FERTIFIELD NPK 5-10-15 BIO is an organo-mineral NPK fertiliser with low chlorine content, obtained through a reaction between mineral components and organic protein matrices, a process that increases the bioavailability of nutrients and improves the assimilability of mineral fractions. FERTIFIELD NPK 5-10-15 BIO is characterised by organic nitrogen with slow natural release, derived from selected protein matrices, phosphates of both mineral and organic origin, which are highly bioavailable thanks to the reaction process with the organic matter, potassium from sulphate with a very low chloride content, and selected organic matter (meat and bone meal, hydrolysed leather and hides) which, through slow mineralisation, guarantee sustainable nutrition. All these properties give FERTIFIELD NPK 5-10-15 BIO significant agronomic efficiency, allowing for reductions in application rates up to 20-25% compared to mineral fertilisers with the same or higher nutrient content. It is suitable for all high quality crops, horticultural and fruit crops, which require prolonged and constant nutritional supply..