Methods for determining the organic matter content in soils: is the new always better than the old?

Organic matter present in soils includes both organic residues that have partially preserved their original structure and individual organic compounds of a specific and non-specific nature. In agricultural reclamation, complete fractionation of organic substances is carried out, whereas for geotechnical purposes, only the total organic content is essential. This is an important classification feature; therefore, the methodology for determining organic matter in soils is given increased attention. However, while in soil science the new editions of GOST standards remain within the framework of classical methods recognized by the scientific community, in engineering and geological surveys, and subsequently in soil science, there is a clear tendency to simplified definitions related mainly to pyrolysis of organics at different temperatures. Is it any wonder that as a result of such manipulations, new lithological types of soils such as “peaty marl” appear?