DERMAFERT NPK 4-8-18 is an organo-mineral NPK fertiliser with a low chlorine content, obtained through a rection between mineral matrices and organic components, which provides a maximum phosphate protection against insolubilisation processes. The formulation contains organic nitrogen with natural slow release, a high content of potassium from sulphate, full water soluble, a low chlorine content and a high level of organic protein matter (20%). This formulation increases the fertiliser unit efficiency and promotes a gradual availability of the nutrients. Thanks to these characteristics, DERMAFERT NPK 4-8-18 is particularly suitable to the vineyards fertilisation, both grasses and non-grassed, to high quality crops sensitive to chlorides, in potassium deficient soils, where it supply a balanced nutrition with nitrogen and phosphorous and an high amount of potassium. It is, also, recommended for autumn and spring basal fertilisation.