BS 5551-4.1.1 81st Edition, November 30, 1981
Fertilizers Part 4: Chemical Analysis Section 4.1: Determination of Nitrogen Subsection 4.1.1: Nitron Gravimetric Method for Determination of Nitrate Nitrogen
Includes all amendments and changes through Reaffirmation Notice , February 15, 1996
Additional Comments: W/D NO S/S
Published By:British Standards Institution (BSI)
Reference method applicable to all fertilizers.