نتایج جستجو برای: net irrigation requirement

تعداد نتایج: 304022  

2008
Consuelo C. Romero Michael D. Dukes Guillermo A. Baigorria Ron Cohen

Florida ranks first in citrus production, with nearly 68% of all U.S. citrus growing in the season 2005–2006. Most of the citrus groves are located from central to south Florida, and agricultural irrigation permitting is regulated by three of Florida’s five water management districts. Most of the permitting for citrus production in Highlands, Polk and Hillsborough counties is conducted by the S...

2005
Guilherme F. Marques Jay R. Lund Richard E. Howitt

[1] Farmers make joint water and land use decisions for economic purposes based in part on water availability and reliability. A two-stage economic production model is developed to examine the effects of hydrologic uncertainty and water prices on agricultural production, cropping patterns, and water and irrigation technology use. The model maximizes net expected farm profit from permanent and a...

2014
Rajni Sharma

Agriculture is an economic activity that manifests the complex relationship between natural and human resources. The growth of agriculture is prerequisite for overall development of Indian economy. It contributes significantly to the export earnings and affects the performance of other sectors of the economy through forward and backward linkages. The present paper analysis disparities in agricu...

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...

2010
Josiah Adeyemo Faizal Bux Fred Otieno

Single objective optimization for maximizing total net benefit from farming is presented in this study. Differential evolution algorithm which is a family of evolutionary algorithm for fast optimization is employed for the model. The single objective optimization is used to find a better solution using the results of multi-objective optimization of crop planning where three objectives are consi...

Journal: :journal of agricultural science and technology 2015
a. rahman

pressurized irrigation technologies of course have the potential to raise the productivity of land and water; but, these technologies could not popularize among the smallholders who own millions of farms worldwide. in developing pressurized irrigation technologies, particularly for field crops irrigation, researchers and manufacturers have developed more specialized and expensive technologies w...

ژورنال: علوم آب و خاک 2012
محمد اسماعیل اسدی, , پریسا شاهین رخسار, ,

Modification of irrigation scheduling and management improvement of irrigation systems are two essential factors that have significant impact on agricultural water use efficiency. Therefore, a field experiment was conducted to evaluate the effect of tape drip irrigation (T) and furrow irrigation systems (S) under different irrigation regimes on yield and yield components of soybean in growing s...

2013
Rahim Khan Ihsan Ali M. Asif Suryani Mushtaq Ahmad Muhammad Zakarya Abdul Wali Khan

Irrigation procedures are based on farmer’s experience, soil properties and environmental conditions that are affected by changes in environmental conditions. Wireless sensor network is a solution for monitoring environmental conditions and efficient utilization of water. In this paper, an effective irrigation management system is presented for the container grown crops. It utilizes wireless se...

2014
Amthal K. Mousa Muayad S. Croock Mohammed N. Abdullah Muhammad Umair R. Usman Xiaohong Peng Guodong Liu Peng Xiaohong Mo Zhi Xiao Laisheng Guohuan Lou XiuLi Zeng Ketema Tilahun Zeleke

In this paper, an efficient irrigation system is proposed based on computing evapotranspiration (ET) and the required irrigation quantity using fuzzy inference methodology. The aim of this system is to schedule irrigation according to the particular requirements of a crop and to the change in various climatological parameters and other factors. This is to avoid overor under-watering which signi...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2007
Céline Bonfils David Lobell

Understanding the influence of past land use changes on climate is needed to improve regional projections of future climate change and inform debates about the tradeoffs associated with land use decisions. The effects of rapid expansion of irrigated area in the 20th century has remained unclear relative to other land use changes, such as urbanization, that affected a similar total land area. Us...

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