Components of the biotope soil and yield of barley

The highest intensity of decomposition of plant residues under spring barley crops was in the crop rotation with sideral steam of 88%, which was higher by 2.3% compared to pure, and for tillage by 88.3%. Soil enrichment with the enzyme urease on the Zvyagintsev scale is considered average and sufficient for the conversion of ammonium nitrogen in nitrogen exchange. High intensity of decomposition of plant residues, sufficient activity of soil urease are the indicators that characterize high soil fertility, were insufficient to obtain high yields of barley. The productivity of spring barley of the Povolzhsky 65 variety in some years reached 3.2 t / ha when tillage on a fertilized background in crop rotations with pure and sideral steam. Averaged four-year results on the yield of barley showed the highest results on tillage on a fertilized background and revealed the advantage of sideral steam. The correlation coefficients of decomposition of plant residues of soil and urease activity, as well as the yield of spring barley, showed a positive correlation for all variants of the experiment, in which an increase in one indicator is associated with an increase in the other.