90.20 Standard under periodical review Jul 15, 2026
ISO
ISO/TC 190/SC 3 Chemical and physical characterization
International Standard
13.080.10 Chemical characteristics of soils
Published
Specifies a method for the determination of the total nitrogen (ammonium-N, nitrate-N, nitrite-N and organic N) content of a soil. Nitrogen in N-N-linkages, N-O-linkages and some heterocyclics (especially pyridine) is only partially determined. Applicable to all types of soils.
PUBLISHED
ISO 11261:1995
90.20
Standard under periodical review
Jul 15, 2026