The analysis of productivity studies of spring oilseeds of the Brassicaceae family during their cultivation on gray forest soil in the crop rotation link in Ryazan region, Russia is proposed. The influence of variants of the main tillage on the yield of spring rape variety Ratnik and spring rape variety Lipchanka has been studied. The experiments were carried out in 2015-2020 on dark gray forest soils. Agrotechnical measures for the cultivation of spring oilseeds are typical for the Non-Black Earth Zone of Russia, which includes Ryazan region. On average, according to the research results, the highest yield in spring rape was recorded on the variant of the fallow link of the crop rotation + moldboard processing (3.13 t/ha), in the spring rape (2.56 t/ha). When determining the biological activity of the soil, the method of linen with a density of 150 g/m2 was used. In the experiment, on the variant with the moldboard method, when using a reversible plow, the degree of decomposition of the linen was the greatest in the experiment. In agrocenoses of agricultural crops, a pattern was noted for an increase in biological soil activity, in rape the degree of decomposition was recorded in 45.3 % and in spring coleseed it was 41.9 %.