نتایج جستجو برای: irrigated farming

تعداد نتایج: 33931  

Journal: :Soil Research 2022

Context Many regions in the world have undergone rapid land use change and intensification of agricultural land, such as through irrigation expansion, upgrading systems, changing grassland, stock, nutrient management practices. With more intensive use, changes to soil properties can occur, compaction water storage. The effects modern sprinkler-irrigated pastoral farming on physical are not well...

Journal: :Remote Sensing 2009
Prasad S. Thenkabail Venkateswarlu Dheeravath Chandrashekhar M. Biradar Obi Reddy P. Gangalakunta Praveen Noojipady Chandrakantha Gurappa Manohar Velpuri Muralikrishna Gumma Yuanjie Li

The goal of this research was to compare the remote-sensing derived irrigated areas with census-derived statistics reported in the national system. India, which has nearly 30% of global annualized irrigated areas (AIAs), and is the leading irrigated area country in the World, along with China, was chosen for the study. Irrigated areas were derived for nominal year 2000 using time-series remote ...

Journal: :Agronomy 2022

This article describes the opinions and perceptions of farmers on water management tools that conserve groundwater alternative sources for irrigation. The analysis is based a survey producers (N=466) across Lower Mississippi River Basin (LMRB) areas Arkansas, Louisiana, Mississippi, Missouri. Summary statistics practice usage region each state are presented. A Poisson count model applied to dat...

2017
Tianyi Zhang Jinxia Wang Yishu Teng Suren N. Kulshreshtha

To improve adaptive capacity and further strengthen the role of irrigation in mitigating climate change impacts, the Chinese government has planned to expand irrigated areas by 4.4% by the 2030s. Examining the adaptive potential of irrigated area expansion under climate change is therefore critical. Here, we assess the effects of irrigated area expansion on crop yields based on county-level dat...

Journal: :New Medit 2021

Demand for animal products is expected to increase due human population growth, resulting in a need increased production. At the same time, climate change poses major threat viability and sustainability of livestock production systems. This study aimed evaluate compare sus-tainability dairy cattle farms belonging three farming systems (rainfed, irrigated, mixed) at northeast zone Tunisia using ...

2011
Murali Krishna Gumma Prasad S. Thenkabail Andrew Nelson

Mapping irrigated areas of a river basin is important in terms of assessing water use and food security. This paper describes an innovative remote sensing based vegetation phenological approach to map irrigated areas and then the differentiates the ground water irrigated areas from the surface water irrigated areas in the Krishna river basin (26,575,200 hectares) in India using MODIS 250 meter ...

Journal: :The Journal of animal ecology 2017
Shawn H Smith Karen Steenhof Christopher J W McClure Julie A Heath

Warming temperatures cause temporal changes in growing seasons and prey abundance that drive earlier breeding by birds, especially dietary specialists within homogeneous habitat. Less is known about how generalists respond to climate-associated shifts in growing seasons or prey phenology, which may occur at different rates across land cover types. We studied whether breeding phenology of a gene...

Journal: :اقتصاد پولی مالی 0
مصطفی عمادزاده روح اله همتی نیا محمد صیادی

despite the fact that iran enjoys a high-potential agricultural sector in production of various products and the important role this sector plays in the development of non oil-based exports, a large amount of the government budget is being spent on the vegetable oil and oilseed rape (as animal food) import. for this reason, during the recent years the production of oil-based products is conside...

Journal: :Int. J. Applied Earth Observation and Geoinformation 2015
J. Meghan Salmon Mark A. Friedl Steve Frolking Dominik Wisser Ellen M. Douglas

Irrigation accounts for 70% of global water use by humans and 33–40% of global food production comes from irrigated croplands. Accurate and timely information related to global irrigation is therefore needed to manage increasingly scarce water resources and to improve food security in the face of yield gaps, climate change and extreme events such as droughts, floods, and heat waves. Unfortunate...

Journal: :crop breeding journal 2012
a. moghaddam j. vollmann w. wanek m. r. ardakani a. raza

in eastern austria, alfalfa is usually grown as a rainfed crop in crop rotations in organic farming systems, where yearto- year rainfall fluctuations cause different levels of drought stress. to identify the suitability of different alfalfa genotypes and drought tolerance indices, 18 contrasting alfalfa genotypes were evaluated under irrigated and rainfed conditions at the research station of t...

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