Abstract
The long-term impact of atmospheric events is defined as climate. Agricultural activities are more affected by climate change since they mostly rely on nature. Agricultural activities may also induce climate change. Therefore, it is valuable to know how agricultural activities are affected by climate change. Therefore, this study was conducted to assess long-term changes in climate and agricultural products and mutual relationships between them in the Suşehri district of Sivas province located in the Kelkit Basin. Climate (air temperature, precipitation, and relative humidity) and yield (crops of wheat, dry bean, and chickpea) data of the 1991 – 2017 period were used. Long-term temporal changes were tested with the nonparametric Mann-Kendall trend test. Relationships were analyzed with the use of the Cochrane-Orcutt estimation regression. The air temperature showed increasing tendency both annually and seasonally, and also had negative effects on wheat yield. Relative humidity showed a positive relationship with the wheat yields both annually and seasonally. Any climate data did not have a significant effect on chickpea and dry bean yields. If the temperature increase continues in the future, negative effects of climate change on agricultural products of the region will be inevitable. It is likely that agriculture in the region will shift to higher altitudes in time. Present findings could be used for the entire Kelkit Basin, which is located in the same climate and geographical zone as Suşehri district.
Highlights
Climate is defined as the long-term effect of atmospheric events and it is continuously changing over the years (Türkeş et al, 2000)
For 27-years period, mean annual air temperature, precipitation and relative humidity were calculated as 10.36 0C, 35.33 kg m-2 and 56.43%, respectively
Mean production area was calculated as 143469.2 decares for wheat and 9687.4 decares for bean and 1709.4 decares for chickpea
Summary
Climate is defined as the long-term effect of atmospheric events and it is continuously changing over the years (Türkeş et al, 2000). Global climate change is defined as the increase in the average surface temperature of the earth through increasing effects of greenhouse gases including CO2 (carbon dioxide), CH4 (methane), N2O (nitrous oxide), O3 (ozone), CFCs (chlorofluorocarbons), and H2O (water vapor), which are encountered mostly as a result of human activities (Dellal and McCarl, 2007). Agriculture is an important position in terms of both being affected and causing climate change. Agricultural activities such as incorrect land use, excess chemical input (fertilizers, chemical pesticides, insecticides), tillage and livestock operations may increase the release of greenhouse gases, inducing climate change
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