# The Sludge (Use in Agriculture) Regulations 1989, Paragraph 4

Extent: E+W+S

The average annual rate of addition referred to in regulation 3(4) shall be ascertained for each of the elements in the sludge table by taking the average amount of that element in the sludge used on that land in the period of ten years ending on the date of such use.
SLUDGE TABLE
(1)
(2)
(3)
Element
Kilograms per hectare per year
Limit of detection (mg/kg of dry matter)
Zinc
15
50
Copper
7.5
25
Nickel
3
10
Cadmium
0.15
1
Lead
15
25
Mercury
0.1
0.1

---
Source: https://www.legislation.gov.uk/uksi/1989/1263/schedule/1/paragraph/4 (the official version)
Page: https://openlegislation.uk/sludge-use-in-agriculture-regulations-1989/schedule-1/paragraph-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.