KING AA NPK Zn contains in its formulation amino acids and organic acids that complex and mobilize Zinc towards the organs of the plant. KING AA NPK Zn contains a high concentration of Nitrogen, Phosphorus and Potassium that gives the plant great stability and strength in the face of adverse conditions. KING AA NPK Zn is a product developed for the correction and prevention of deficiencies of zinc (Zn), totally stable and soluble, being easily assimilable by plants.