Characterization of in situ organic matter constituents in vertisols from Argentina, using submicroscopic and cytochemical methods — first report

Stephan, S.; Berrier, J.; Petre, Antonio A. De; Jeanson, C.; Kooistra, M.J.; Scharpenseel, H. W.; Schiffmann, H.

doi:10.1016/0016-7061(83)90054-x

Cited by 14 publications

(6 citation statements)

References 1 publication

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“…Although both soils fit in the same textural class, i.e. silty clay loam, the Vertisol has 4.3% more clay dominated by smectite mineralogy (de Orellana et al, 1997;De Petre and Stephan, 1998;Morrás et al, 1998;Stephan et al, 1983). Thus, PR seems not to depend on the textural class only, thus revealing the crucial role of clay mineralogy on this soil physical property.…”

Section: Soil Penetration Resistancementioning

confidence: 94%

Critical bulk density for a Mollisol and a Vertisol using least limiting water range:

2013

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Section: Soil Penetration Resistancementioning

confidence: 94%

Critical bulk density for a Mollisol and a Vertisol using least limiting water range:

2013

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“…In addition to the above-mentioned objectives we had to explain this 14 C inversion. Figure 2 14 C age of Vertisols (data from Pietig 1973a, 1973b;Arai et al 1996;Stephan et al 1983).…”

Section: Analysis Of Published 14 C Data Of Vertisolsmentioning

confidence: 99%

“…So we can expect that these soils are perhaps older than 5610 years and may hold information on the paleoenvironment of the whole Holocene. Figure 3 Selected examples of 14 C inversion (data from Scharpenseel and Pietig 1973b;Arai et al 1996;Stephan et al 1983 The youngest age of soil OM in the upper part of the microlow is also explained by maximal input of modern OM because of highest biological productivity and deepest root system here, and by additional OM denudation from the gilgai microhighs.…”

Section: Dates In Gilgai Soil Complex North Caucasusmentioning

confidence: 99%

Radiocarbon Age of Vertisols and Its Interpretation Using Data on Gilgai Complex in the North Caucasus

Kovda¹,

Lynn²,

Williams³

et al. 2001

Radiocarbon

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Radiocarbon dates were analyzed to assess Vertisols age around the world. They show an increase of radiocarbon age from mainly modern–3000 BP in 0–100 cm layer up to 10,000 BP at a depth 100–200 cm. Older dates reflect the age of parent material. The inversion of 14C dates seems to be a frequent phenomenon in Vertisols. A series of new dates of Vertisols from gilgai microhigh, microslope and microlow in the North Caucasus was done in order to understand the nature of this inversion. 14C age in the gilgai soil complex ranges from 70 ± 45 BP in the microlow to 5610 ± 180 BP in the microhigh. A trend of similar depths being younger in the microslope and microlow was found. We explain this by intensive humus rejuvenation in the microlows due to water downward flow. The older date in the microhigh represents the old humus horizon sheared laterally close to the surface and preserved by impermeable water regime. We explain inversions of 14C age-depth curves by the sampling procedures. In a narrow pit, genetically different parts of former gilgai could easily be as a genetically uniform soil profile. Because of this strong microvariability, Vertisols require sampling in a trench accounting for gilgai elements, even when gilgai are not obvious.

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“…In Mollisols, SOC is considered one of the main agents that stabilizes soil aggregates (Fabrizzi et al, 2009), whereas in Oxisols, iron and aluminum oxides are the agents responsible for most of the stability of soil aggregates (Dalal and Bridge, 1996;Fabrizzi et al, 2009;Oades, 1993), and in Vertisols, aggregate stability may be attributed mostly to the high clay content, mainly smectite, which protects the SOC (Stephan et al, 1983). This suggests that SOC storage under a high soybean cropping frequency will be quite different depending on the soil type, since soils differ in textural, mineralogical and organic state.…”

Section: Introductionmentioning

confidence: 99%

Impact of soybean cropping frequency on soil carbon storage in Mollisols and Vertisols

2011

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Characterization of in situ organic matter constituents in vertisols from Argentina, using submicroscopic and cytochemical methods — first report

Cited by 14 publications

References 1 publication

Critical bulk density for a Mollisol and a Vertisol using least limiting water range:

Critical bulk density for a Mollisol and a Vertisol using least limiting water range:

Radiocarbon Age of Vertisols and Its Interpretation Using Data on Gilgai Complex in the North Caucasus

Impact of soybean cropping frequency on soil carbon storage in Mollisols and Vertisols

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