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Fertilizers - Part 4- Chemical analysis - Section 4.2 Determination of phosphorus - Subsection 4.2.1- Extraction of water-soluble phosphates. Original standard BS 5551-4.2.1-1978 (1999) ISO 5316-1977 in PDF full version. Additional info + preview on request

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Fertilizers - Part 4- Chemical analysis - Section 4.3 Determination of potassium - Subsection 4.3.1 Preparation of the test solution for determination of water-soluble potassium content. Original standard BS 5551-4.3.1-1983 (1999) ISO 5317-1983 in PDF full version. Additional info + preview on request

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Fertilizers - Part 4- Chemical analysis - Section 4.3 Determination of potassium - Subsection 4.3.2 Preparation of the test solution for determination of acid-soluble potassium content. Original standard BS 5551-4.3.2-1983 (1999) ISO 7407-1983 in PDF full version. Additional info + preview on request

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Fertilizers - Part 4- Chemical analysis - Section 4.5 Method for determination of mineral-acid-soluble sulfate content of solid fertilizers. Original standard BS 5551-4.5-1993 (1999) ISO 10084-1992 in PDF full version. Additional info + preview on request

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Building construction - Stairs - Part 2- Modular co-ordination- Specification for co-ordinating dimensions for stairs and stair openings. Original standard BS 5578-2-1978 (1999) ISO 3881-1977 in PDF full version. Additional info + preview on request

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Methods of sampling and test for halogenated hydrocarbons - Part 1- Sampling of liquid products. Original standard BS 5598-1-1978 (1999) ISO 2209-1973 in PDF full version. Additional info + preview on request

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