Abstract

The concentration (activity) of mineral nutrients in soil solution of soils with different genetic structure and state of cultivation is constantly changing during the ontogenetic development of plants. The dynamics of this change is due not only to external factors, but also to internal soil buffer mechanisms, which significant diagnostic role is still ignored. Therefore, additional diagnostic criteria are needed that would take into account the dynamics of concentration (activity) of the most accessible for plants biogenic elements (“intensity factor”-IF), as well as soil ability to refound plants the most available biogenic elements. Functional diagnostics of soil fertility elements, as the main scientific course of our long-term fundamental research, is carried out on the basis of modeling the processes of soil internal regulation of soil solution, which is determined by soil buffer ability. As is commonly known, many different methods for diagnosing soil trophic regimes have been developed and recommended, which are expected to determine different forms of biogenic elements in soil environment-from highly mobile to variously connected with the solid “phase” of soil ones [1].