Using Agricultural Anhydrous Ammonia Safely1

Anhydrous ammonia is one of the most efficient and widely used sources of nitrogen for plant growth. The advantages of ammonia’s relatively easy application and ready availability have led to its increased use as a fertilizer on Missouri farms. Anhydrous ammonia also has disadvantages, especially in its handling. It must be stored and handled under high pressure, which requires specially designed and well-maintained equipment. Workers also must be trained to handle this product and to follow strict work procedures to ensure operator safety. What is anhydrous ammonia (NH3), and why is it so risky to handle? It is a chemical made up of one part nitrogen (N) and three parts hydrogen (H3). The physical properties of this fertilizer make it one of the mos