Complex sentence: This raw ore is then piped as a slurry to washing plants, where it is cleansed of impurities, then shipped by rail to the processing plants, where it is often combined with other chemicals, among them sulphur and anhydrous ammonia to create the fertilizer.
Split into simpler sentences: This raw ore is then piped as a slurry to washing plants, where it is cleansed of impurities. This wetrock is then shipped by rail to the processing plants, where it is often combined with other chemicals, among them sulphur and anhydrous ammonia to create the fertilizer.