The study looked at different types of soil in Chernozem and found that grassland and oak forest have more organic carbon than arable soil. The ratio of different carbon fractions in the soil varied between the land use types, with arable soil having less carbon available for microbes. The researchers discovered that adding fertilizer helps stabilize soil carbon, while crop rotation has less impact on carbon turnover. This information can help farmers choose the best practices to preserve soil organic carbon in Chernozem soil.