A process for coating fertilizer granules in which a mixture of adhesive and additive is provided and the particles of the additive in the adhesive are ground to a desired size. The mixture of adhesive and ground additive is then applied to the surface of the fertilizer granules and agitated to evenly...http://www.google.fr/patents/US5766302?utm_source=gb-gplus-shareBrevet US5766302 - Fertilizer coating process
