Determination of Soil Microbial Biomass by TOC/TNb Measurement

An important parameter in the site characterization of agricultural cultivation areas is the determination of microbial biomass in soils as well as dissolved organic matter (DOM), which are the basis of the diet of microorganisms. The soil samples are extracted by aqueous salt solutions according to DIN EN ISO 14240-2 “Determination of soil microbial biomass, Part 2: Fumigation-extraction method”. The EOC (extractable organic carbon) or EN (extractable nitrogen) is determined by means of a NPOC/TN measurement.

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