BS ISO 17323:2015 pdf download – Fertilizers and soil conditioners — Sulfur Coated Urea (SCU) — General requirements 1 Scope This International Standard specifies general requirements, sampling and preparation of test sample,marking and labelling, packaging, transport, and storage for SCU. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 7409, Fertilizers — Marking — Presentation and declarations ISO 7410, Fertilizers and soil conditioners — Final samples — Practical arrangements ISO 7742, Solid fertilizers — Reduction of samples ISO 8157, Fertilizers and soil conditioners — Vocabulary ISO 8633, Solid fertilizers — Simple sampling method for small lots ISO 17322, Fertilizers and soil conditioners —Analytical Methods for SCU 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 sulfur coated urea SCU coated controlled release fertilizer consisting of urea particles coated with sulfur Note 1 to entry: The product is usually further coated with a sealant and, if necessary, a conditioner to avoid tackiness from the sealant. [SOURCE: ISO 8157, 2.2.1.12] 3.2 slow-release fertilizers fertilizer, of which, by hydrolysis and/or by biodegradation and/or by limited solubility, the nutrients available to plants is spread over a period of time, when compared to a “reference soluble ” product, e.g. ammonium sulfate, ammonium nitrate, and urea [SOURCE: ISO 8157, 2.1.11] 3.3 controlled-release fertilizers fertilizer in which nutrient release is controlled, meeting the stated release rate of nutrient and the stated release time at a specified temperature Note 1 to entry: Typical examples are coated fertilizers. [SOURCE: ISO 8157, 2.1.12] 4 Requirements 4.1 Appearance The product shall be in granules. 4.2 Requirement of sulfur coated urea SCU products shall be tested to demonstrate conformance with all requirements specified in Table 1 and declared values on containers by the methods specified in ISO 17322. 5 Sampling and preparation of test sample 5.1 Sampling method 5.1.1 Products in bags Carry out sampling operation by following the procedure described in ISO 8633. Take care to avoid damage to, or destruction of, the coating. 5.1.2 Products in bulk Carry out sampling operation by following the procedure described in ISO 8633. 5.2 Reduction of samples Mix all the increments (collected as in 5.1) uniformly and promptly to...

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