Minimization of Soil Pollution as a Result of the Use of Encapsulated Mineral Fertilizers

The application of nitrogen fertilizers allows increasing crop yields and partially increase the natural soil fertility.‎They have a negative influence on the environment due to the significant release of nitrogen. Hence, the technology‎for decreasing the N-release is proposed in this work. Obtaining of complex organo-mineral NPK fertilizers‎by encapsulating a carbamide granule with a phosphate-potassium shell with humates is the main aim of this work.‎The main tasks of this shell is slow release of the nitrogen and phosphate nutrients from the granules into the soil‎following the agrochemical needs of plants and prevention of soil pollution. The powdered components agglomeration‎of phosphate and potassium fertilizers with a small amount of liquid phase (plasticizer) allows forming‎a phosphate-containing coating on a carbamide core by means of the semi-dry method. This innovation allows‎organizing the production of such a product at the average enterprise with less capital investment. Carbamide‎prills, phosphate-glauconite concentrate, calcium and potassium ballast humate, and “Avatar” trace-element chelate‎complex were used in experimental studies. A preliminary assessment of the market prospects for such an innovation‎shows a high level of market attractiveness for all market participants: producers, consumers, and society.