This study aims to review and integrate the determining factors and mechanisms of soil organic matter (SOM) stabilisation in andic compared with other (non-andic) soil types. The AA. have reviewed recent literature regarding the nature of SOM
and its stabilisation processes in the top- and sub-soil to address and discuss the interaction between the SOM and the mineral phase. The carbon (C) storage capacity by the metal-humus-complex formation of volcanic soils is also evaluated. The most
important stabilisation processes are related to the incorporation and decomposition of microbial-derived C along with the changing C storage capacity with increasing soil development. The priming and destabilisation of adsorbed SOM are crucial mechanisms
influencing the soil C sequestration in subsoils. Al and Fe oxides are the main stabilising agents in andic soils. The influence of climate, mineralogy and soil disturbances on the SOM storage capacity of andic soils also require further attention.
The aim of this study was to evaluate the potential of multi-spectral aerial imagery and topographic information for assessing topsoil organic matter (SOM) content based on detailed surveys carried out in 2 spatially and geologically independent
Danish fields. The results show that the spectral reflectance data obtained within the visible and near infrared range are correlated with the SOM content in both fields, and that the spectral bands are almost co-linear. The results also revaled
that the data used in the investigation were insufficient to properly describe the variations of SOM within the fields.
Focusing on pyrogenic organic matter (PyOM), the AA. investigated an altitudinal soil sequence on Mount Etna, Italy, ranging from 500 m to 1800 m asl, where the fire frequency is assumed to have been higher at lower elevations due to a warmer
and drier climate. They evaluated the effect of fire on the chemical and physical characteristics of SOM along the altitudinal sequence. At 2 sites at a similar altitude but having a different recent fire history, they also examined the effect of fire
frequency on SOM. It is shown that fire is an important but not the only factor controlling SOM dynamics.
This paper presents that the mean age of phytoliths and soil organic matter (SOM) in the uppermost 2.6 m of a latosol in central southern Brazil increases with depth in a regular, quantifiable fashion. The mean age of particles at each level results
from a balance between continuous translocation and selective dissolution. The AA. then examine the reliability of paleovegetation records inferred from soil phytolith assemblages and SOM carbon-isotope analysis by comparison with pollen and charcoal
Fragment av medeltidens kulturlandskap Lantmäterihandlingar som källa till studiet av samhällsforändringar. (Fragment de paysage humanisé médiéval Les actes au service cadastral comme sources de l'étude des changements sociaux)
Here, the AA. show undisturbed soil development, i.e. the processes of weathering and accumulation of soil organic matter (SOM), by comparing pristine with grazed sites in the high Andes (4500 m) of southern Peru. Plots with pristine vegetation were
temperatures and soil acidification. Both factors increased weathering in rangeland soils. Formation of pedogenic oxides with high surface area explained preservation of SOM, with positive feedback to acidification. With this work, the AA. present a conceptual
framework of positive feedback links between human-induced vegetation change, soil development and accumulation of SOM, which is only possible due to the unique baseline values of a pristine ecosystem.
The AA. focused on : (1) using of the laboratory-based, proximally sensed in the visible-near-infrared (Vis-NIR, 400-2500 nm) spectral range to predict SOM content in the study area; (2) combining soil spectroscopy and geostatistics for mapping SOM
content; (3) mapping zones affected by water erosion processes in the study area; and (4) analyzing the relationship among soil erosion, SOM and soil spectral data. The study was performed in the Turbolo catchment, located in northern Calabria. Areas
were used as validation set. The optimum number of factors to retain in the calibration model was determined by cross validation. The results showed that zones with low content of SOM are affected by water erosion processes.
Recent research on the contribution of soil erosion on agricultural land to atmospheric carbon dioxide (CO2) emphasizes either the contribution of soil organic matter (SOM) mineralization during transport as source for atmospheric CO2, or the deep
burial of SOM-rich sediment in agricultural landscapes as a sink. The contribution of either process is subject to a controversial debate. In this letter, the AA. present preliminary results on their research on interrill carbon (C) erosion, SOM transport
The AA. investigated the potential effect of permafrost thawing by the analysis of the physical-chemical soil properties of permafrost versus non-permafrost sites. Specifically, they 1) quantified the SOM stocks at such sites, 2) characterised SOM
was verified) were investigated in detail. It is confirmed that different decomposition processes occur between permafrost and non-permafrost sites. The results suggest that a warmer climate may not necessarily lead to an increased CO2 release from SOM