches have recently attracted an increasing attention to design optimal operating policies for these systems. In this paper we contribute a general monotonic concession negotiation protocol that allows the stakeholders-agents of a regulated...

Introduction: Considering the increasing population and the growing need for food and drinking water, it is essential to explore and understand the factors of crop production, especially water resources. Today, the removal of undiluted water from underground water sources has produced qualitative issues, in addition to a few shortcomings. These issues are more significant in arid and semi-arid ...

2007
L. Ma L. R. Ahuja R. W. Malone

Quantitative system approaches, provided by process‐based models of agricultural systems, are essential for optimizing the use of increasingly limited water and soil resources, guiding tactical management, and addressing the environmental concerns and global issues of the 21st century. Agricultural engineers have made significant contributions in the past to model development and applications i...

2016
Elia Scudiero Dennis L. Corwin Ray G. Anderson Todd H. Skaggs

Soil salinity undermines global agriculture by reducing crop yield and impairing soil quality. Irrigation management can help control salinity levels within the soil root-zone. To best manage water and soil resources, accurate regional-scale inventories of soil salinity are needed. The past decade has seen several successful applications of soil salinity remote sensing. Two salinity remote sens...

Journal: :تحقیقات اقتصاد و توسعه کشاورزی ایران 0
عباس بهلولوند کارشناس نهاد ریاست جمهوری سید کاظم صدر استاد دانشکدة علوم اقتصادی و سیاسی دانشگاه شهید بهشتی سید ابوالقاسم هاشمی استاد دانشکدة علوم اقتصادی و سیاسی دانشگاه شهید بهشتی

water markets are instrumental in efficient allocation and pricing of scarce water by enhancing allocative and price efficiency of water use. the prerequisites for water market formation are tradable water rights independent from ownership of the land, extensive water canals, water use associations, and adequate market regulations. mojen water market has been facilitating exchange of alternativ...

2007
Alexander Müller Josef Schmidhuber Jippe Hoogeveen Pasquale Steduto

Growing crops for bio-fuels is often criticized because of its direct competition for land for food production. The recent price increases on world food markets are partly a result of this competition. For instance, cereals prices have increased by more than 60% percent since 2005 and in 2006 sugar prices peaked on a level twice as high as the level of previous years. There are concerns whether...

زیبایی, منصور , شعبانی, محمد کاظم , هنر, تورج,

Limitations of rainfall and surface water resources farmers have to use both surface and subsurface resources for growing different crops. In this study optimal management of irrigation water allocation and cropping pattern utilizing conjunctive use of surface and subsurface water resources is studied. Also the effect of reducing water consumption in different growth stages with different irrig...

2012
Weiwei Zhang Hong Li Danfeng Sun Liandi Zhou

Understanding the effects of intensive agricultural land use activities on water resources is essential for natural resource management and environmental improvement. In this paper, multi-scale nested watersheds were delineated and the relationships between two representative water quality indexes and agricultural land use intensity were assessed and quantified for the year 2000 using multi-sc...

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