The article considers the effect of agricultural crops (pea-oat mixture, narrow-leaved lupin, mustard, rapeseed, oats on grain) grown according to the organic farming system without the use of mineral fertilizers and against the background with the introduction of nitroammophosky at a dose of N30P30K30 kg d.v., used as a siderate on the biological properties of podzolized chernozem. It has been established that the number and biomass of earthworms are indicators of an increase in the biological properties of the soil of podzolized chernozem. The largest number of earthworms and caprolites in the spring and autumn of 2023 was observed after plowing the pea-oat mixture both against the background of the use of mineral fertilizers and without their use. In the Middle Urals, pea-oat mixture and narrow-leaved lupine are most effectively used as a precursor for barley from sideral crops, providing the highest grain yield and having a beneficial effect on the biological properties of the soil. The analysis of barley yield showed that the introduction of azofoska at a dose of N30P30K30 kg d.v. provided a significant increase in yield only in the variant with lupine plowing - 0.25 t/ha