In relation to solid manures, the samples must be taken from a manure heap.

At least ten samples of 1 kg each must be taken, each from a different location in a heap.

Each sub-sample must be taken at least 0.5 metres from the surface of the heap.

If samples are being collected to calculate compliance with the whole farm limit for pigs and poultry, four samples for analysis must be taken in a calendar year (one taken in each quarter) from manure heaps not more than 12 months old.

The sub-samples must be placed on a clean, dry tray or sheet.

Any lumps must be broken up and the sub-samples must be thoroughly mixed together.

A representative sample of at least 2 kg must then be sent for analysis.