This standard specifies the requirements, test methods, inspection rules, packing, marking, transportation and storage of bulk blending fertilizer.
This standard is applicable to the fertilizers with various name made by dry mixing method with the declarable contents of at least two nutrients from nitrogen, phosphorus and potassium, to the bulk blending fertilizer which is slow release type, controlled release type and whose organic matter mass fraction is not greater than 20%, to the compound fertilizer or complex fertilizer of dry mixing fertilizer granules filling nitrogen and (or) phosphorus and (or) potassium.
This standard is not applicable to the products only dry mixing organic particle and (or) biological agent particle and (or) trace elements particle.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding amending errors in the text) to, or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest editions of these documents are applicable. For undated references, the latest edition of the normative documents referred to applies.
GB/T 1250 "Rules for Expression and Judgment of Limiting Values"
GB/T 6679-2003 "General Rules for Sampling of Solid Chemical Products"
GB 8569 "Packing of Solid Chemical Fertilizers"
GB/T 8572 "Determination of Total Nitrogen Content for Compound Fertilizers - Titrimetric Method after Distillation"
GB/T 8573 "Determination of Available Phosphorus Content for Compound Fertilizers"
GB/T 8574 "Determination of Potassium Content of Compound Fertilizers Potassium - Tetraphenyl borate Gravimetric Method"
GB/T 8576 "Determination of Free Water of Compound Fertilizers - Vacuum Oven Method"
GB/T 8577 "Determination of Free Water of Compound Fertilizers - Karl Fischer Method"
GB 9969.1 "General Principles of Preparation of Instructions of Use of Industrial Products"
GB/T 14540 "Determination of Copper, Iron Manganese, Zinc, Boron and Molybdenum Content of Compound Fertilizers"
GB 15063-2001 "Compound Fertilizer (Complex Fertilizer)"
GB 18382 "Fertilizer Marking-Presentation and Declaration"
GB/T 19203 "Determination of Calcium, Magnesium and Sulphur Content of Compound Fertilizer"
HG/T 2843 "Chemical Fertilizer Products-Standard Volumetric, Standard, Reagent and Indicator Solutions of Chemical Analysis"
3 Terms and Definitions
The following terms and definitions are applicable to this standard.
3.1 Bulk blending fertilizer
The particle fertilizer prepared by dry mixing method, with declarable content of at least two nutrients from nitrogen, phosphorus and potassium, also called BB fertilizer.
3.2 Total primary nutrient
The sum of total nitrogen, effective phosphorus pentoxide and potassium oxide content, expressed by mass fraction.
3.3 Declarable content
The element (or oxide) content indicated in the package, label or inspection certificate of fertilizer.
3.4 Formula
A method to express, with Arabic numerals, the proportion (in percentage) of N-P2O5-K2O (total nitrogen-effective phosphorus pentoxide-potassium oxide) in compound fertilizer in such sequence. The sum of thosel values shall be equal to the declarable content of the total primary nutrient.
Note: "0" means such element is not included in the fertilizer.
