Modeling of the soil organic matter dynamics and the soil nutrients in mineral soil and forest floor

Description of a new version of the model of soil organic matter dynamics and a model of calcium dynamics in the soil based on this new version are described. Different approaches to modeling of the soil processes are considered. The calcium dynamics model’s work has been applied for oak forest in the Moscow region with two scenarios of the development as an example. It has been shown that a response of pools of the more mobile calcium forms is significant after the external disturbances (clear cutting), but the response depends on the forest type and the total amount of the soil organic matter humus to some extent.