نتایج جستجو برای: rainfed agriculture

تعداد نتایج: 66736  

2006
C. Sarkar A. Gadgil K. Mallick G. D. Bairagi K. Patel S. Parihar

Relative (actual / potential) evapotranspiration (RET) was derived using ten-day composite NOAA PAL datasets (8km x 8km spatial resolution) over Indian landmass and an operational energy balance algorithm for five agricultural years (June-May) between 1996 to 2001. This was used to characterize ‘Kharif’ (June-October) rice growing environment and its yield prediction in rainfed conditions. Inve...

Journal: :International journal of biometeorology 2011
Mohammad Bannayan Sajad Sadeghi Lotfabadi Sarah Sanjani Azadeh Mohamadian Majid Aghaalikhani

Climate variability adversely impacts crop production and imposes a major constraint on farming planning, mostly under rainfed conditions, across the world. Considering the recent advances in climate science, many studies are trying to provide a reliable basis for climate, and subsequently agricultural production, forecasts. The El Niño-Southern Oscillation phenomenon (ENSO) is one of the princ...

Extended Abstract Introduction and Objective: Drought stress is one of the most important factors in reducing yield and barley production in rainfed arid regions, and counteracting or reducing the effect of stresses as a useful solution to increase barley yield. Therefore, improvement of stress-tolerant and suitable barley cultivars for arid and semi-arid regions is essential. Material and Me...

2010
R. Chandra Babu

Drought is a major constraint affecting rice production, especially in rainfed areas across Asia, Africa and South America. Development of drought resistant varieties will considerably improve rainfed rice production. Rice breeding programs focusing on drought resistance by direct selection for yield under stress have made little progress to date. Incorporation of secondary traits contributing ...

Journal: :Remote Sensing 2013
Vikalp Mishra James F. Cruise John R. Mecikalski Christopher R. Hain Martha C. Anderson

Biophysical crop simulation models are normally forced with precipitation data recorded with either gauges or ground-based radar. However, ground-based recording networks are not available at spatial and temporal scales needed to drive the models at many critical places on earth. An alternative would be to employ satellite-based observations of either precipitation or soil moisture. Satellite o...

Journal: :Land 2023

Rainfed agriculture in Northern Darfur is influenced by erratic seasonal and decadal rainfall patterns frequent droughts. Understanding the spatio-temporal variation rainfed crucial for promoting food security, socio-economic stability protecting vulnerable ecosystem. This study aimed to investigate dynamics of North State from 1984–2019 using multitemporal Landsat observation data. Using rando...

A. Jafari Ardakani F. Azimi M. Parehkar R. Bayat R. Talaei

One of the main resonator factors in watershed soil erosion is inappropriateland management including conversion of pasture land to dry-land farming.Unfortunately, the changes of Gara Su watershed usages have been very common.Thus, in order to understand the influence of land use on runoff rate and soil loss, soillosses were investigated and determined under both pasture and dry-land agricultur...

Journal: :Regional Environmental Change 2022

Abstract This study quantifies the impacts of climate change on yields and corresponding economic losses in six relevant crops that account for 65% harvested area Mexico are highly terms consumption value. The results show crop could decrease considerably during this century, especially rainfed management system. Under a high-emission scenario, large reductions expected by end century both irri...

Journal: :محیط زیست طبیعی 0
هادی رحیمی کارشناسی ارشد محیط زیست، دانشگاه علوم کشاورزی و منابع طبیعی گرگان عبدالرسول سلمان ماهینی دانشیار دانشکدۀ محیط زیست، دانشگاه علوم کشاورزی و منابع طبیعی گرگان حمیدرضا کامیاب دانشجوی دکتری محیط زیست، دانشگاه علوم کشاورزی و منابع طبیعی گرگان

in this research priority of gorgan’s sub- watershed were done after normalizing the indicators using gis software. the multi-attribute decision-making methods including electre, topsis and saw were used in this study. ahp was applied in order to weighting the indicators in expert choice software. first, priority the sub-watershed were done by electre, topsis and saw using the excel. each metho...

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