Fertilisers (Sampling and Analysis) Regulations (Northern Ireland) 1991 (S.R. No. 540 of 1991).
The Regulations provide for a number of matters concerning the sampling and analysis of fertilizers including; (a) the amounts of fertilizers from which samples are to be taken (reg. 2); (b) the manner of taking, marking, sealing and fastening up of samples (reg. 3 and Schedule 1); (c) the methods of sending part of a sample (reg. 4); (d) the methods by which analyses are to be carried out (reg. 5 and Schedule 2), and the form of certificate of analysis (reg. 6 and Schedule 3).