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- W4211026445 abstract "Redoximorphic features are formed by the reduction, translocation and oxidation of iron and manganese compounds in the soil after water saturation and desaturation, respectively. Although these features can be studied under the microscope, they are also visible in hand samples. In thin sections, redoximorphic features can be categorised into three groups: intrusive redox pedofeatures, impregnative redox pedofeatures and depletion redox pedofeatures. Hand samples fall into three distinct groups: redox depletions, redox concentrations and reduced matrices. Impregnative redox pedofeatures are zones where oxidised Fe and/or Mn have accumulated in the matrix as nodules or as Fe/Mn oxide hypo- or quasicoatings along voids. Depletion redox pedofeatures are zones where Fe/Mn oxides and/or clay have been removed, because of the reduction of Fe/Mn and subsequent mobilisation of these elements, or are associated with the loss of clay (clay depletions). Redoximorphic features are used to determine the depth to seasonal water saturation and also to identify anaerobic soils. The percentage of redoximorphic features in wetland soils has been related to the frequency and duration of saturation which are expensive and time-consuming to measure. Short duration of water saturation or rapid fluctuation of water table levels results in intrapedal Fe/Mn oxide nodules and hypocoatings. As the duration of water saturation increases to a few weeks, the type and pattern of redox pedofeature changes from only impregnative to both impregnative and depletion-related pedofeatures. Under long duration (many weeks to months) of water saturation and reduction, Fe oxide depletion pedofeatures occupy the entire groundmass. Relict redoximorphic features are those that have stopped forming in the soil horizon in which they now occur or were inherited from the parent material. The presence of a diffuse boundary of a nodule is often considered to be indicative of contemporary development. A sharp boundary suggests the feature is no longer forming. If the redoximorphic feature is related to current structural voids, it is likely to be pedogenic in origin and formed in situ but not necessarily currently forming. Because redoximorphic features are common in most soils where water saturation occurs, their presence is used extensively in making land use decisions related to on-site waste disposal and wetlands." @default.
- W4211026445 created "2022-02-13" @default.
- W4211026445 creator A5002472522 @default.
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- W4211026445 date "2018-01-01" @default.
- W4211026445 modified "2023-10-05" @default.
- W4211026445 title "Redoximorphic Features" @default.
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- W4211026445 doi "https://doi.org/10.1016/b978-0-444-63522-8.00015-2" @default.
- W4211026445 hasPublicationYear "2018" @default.
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