Changes in the Content of Organic Matter in Southern Chernozems under the Influence of Different Methods of Soil Treatment in Crop Rotations in the Conditions of the Steppe Zone of the Crimean Peninsula

The article presents the results of long-term studies on the effect of various soil cultivation systems on the content of organic matter. It has been established that the content of organic matter in the soil significantly depends on the level of anthropogenic impact, as well as on the method of primary cultivation. The presented data show a change in the humus content for 2017–2024 from the initial value (2015) using the direct seeding technology (no-till) towards an increase in the 0–30 cm layer by 0.26%, which contributes to the stabilization of the humus state of southern chernozem in the five-field crop rotation system. The productivity of five-field crop rotation crops was greatly influenced by the level of precipitation; in the dry years of 2017, 2019 and 2024, a decrease in productivity by 10, 50 and 28%, respectively, was noted.