EFFECT OF WETTING CONDITIONS ON THE DURATION OF VEGETATIVE PERIOD AND THE YIELD OF SOYBEAN IN THE CENTRAL CHERNOZEMIC ZONE
The effect of precipitation during the summer period on the yield of soybean Mageva variety in Kaluga region has been analyzed in long-term studies. No close correlation has been found between the duration of the vegetative period of soybean and the amount of precipitation during the growing season. A direct correlation has been observed between the soybean yield and rainfall in July (r = 0.31-0.49). In the years with insufficient moisture, the correlation between the crop yield and rainfall in June was low (r = 0.29).