Origins of humus variation

Humus Composition and Transformations in a Pergelic Cryohemist of Coastal Antarctica

“…On the other hand the synthesis of these compounds is also possible from ketonic and carboxylic structures (Ziechmann, 1980). The occurrence of aromatic constituents in SOM of an Antarctic Histosol is in line with results of Wilson et al (1986), who found aromatics in humic acid fractions of Antarctic soils.…”

“…Usually, analyses of organic matter in Antarctic soils are confined only to the loss on ignition and the determination of organic carbon and nitrogen (Campbell and Claridge, 1987). Only Wilson et al (1986) and Wilson (1990) have investigated Antarctic mosses and soil humic acids by 13C-NMR spectroscopy.…”

Chemical characterization of microbial-dominated soil organic matter in the Garwood Valley, Antarctica

“…However, vascular plants and mosses are known to contain polyphenolic compounds (Erickson and Miksche, 1974;Miksche and Yasuda, 1978;Kö gel-Knabner, 2002). The absence of polyphenolic signals in the soil NaOH extracts (2-D NMR; data not shown) confirms that vascular plants and mosses were not an important source of the OM in the Garwood Valley soils (Wilson et al, 1986).…”

The chemical composition of soil organic matter in classical humic compound fractions and in bulk samples — a review

“…This point of view has changed since the development and application of the non-destructive methods for humic substance characterization (Schulten, 1984;Schulten et al, 1987;Wilson, 1981;Stevenson, 1994). For example, Wilson et al (1986) by means of NMR spectroscopy showed aromatic signals in soil samples of Antarctica despite no lignin in the litter fraction.…”