SOIL NITROGEN CONTENT AND EFFECTIVENESS OF NITROGEN FERTILIZERS FOR WINTER WHEAT IN MOLDOVA

The paper presents the experimental data on the state of nitrogen fund in soil of Moldova, modification of nitrification capacity and mineral nitrogen reserves in agricultural land in use and efficiency nitrogen fertilizers in the cultivation of winter wheat. It was established that soil mineral nitrogen reserves are insufficient for plant nutrition and obtaining high yields of winter wheat. Nitrogen fertilizer application on the optimal fund of mobile phosphorus in soil provides a significant increase in harvest. Each kilogram of nitrogen applied on the cultivation of winter wheat recovers with 10- 15 kg of grain.