Fertilizer field can be divided in two main areas: the first one is the so-called ""commodities"". They include methane synthesized products (ammonia, urea, nitric acid and ammonium nitrate production), sulfuric acid and phosphate rocks (potentially combined with potassium salts). In this area, fertilizers are derived both from synthesis process and mixing process.The second area is the so-called ""specialities"": these products are highly differentiated in their respective categories, they require more sophisticated, cutting edge technologies and smoother structures to better suit market demands.