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The Nitrate Pollution Prevention (Wales) Regulations 2013

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Calculating the amount of nitrogen available for crop uptake from organic manure

17.—(1) The occupier must establish the total amount of nitrogen in livestock manure, for the purposes of regulation 16, by—

(a)using the table in Part 1 of Schedule 3; or

(b)sampling and analysis in accordance with Part 2 of Schedule 3.

(2) Once the total amount of nitrogen in the livestock manure has been determined, the following percentages are assumed in order to establish the amount of nitrogen in the livestock manure that is available for crop uptake in the growing season in which it is spread;

Available percentage

Type of livestock manureAmount of nitrogen available for crop uptake in the growing season in which it is spread
Until 31 December 2013From 1 January 2014
Cattle slurry35%40%
Pig slurry45%50%
Poultry manure30%30%
Other livestock manure10%10%

(3) In relation to all other organic manure, the occupier must establish the total amount of nitrogen available for crop uptake in the growing season in which it is spread, for the purposes of regulation 16—

(a)by reference to technical analyses provided by the supplier;

(b)to the extent that such information is unavailable, by reference to the values given in the Fertiliser Manual (RB 209) (8th Edition)(1) (referred to therein as “nitrogen available to the next crop”); or

(c)by sampling and analysis in accordance with Part 2 of Schedule 3.

(1)

The Fertiliser Manual (RB209), 8th edition, is published by TSO, June 2010, ISBN 978-0-11-243286-9.

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