نتایج جستجو برای: irrigation efficiencies

تعداد نتایج: 62083  

Journal: :journal of agricultural science and technology 2014
h. ebrahimian e. playan

high efficiency and uniformity of water and fertilizer application are usually, considered as the ultimate goals of an appropriate design and management of irrigation and fertigation systems. the objective followed in this paper was to present a simulation-optimization model for alternate vs. conventional furrow fertigation. two simulation models (surface fertigation and swms-2d models) along w...

ژورنال: علوم آب و خاک 2008
رضائی, عبدالمجید , یوسفی‌آذر, معصومه ,

To improve a complex character such as yield with low heritability, the use of indirect selection through other characters and a selection index based on different effective traits is recommended. This study was conducted to evaluate different selection methods by using 23 F2:4 wheat lines derived from the cross of Virmarin (susceptible cultivar) and Sardari (tolerant cultivar) at Research Farm...

رضائی, عبدالمجید , یوسفی‌آذر, معصومه ,

To improve a complex character such as yield with low heritability, the use of indirect selection through other characters and a selection index based on different effective traits is recommended. This study was conducted to evaluate different selection methods by using 23 F2:4 wheat lines derived from the cross of Virmarin (susceptible cultivar) and Sardari (tolerant cultivar) at Research Farm...

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...

1999
Theib Oweis Mustafa Pala John Ryan

In the Mediterranean zone, efforts to optimize combinations of supplemental irrigation (SI ), improved varieties, nitrogen (N ) and sowing dates aim to improve and stabilize cereal yields and maintain quality, especially for durum wheat. Thus, a 4 year field study (1992/1993 to 1995/1996) on a deep clay soil in northern Syria assessed the impact of SI (rain-fed, 1/3, 2/3 and full SI ) combined ...

2008
K. P. Gore R. K. Panda

In order to consider the importance of efficient and judicious use of available resources, a case study was undertaken to allocate the land under selected crops in command area of Aundha Minor irrigation project, of Maharashtra State, India so as to maximize the net benefit and production. A linear programming allocation model was formulated by considering the four objectives viz. (i) the maxim...

Journal: :چغندرقند 0
لادن شفیعی هیات علمی مرکز تحقیقات کشاورزی و منابع طبیعی کرمان

in order to study the effective factors in sugar beet production, evaluation of technical, allocative and economical efficiency of sugar beet producers in bardsir city, 150 sugar beet producers were questioned by classified method. data were collected through questionnaire forms filled by producers in 2004-05. the stochastic frontier production and cost function method were used to analyze the ...

Journal: :International Journal of Enviornment and Climate Change 2022

Technological innovations will leads to meet the present and future challenges of agriculture sector. Water is one important natural resource, since time immemorial, also acted as catalyst during Green Revolution helped India achieve self-sufficient status in food grain production. Fresh water only 2.6% total resources world has be utilized efficiently. Inspite coverage under irrigation phenome...

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