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The long-term dynamics of agro-climatic resources in Ukraine and forest steppe zones in the current climatic period was studied in this work (1997-2016 years.). The influence of the thermal regime and moistening regime on the state of agroecosystems of winter wheat and corn has been analyzed, namely the yield, the degree of weediness and damage by pests of the crops with the help of the correlation regression analysis. It was established that the amount of precipitation in May and June affect the productivity of winter wheat (the correlation coefficient is 0.8). Whereas for corn, the determining factor are the precipitation in July (correlation coefficient 0.6). In the course of analysis the degree of weediness was found to affect the yield of winter wheat and corn (correlation coefficient is -0,9 and -0,5). In addition, the productivity of certain crops depends on the degree of damage to pests and diseases (r = -0.87 and -0.7, respectively).

Ecological features of the state changes of the agroecosystem components depend on the specific effects of environmental climatic factors