Assessment of the impact of increasing temperature and rainfall variability on crop productivity in drylands - An illustrative approach
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Title |
Assessment of the impact of increasing temperature and rainfall variability on crop productivity in drylands - An illustrative approach
Assessment of the impact of increasing temperature and rainfall variability on crop productivity in drylands - An illustrative approach |
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Creator |
NICRA
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Subject |
carbon dioxide, chlorofluorocarbons
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Description |
Not Available
Inter-annual variability in yields of rainfed crops is often attributed to changes in the weather conditions form year to year. Therefore, research efforts in dryland agriculture were focused hither to on developing cropping strategies and management practices in accordance with the variability in seasonal rainfall and other weather parameters. Of late, there is growing awareness on changes in global climate and its impact on agriculture. Scientists from all over the world have started analyzing historical weather data for different locations to examine • climatic variability form year to year • cyclic effects on climatic variability, and • trends in climatic variability There were evidences that there is an increasing trend in global temperatures during the last hundred years although the magnitude of increase is not exactly the same in all the regions. Rapid industrialization, increased use of fossil fuels, destruction of native vegetation to bring more area under cultivation to meet the growing requirement of food have all contributed to increased greenhouse gases, atmospheric pollution and consequent changes in the world climate. The major cause to climate change has been ascribed to the increased levels of greenhouse gases like carbon dioxide (CO2 ), methane (CH4 ), nitrous oxides (N2 O), chlorofluorocarbons (CFCs) due to burning of fossil fuels, increased use of refrigerants, and chemical based agricultural practices. These activities accelerated the processes of climate change and increased the mean global temperatures by 0.6°C during the past 100 years. It has also induced increased climatic variability and occurrence of extreme weather events in many parts of the world. Studies indicate that the recent years viz., 1997, 1998 and 1999 have been among the warmest during the past century and the process continued into the 21st century and the year 2010 was declared as the third warmest year since 1860, the period for which instrumental records are available. According to IPCC (2007), the 21st century is projected to experience 1.8 to 4.0 o C rise in surface air temperature 1. INTRODUCTION 2 together with very likely occurrence of frequent warm spells, heat waves and heavy rainfall and a likely increase in the frequency of droughts. Not Available |
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Date |
2021-07-20T09:44:38Z
2021-07-20T09:44:38Z 2011-08-08 |
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Type |
Technical Report
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Identifier |
Not Available
Not Available http://krishi.icar.gov.in/jspui/handle/123456789/49197 |
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Language |
English
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Relation |
Not Available;
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Publisher |
NICRA
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