The results of the study of the application of fertilizer systems and basic soil tillage on the content and balance of humus in chernozem of the typical right-bank forest-steppe of Ukraine are presented. It has been established that the content of humus in chernozem is typical (layer 0-30 cm) for the application of fertilizers in the field crop rotation is within the range of 3.63-4.06% depending on the research options. The highest content of humus in crop rotation was in the version for the organo-mineral fertilizer system, which is 4.06% on the background of shallow, non-polar soil cultivation and has the best effect on the preservation of humus. Application of organo-mineral fertilizer system in the field crop rotation promotes the largest formation of humus + 0.16 t/ha. Mineral fertilizer system is not able to restore the newly created humus in the arable layer of soil
humus, humus balance, typical black currant, fertilization, soil cultivation
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