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Despite outputs of many models for estimating the impacts of climate change on crop production vary widely due to multidimensional complications (Karim et al., 1999; Reilly, 1996; Reilly et al., 1996), generally the simulation results support the statement that global agricultural production might not suffer much, though regional effects will vary widely (Reilly et al., 1996a). The effects will be more acute in the subtropical and tropical (Karim et al., 1999) developing countries (Walker and Steffen, 1997) such as Bangladesh. The country is already a victim of hydro- meteorological variability, as it suffers from moisture stress during the pre-monsoon and post-monsoon periods, when the Potential Evapo-transpiration (PET) stays lower than the available moisture in soil due to uncertainty of rainfall for the first period and insufficient rainfall for the second period (Karim et al., 1990). In both periods, rising temperature coupled with unavailability of rainfall hike up the moisture stress in soil leading the condition to an agricultural drought which eventually affects the major crops (e.g., HYV Boro, Aus, Wheat, Pulses, Sugarcane and potato) and cause significant damage in production where irrigation is limited.
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