EFFICIENCY OF WINTER WHEAT CULTIVATION AFTER SPRING BARLEY IN THE NORTHERN STEPPE OF UKRAINE

The influence of environmental conditions and mineral fertilizers on the efficiency of growing winter wheat after spring barley was revealed. It was found that nitrogen feedings after stubble previous crop in the spring-summer period of growing season does not lead to an increase in plant productivity in dry years. In favorable years in terms of moisture supply yields and economic indicators of cultivation increased. Thus, on average for 2016-2018, the highest yield and net income from the growing winter wheat after spring barley were obtained in the experimental variants, where feeding with ammonium nitrate N60 on the background of N60P60K30 was carried out on freeze-thawed soil or in two terms: N60 on freeze-thawed soil and N30 locally at the end of the tillering stage of plants. According to the fertilization variant, the yield and net income varied within 4.78-5.47 t/ha and 16,041-19,949 UAH/ha, as well as 5.03-5.62 t/ha and 16,752-21,347 UAH/ha.