Evaluating the impact of intensive grazing on the grasslands productivity is very important for assessment of the risk of deterioration of soils and rangelands. Quantification of carbon and nitrogen cycles is an important step towards of parameters of admissible anthropogenic load. Rational use of resource potential of a territory and elimination of ecological risk emerging as a result of intense anthropogenic impact is one of important aspects of the sustainable development of the region. The impact of grazing is simulated and it was demonstrated that steady state carbon and nitrogen were sensitive to grazing intensity. Modeling provides potential for testing hypotheses on rates of nutrient accumulation, litter decomposition and identify gaps in the soil processes presentation. Since models are applied to the systems with different intensity of grazing it became possible to estimate consequences of the land use, define local specific processes that could persist under specific regimes of farming.