90.20 Standard under periodical review Jan 15, 2025
ISO
ISO/TC 190/SC 4 Biological characterization
International Standard
13.080.30 Biological properties of soils
Published
Gives a method for the determination of microbial biomass of soils by measurement of total extractable organic biomass material mainly from freshly killed microorganisms. It is also applicable to the estimation of microbial nitrogen and ninhydrin-reactive nitrogen in soil.
PUBLISHED
ISO 14240-2:1997
90.20
Standard under periodical review
Jan 15, 2025