T/BYXT 059-2023 Rare earth base fertilizer

Scope

Scope: This document specifies the terminology definitions, technical requirements, test methods, inspection rules, labeling, packaging, transportation and storage, and sales and services for rare earth-based fertilizers. This document applies to the production and sales of rare earth-based fertilizers; Main technical content: 4.1 Appearance requirements: Granular, bar-shaped, or sheet-shaped products, free from mechanical impurities. 4.2 Technical indicators: The products shall comply with the technical indicators in Table 1. Table 1 Technical Indicators Item Indicator Superior Grade Pass Total Nutrients a (N + P2O5 + K2O)/% ≥40.0 ≥30.0 ≥25.0 Water-soluble phosphorus as a percentage of effective phosphorus b ≥60.0 ≥50.0 ≥40.0 Nitrate nitrogen c ≥1.5 Water content d (HO2) ≥0.08 1.0 1.5 Particle size e (1.00 mm - 4.75 mm or 3.35 mm - 5.60 mm)/% ≤90 Rare earth elements f (calculated as lanthanum cerium oxide) ≤0.25 ≤0.20 ≤0.10 pH (1:250 water extract) 9.80 9.70 9.50 Single medium element g /% Effective calcium ≤1.0 Effective magnesium ≤1.0 Total sulfur ≤2.0 Single trace element h /% ≥0.02 Heavy metal limit components Chlorine (Cl) ≤0.000059% ≤1.0% ≤3.0% Sodium (Na) ≤0.03% ≤1.0% ≤3.0% Mercury (Hg) ≤0.0ppm ≤2ppm ≤5ppm Arsenic (As) ≤1.1ppm ≤3ppm ≤10ppm Cadmium (Cd) ≤2.6ppm ≤5ppm ≤10ppm Lead (Pb) ≤28.8ppm ≤35ppm ≤50ppm Chromium (Cr) ≤12.4ppm ≤30ppm ≤50ppm The single nutrient content of the product shall not be less than 4.0%, and the absolute value of the negative deviation between the single nutrient determination value and the marked value shall not exceed 1.5%. b When "Glycine-soluble phosphorus-based fertilizers" such as calcium magnesium phosphate fertilizers are used as the basis phosphorus fertilizers and are labeled as "Glycine-

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