Anthropogenic transformation of nitrogen of stern-podzolic soils (by results of researches in a long-term field experience)

In a long field experiment, the effect of increasing doses of total mineral fertilizer on the content of various forms of nitrogen in agrozems and agro-podzolic soils was studied. It is shown that the long-term use of NPK in increasing doses is an effective way to optimize the nitrogen regime of agrozems and agro-podzolic soils and improve the nitrogen nutrition of plants. At the same time gradual degradation of agricultural soils was noted in comparison with the natural background.