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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
 
Creator NICRA
 
Subject carbon dioxide, chlorofluorocarbons
 
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
 
Date 2021-07-20T09:44:38Z
2021-07-20T09:44:38Z
2011-08-08
 
Type Technical Report
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/49197
 
Language English
 
Relation Not Available;
 
Publisher NICRA