Radiocarbon dating pedogenic carbonates

Originally, it was thought that SIC required centuries to accumulate [27,28].Pedogenic carbonates were extensively studied in different types of soils primarily in various landscape positions [29,30].The proportion of pedogenic carbonates was highly variable: in the native grassland, it was 27% (C-horizon); in the continuous fallow, it varied from 53% (Bk1-horizon) to 72% (C2-horizon); and in the cropland, it varied from 85% (A-horizon) to 10% (Ck-horizon).The radiocarbon age differences with depth among the soils reflect changes in the soil carbon dynamics resulting from cultivation.Porous surfaces indicate later dissolution of the pendants, which continues even to the lowermost part.

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Two of these pendants were selected for stable carbon (δ plants with temporary dominances of the latter.

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