Technologies for obtaining nitrogen fertilizers prolonged effect in wheat

Increase of productivity of agricultural crops should be achieved by the using of mineral fertilizers so as not to contribute to global environment pollution. This resolution of the problem can be achieved through obtaining of nitrogen fertilizers of prolonged action and using these fertilizer's contaminants under cereal crops like wheat. In this case the hectare norm of nitrogen defined by agrarian rules will decrease with 40-50%, and it w l be very urgent with economic and ecologic point of view.