The Fertilisers (Sampling and Analysis) Regulations (Northern Ireland) 1991 No. 540

SCHEDULE 2 METHODS OF ANALYSIS

PART I

3.    Methods of Analysis

a Determination of nitrate and ammoniacal nitrogen-Ulsch method

b determination of nitrate and ammoniacal nitrogen-Arnd method

c Determination of nitrate and ammoniacal nitrogen-Devarda method