Migration-mycelial chernozems in biospheric cycles within the Kursk region

In the course of different climatic cycles and the prolonged one in particular the biosphere including the plant and soil cover reveals considerable changes. Due to warming the cold six months and increasing the moisture in warm ones started in the 1970s the plant coenoses, the moisture regime and the whole calcareous profile have been highly changed in migration-mycelial chernozems of different ecosystems within the Kursk region. Based upon the long-term investigations (1947–2006) it seemed reasonable to conclude that during more than 30 years the above chernozems are found under conditions of the increased moisture which is not typical for them. As a result, their diagnostic features displayed great changes. The cyclic recurrence of their carbonate status has been determined as caused by cyclic climatic conditions and changes in plant coenoses and the moisture regime.