Protein quality of winter wheat depending on the dressing with sulfur-containing nitrogen fertilizers applied in early spring

The paper contains the study results of the effect of sulfurcontaining nitrogen fertilizers on the quality of protein in winter wheat grain grown in the Ulyanovsk region on soils with a lack of sulfur. The experimental crop is soft winter wheat, the variety “Saratovskaya – 17”. As a result, it was found that the biological value of protein compared to the control option increased by 11.5% in the option with the use of 5% of sulfur