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The research was conducted in the Nizhny Novgorod region in 2019 on light gray forest soil in the pea-oat crop rotation link. Studied was the effect of soil tillage systems (traditional mouldboard tillage with mouldboard plow; non- mouldboard "deep" tillage with boardless plow; non-mouldboard surface tillage with a Pottinger Synkro 5030 K chisel cultivator; minimal tillage with a disc harrow Discover XM 44660 nothad; zero tillage (No-till) with a Sunflower 9421-20 seeder) and the influence of mineral fertilizers (N60P60K60 kg a. i.) and straw destructors (ammonia saltpeter in a dose of N10 kg. a.i. per 1 ton of straw and Stimix ® Niva biologics, 2 l/ha) on changes in the yield and quality of Yakov variety oat grain. The traditional system of soil tillage provided the yield of oat of 4.82 t/ha when using mineral fertilizers in a dose of N60P60K60 together with ammonium nitrate as a straw destructor, which was 1.04 t/ha (LSD05 =0.72) higher than the best result in terms of the yield of this crop obtained when it was cultivated using the No-till technology with the Stimix@Niva biological product on the background of N60P60K60 (3.78 t/ha) . Use of the studied straw destructors is more effective for the N60P60K60 background than for the non-fertilized background for all the studied soil tillage systems. When growing oat using No-till technology, the largest mass of 1000 grains was obtained when using ammonium nitrate - 46.5 g compared to other studied variants of using fertilizers and biologics (40.8-43.9 g, LSD05 =1.1). Due to the unfavorable weather conditions of the growing season in 2019, the indicators of oat grain-unit were low. The lowest average grain-unit was found in oat cultivated using zero technology - 228.4 g/l, which is 16.2-18.4 g/l (LSD05 - 3.0) lower than this indicator of grain quality when cultivated according to the rest of the studied tillage systems (244.6-246.8 g/l).