It is predicted that crop grain yields are very sensitive to changes in CO 2 , temperature, and nitrogen (N) fertilizer amounts For instance, [8] found that the wheat yield reduction (36 to 40%) than maize in the mid of the century (2021-2050).Similarly, [9] found that elevated temperature will reduce the total wheat production at a rate of 0.3928 Mt yr -1 during the period 1980-2016. Whereas, elevated CO 2 levels, water availability through irrigation, and nitrogen fertilizers have led to an increase in annual wheat production at 0.67, 0.25, and 0.26 Mt yr -1 , respectively, averaged over the period 1980-2016 in the case of India A strong increase in vulnerability is noted over time in the eastern and southern parts of Ethiopia The vulnerability analysis done for East Hararghe, Ethiopia, also revealed that more households are to be food insecure in the future than present
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Tamrat et al. (2022) studied this question.
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