Fertilizers, in particular mineral fertilizers; single or multi-nutrient fertilizers; organic fertilizers, including produced from recycling products, compost, pulp and liquid manure; mixtures of mineral and organic fertilizers of the aforesaid type; potassium salts, in particular potassium chloride, potassium sulphate, potassium nitrate, monopotassium phosphate; magnesium salts, in particular magnesium chloride, magnesium nitrate and magnesium hydroxide, kieserite, magnesium sulphate; magnesium oxide; sodium salts, in particular rock salt, sodium chloride, calcium nitrate, monoammonium phosphate, urea phosphate, chemicals used in industry