This standard specifies the technical requirements, test methods, inspection rules, labeling, packaging, transportation and storage of large-element water-soluble fertilizers. This standard applies to liquid or solid water-soluble fertilizers produced and sold within the territory of the People's Republic of China, which contain large amounts of nitrogen, phosphorus, and potassium as the main components, and add appropriate amounts of trace elements. This standard does not apply to fertilizer products with existing national or industry standards. Such as compound fertilizers (compound fertilizers) and fertilizers made only by chemical methods.