This part of ISO 14240 specifies a method for the determination of the active aerobic, heterotrophic microbial biomass in aerated agricultural and mineral soils.Determination of the effects of chemicals on biomass is outside the scope of this part of ISO 14240.
DS/EN ISO 14240-1:2011 history
2011DS/EN ISO 14240-1:2011 Soil quality - Determination of soil microbial biomass - Part 1: Substrate-induced respiration method