# Fertilisers (Sampling and Analysis) Regulations (Northern Ireland) 1996, Paragraph 8: EXPRESSION OF RESULT


Express the result as the percentage of total nitrogen (N) contained in the fertiliser as received for analysis.
Variant (a): N% = (50 − A) × 1.12
Variant (b): N% = (50 − A) × 1.12
Variant (c): N% = (35 − A) × 1.40
Where A = millilitres of sodium or potassium hydroxide used for the titration.

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Source: https://www.legislation.gov.uk/nisr/1996/513/schedule/2/part/I/chapter/5./paragraph/8 (the official version)
Page: https://openlegislation.uk/fertilisers-sampling-and-analysis-regulations-northern-ireland-1996/schedule-2/part-I/chapter-5./paragraph-8
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.