ArticleThe aim of the study was to determine the efficiency of the barley treatment crops
with modern retrograde preparations on the background of the mineral fertilizers introduction
into the photosynthetic activity of crops and grain yield. The experiments were carried out in
2013 -2017 on the southern black soil in the conditions of the Ukrainian Steppe. On the basis of
the study results, it was determined that the introduction of irrigated fertilizer barley in a dose of
N30P30 (background) under pre-sowing cultivation and the application of extra-root crop
supplements at the phases beginning of the barley outflow straw into the tube and the
organoleptic fermentation of Organic D2 and natural microbial complex Escort - Bio creates
favorable conditions for the formation at the optimal levels of photosynthetic parameters and
grain yield. Thus, on average, over the years of research and by factor variety, grain yield on
these experimental variants was 3.37–3.41 t ha-1
, which exceeded its level on uncontrolled
control by 0.71–0.75 t ha-1 or 26.7–28.2%. Based on the study results, the use of modern
regenerating agents against the background of mineral fertilizers can be recommended as an
expedient and effective measure of spring barley raising the productivity
