The production of compound fertilizers often uses soil testing formulas to measure the nutrient status of the soil. Soil testing formula fertilization is based on soil testing and fertilizer field experiments, and proposes the application quantity, fertilization period, and application method of nit

The two national standards GB18382-2001 "Labeling, Content and Requirements for Fertilizer" and GB/T15063-2009 "Compound Fertilizer" issued by the General Administration of Quality Supervision, Inspection and Quarantine of China have officially come into effect in the production and distribution sta