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- W2146543295 abstract "The presence, composition and distribution of ferruginous concretions in the soil, called plinthite and petroplinthites, are conditioned to the environmental characteristics of the region, attributing intrinsic properties to the soil. The objective of this study was to understand the composition of plinthite and petroplinthites, of soils at the Central Depression of Rio Grande do Sul state, Brazil, by the evaluation of chemical and mineralogical characteristics of these features. For this, chemical, morphological and particle size characterization of three soil profiles, was performed. The ferruginous concretions present in some horizons were separated from the soil matrix and submitted, separately to successive procedures for selective extraction of Fe and Al. The horizons of the soils showed a wide variation of textures and chemical attributes such as pH, S, V, m and MO. The levels of Feh, Feo and Fed followed the trend of the soil matrix <plinthite <petroplinthites. Among the oxides of Fe, there was higher incidence of hematite mineral in all samples." @default.
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- W2146543295 date "2013-01-01" @default.
- W2146543295 modified "2023-09-22" @default.
- W2146543295 title "Caracterização de plintitas e petroplintitas em solos da Depressão Central do Rio Grande do Sul Plintites and petroplintites characterization in soils from Central Depression of the Rio Grande do Sul state, Brazil" @default.
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