The purpose of the research is to identify the trends and factors of variability in the yield of the main agricultural crops in Kirov region. The study was conducted on the basis of data from the territorial body of Federal State Statistics Service for Kirov region for 2001-2020. An analysis of the regression equations showed that the yield dynamics for the analyzed period is most accurately described by a 2nd degree polynomial. The yield of grain and leguminous crops over a twenty-year period varied from 12.6 to 21.7 q/ha. The average yield for five years varied from 14.2 q/ha in 2001-2005 up to 19.6 c/ha in 2015-2020 The yield variation coefficient for five years varied from 8.6 to 15.5%, and the yield stability coefficient - from 91.4 to 84.5%, respectively. The highest yield was achieved in the last five years, due to the use of intensive production technologies. In addition to agricultural technology, productivity is also affected by factors of agrometeorological origin. According to the results of calculations, about 10% of the yield depends on the influence of weather and climatic conditions, respectively, 90% of the yield variation is due to the culture of agriculture. According to the results of calculations of positive and negative deviations of the actual yield from the dynamic average, it was revealed that the increase in yield in favorable years in terms of weather and climatic conditions can be 4.1 centners per hectare, and the shortfall in yield in unfavorable years will be 3.7 centners per hectare. Calculation of the climatic component according to the method of Pasov V.M. showed that the Kirov region belongs to the zone of moderately stable crops