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6581177 
Book/Book Chapter 
Chapter 1: Global climate change and its impact on agriculture 
Bhattacharya, A 
2019 
Academic Press 
London, United Kingdom 
Changing climate and resource use efficiency in plants 
1-50 
English 
WOS:000474259600002 
Global climate change is not a new phenomenon. The effect of climate change poses many threats; one of the important consequences is bringing about changes in the quality and quantity of water resources and crop productivity. It can be concluded that the Indian region is highly sensitive to climate change. The agriculture sector is the most prone sector as it will have a direct bearing on the lives of 1.2 billion people. India has set a target of halving greenhouse gas emissions by 2050. There is an urgent need for coordinated efforts to strengthen the research to assess the impact of climate change on agriculture, forests, animal husbandry, aquatic life, and other living beings. Climate change, the outcome of “global warming,” has now started showing its impacts worldwide. Climate is the primary determinant of agricultural productivity which directly impacts on food production across the globe. The agriculture sector is the most sensitive sector to climate changes because the climate of a region/country determines the nature and characteristics of vegetation and crops. An increase in the mean seasonal temperature can reduce the growing duration of many crops and hence reduce final yield. Food production systems are extremely sensitive to climate changes, like changes in temperature and precipitation, which may lead to outbreaks of pests and diseases, thereby reducing the harvest and ultimately affecting the food security of the country. The net impact of food security will depend on the exposure to global environmental change and the capacity to cope with and recover from global environmental change. Coping with the impact of climate change on agriculture will require careful management of resources like soil, water, and biodiversity. To cope with the impact of climate change on agriculture and food production, India will need to act at the global, regional, national, and local levels. It has long been concerned with how crop water use efficiency responds to climate change. Most of the existing research has emphasized the impact of single climate factors but paid less attention to the effect of developed agronomic measures on crop water use efficiency. Based on the long-term field observations/experiments data, investigation have been carried out on changing responses of crop water use efficiency to climate variables (temperature and precipitation) and agronomic practices (fertilization and cropping patterns) in semiarid areas. 
global climate change; global warming; crop productivity; water use efficiency; radiation use efficiency; nitrogen use efficiency; food security; sustainable agriculture 
9780128162095