نتایج جستجو برای: irrigation management

تعداد نتایج: 888418  

Journal: :آب و خاک 0
رمضانی اعتدالی رمضانی اعتدالی نظری نظری توکلی توکلی پارسی نژاد پارسی نژاد

abstract: deficit irrigation technique can be used for produce more yield for every unit of irrigation water, and cause to increase crop economical benefit. main purpose of deficit irrigation is high water use efficiency with decreasing in irrigation sufficiency. in this research potential of cropwat model in deficit irrigation management for two crops, wheat and barley in karaj climate was stu...

2014
T. Subramani S. Badrinarayanan K. Prasath S. Sridhar

Evaluation of any irrigation project involves the assessment of area, improved by the project. Irrigated agriculture will play a major role in determining the future food security of most Asian countries, and it will also be the major contributor to the additional food production required as world population expands. Therefore, it is important to raise the agricultural performance of low produc...

2015
Bin Guo Weihong Li Jinyun Guo Chuanfa Chen

Irrigation water demand accounts for more than 95% of the total water use in the Kaidu-kongqi River Basin. Determination of the spatial and temporal trends in irrigation water demand is important for making sustainable and wise water management strategies in this highly water deficit region. In this study, the spatial and temporal trends in irrigation water demand as well as net crop irrigation...

2010
A. Montazar

The great challenge of the agricultural sector is to produce more crop from less water, which can be achieved by increasing crop water productivity. The modernization of the irrigation systems offers a number of possibilities to expand the economic productivity of water and improve the virtual water status. The objective of the present study is to assess the global water productivity (GWP) with...

2001
MAGALLY QUIROS-GONZALEZ

In the north-western region of Venezuela, Phyllocoptruta oleivora, Tetranychus mexicanus and Brevipalpus phoenicis are common plant-feeding mites on leaves, fruits and branches of Tahiti lime, Citrus latifolia. The population dynamics of these herbivores are affected by many factors, such as weekly treatments with wettable sulphur, particularly during the wet season, maintenance pruning of plan...

Journal: :Mathematical and Computer Modelling 2011
Ying Ma Shaoyuan Feng Zailin Huo Xianfang Song

The evaluation of the field water cycle under deficit irrigation plays an important role in studying mechanism of field water dynamics, optimization of agricultural water management strategies, and assessment of regional water resources. In this study, the agro-hydrological Soil–Water–Atmosphere–Plant (SWAP) model was used to evaluate the field water cycle for a winter wheat-summer corn double ...

2017
Panpan Zhang Geng Ma Chenyang Wang Hongfang Lu Shasha Li Yingxin Xie Dongyun Ma Yunji Zhu Tiancai Guo

Water management and nitrogen application are critical factors in wheat grain yield and protein quality. This study aimed to evaluate the effect of irrigation and nitrogen application on the grain yield, protein content and amino acid composition of winter wheat. Field experiments were conducted in a split-plot design with three replications in high-yielding land on the North China Plain in 201...

Journal: :تحقیقات آب و خاک ایران 0
علی حیدر نصرالهی دانشگاه لرستان- استادیار گروه مهندسی آب دانشکده کشاورزی و منابع طبیعی سعید برومند نسب دانشگاه شهید چمران عبدالرحیم هوشمند دانشگاه شهید چمران مولود حیدری نیا دانشگاه شهید چمران اهواز

irrigation with saline water needs to the different managements to reduce the harmful effects of salinity on plants, soil and the environment. simulation models are the useful tool to irrigation management in conditions of soil and water salinity because, they can predict crop yield and soil conditions considering to different climate, plant and management practices. in this study, the saltmed ...

Journal: :international journal of agricultural management and development 2015
morteza tahamipour mohammad kavoosi kalashami amirhossein chizari

pricing policies play an important role in water demand management and its optimal allocation. determining proper water price leads to optimal allocation of water especially in agricultural consumptions. applying new subsidy targeting law in iran which insists on pricing water based on its supply cost, will effects considerably on water resource management in agriculture sector. so, in this stu...

Journal: :مدیریت آب و آبیاری 0
عبدالصمد کاغذلو دانشجوی کارشناسی ارشد گروه مهندسی آبیاری و زهکشی، دانشگاه بین المللی امام خمینی(ره)، قزوین عباس ستوده نیا دانشیار دانشگاه بین المللی امام خمینی(ره)، قزوین پیمان دانش کار آراسته دانشیار دانشگاه بین المللی امام خمینی(ره)، قزوین

evaluating the performance of irrigation systems by providing the possibility of increasing irrigation efficiency in those systems is an important factor in the field of water resources management. in this study, the performance of three systems were evaluated, including linear move sprinkler irrigation systems in maize, sugar beet and alfalfa fields of magsal agro-industrial company which is l...

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