# The Sludge (Use in Agriculture) Regulations 1989, Paragraph 3

Extent: E+W+S

For each agricultural unit on which sludge is to be used, a representative sample of soil shall be obtained by mixing together 25 separate core samples, each taken to the depth of the soil or 25 centimetres, whichever is the lesser depth.

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Source: https://www.legislation.gov.uk/uksi/1989/1263/schedule/2/paragraph/3 (the official version)
Page: https://openlegislation.uk/sludge-use-in-agriculture-regulations-1989/schedule-2/paragraph-3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.