This U.S. industry comprises establishments primarily engaged in manufacturing compost through the controlled aerobic, biological decomposition and curing of biodegradable materials.
Manufacturing nitrogenous fertilizer materials or fertilizer materials from sewage or animal waste and mixing these ingredients into nitrogenous fertilizers--are classified in U.S. Industry 325311, Nitrogenous Fertilizer Manufacturing; Manufacturing phosphatic fertilizer materials and mixing these ingredients into phosphatic fertilizers--are classified in U.S. Industry 325312, Phosphatic Fertilizer Manufacturing; and Mixing ingredients made elsewhere into fertilizers--are classified in U.S. Industry 325314, Fertilizer (Mixing Only) Manufacturing.