Nitrogen Salts. Inorganic salts which dissolve easily in water.They are produced industrially using natural gas, atmospheric nitrogen, and minerals.. Examples:Ammonium sulfate NH4SO2 Ammonium nitrate (NH4NO3) Potassium nitrate(KNO3). Complex Nitrogen Containing Compounds. These fertilizers do not dissolve easily in water.Their nutrients are released slowly. This provides a more even supply of nutrients to plants..