THE RELATIONSHIPS BETWEEN CROP YIELDS, CLIMATE AND AGROMETEOROGICAL FACTORS (RIVNE REGION, UKRAINE)
Recently irrational use of soil resources and farming, which is far from optimal, lead to some extent to the crop yields losses and to the loss-making agriculture producing. However, there are a number of reasons that cause the lower crop yields and poor quality of the produce. Changes in climate and agrometeorological factors against the backdrop of global warming play a significant role among these reasons. The article presents the search results of relationships between crop yields, climate and agrometeorological factors in the Rivne region. The correlation coefficient and the coefficient of determination throughout the study period 2000-2016 were used to reach this goal. As a result of the study, we found out that increase average air temperature and maximum soil surface temperature, rise sums of effective and positive temperatures leads to an increase in yields of both typical crop species (grains, sugar beets, potatoes, vegetable crops) and new atypical (corn, rape, sunflower and soybeans). With the increase in such indicators as the minimum surface temperature, the average temperature in the arable soil layer, the rise in amount of rainfall and moisture in the arable soil layer and the hydrothermal coefficient the decrease in the yield of typical and atypical crop species takes place. The other result to emerge from the research is that the increase in such indicators as: the minimum surface temperature, the average temperature in the arable soil Собко З. З., Вознюк Н. М. layer, the rise in amount of rainfall and moisture in the arable soil layer and the hydrothermal coefficient leads to a decrease in the yields of typical and atypical crop species. Therefore, to achieve high yields, the climate and agrometeorological factors within optimal ranges are required.