UNIVERSAL NPK 8-5-6 is an organo-mineral NPK fertiliser obtained through a reaction between mineral components and organic protein matrices. The formulation is characterised by organic nitrogen with slow mineralisation derived from scleroproteins, combined with a portion of synthetic nitrogen and significant amounts of phosphorus and potassium. The balanced ratio of nutrients ensures a gradual and constant release, which makes the product particularly suitable for nutrition of vines and fruit trees, in post-harvest or spring fertilisation, even in grassed systems. UNIVERSAL NPK 8-5-6 is also suitable for basal fertilisation of herbaceous crops: a light pre-sowing incorporation promotes the mineralisation of organic matter. Its high agronomic efficiency, due to its organic nitrogen and organic matter content, combined with a competitive price/quality ratio, allows the product to be a valid alternative to conventional mineral fertilisers.