Efficiency of the elements of the technology of growing barley ardent fallow under weather conditions

Aim. To evaluate the nature of changes in weather conditions during years research and to reveal level dependence effectiveness precursors, doses mineral fertilizers, foliar fertilization main phases plant growth development, stimulator against background integrated protection on yield spring barley Viraj variety. Methods. Field – a long-term experiment study bio­tic abiotic factors, measurement-weighing for recording crop yield, comparative calculating action studied weighting indicators elements structure determining crop, statistical. Results. The assessment 2016–2020 was carried out regularities were established.It found that climate change, best optimizing processes development plants, which contribute maximum realization productivity potential variety, are observed when it is placed rotation after corn grain, ensured higher efficiency aftereffect with application directly under culture N45P90K90 N45 at IV stage organogenesis. Conclusions. In northern part right-bank forest-steppe, there significant fluctuation conditions, characterized by an increase temperature regime decrease amount precipitation. advantages grain over soybeans, as precursor fertilized backgrounds soybeans unfertilized ones, have been revealed. Among fertilizers studied, (5.06 t/ha 4.71 according predecessors) average provided introduction P90K90N(45+45) culture.