DERMAFERT NPK 13-6-6 is an organo-mineral NPK fertiliser obtained through a reaction between mineral matrices and organic protein components. The formulation, with a low chlorine content, is characterised by a high content of organic nitrogen derived from scleroprotein, with natural slow release. The combination of different nitrogen forms – organic (2.5%) with slow mineralisation, ammoniacal (2%) and ureic (8.5%) – provides a differentiated, complete and prolonged nitrogen supply, suitable for supporting the vegetative growth throughout the entire crop cycle. The phosphates, reacting with the organic protein fraction (over 30%), are protected against insolubilisation processes, resulting in greater availability over time. The potassium from sulphate, fully assimilable, represent a quality index of the product, while the high content of sulphates contributes to the improvement the qualitative characteristics of the productions. DERMAFERT NPK 13-6-6 is indicated for basal fertilisation of citrus, orchards, olive groves and vegetable crops. Spring application is recommended to improve nutrient availability during the early stages of the vegetative cycle.