Variação das características pedológicas e classificação taxonômica de argissolos derivados de rochas sedimentares

Pedron, Fabrício de Araújo; Samuel‐Rosa, Alessandro; Dalmolin, Ricardo Simão Diniz

doi:10.1590/s0100-06832012000100001

Cited by 7 publications

(4 citation statements)

References 9 publications

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“…The horizon sequence A-E-Bt of the soil profile of the experimental area (Figure 1a), with an abrupt textural change from sandy loam to clay loam, favors the occurrence of surface and subsurface erosion (Pedron et al, 2012). In addition, the presence of a compacted layer around 0.15 m deep ( Figures 5, 6, 7, and 8) and low Ma reduces water infiltration capacity on the A horizon, favoring the occurrence of runoff (Solgi et al, 2014).…”

Section: Potential Environmental Consequences Of Military Vehicle Tramentioning

confidence: 97%

Physical properties of a Brazilian sandy loam soil after the traffic of a military vehicle M113 BR

Barbosa¹,

Pedron²,

Müller³

et al. 2020

Revista Brasileira De Ciência Do Solo

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Soil physical properties can be changed after vehicle traffic, especially by heavy military tracked vehicles. The Santa Maria military Instruction Field, where the experiment was carried out, is currently the most used area for armored tracked vehicles training in Brazil, with the M113 BR being the main equipment. The aim of this study was to determine the effect of the straight line and pivoted traffic intensity of the M113 BR on the physical properties and advancement of the compaction state of an Abruptic Alisol (Argissolo Vermelho-Amarelo Ta Distrófico abrúptico) with military vehicle traffic history. The study was conducted in a completely randomized design, independently evaluating the effect of straight and pivoting traffic in three soil layers (0.00-0.04, 0.10-0.14, and 0.20-0.24 m). For the straight-line traffic, traffic intensities (TI) with one (TI 1), two (TI 2), and five (TI 5) passes on the same trail were evaluated. For the pivoting traffic, TI with one (TI 1P) and two (TI 2P) pivots was evaluated. Both studies had two non-traffic treatments (NT). The soil bulk density, total porosity, macroporosity, microporosity, saturated soil hydraulic conductivity, soil penetration resistance, soil bearing capacity, preconsolidation pressure, and gravimetric water content were analyzed in this study. In the straight-line traffic, cases with no significant differences in TP, Ma, Mi, and Ks prevailed. The highest TP, smallest Bd and largest Mi were observed in the 0.10-0.14 m layer. In the pivoting traffic, one pass was sufficient to increase Bd and decrease TP, Ma, Mi, and Ks in the 0.00-0.04 m layer and the increase from one to two pivotings had a significant difference only in Mi in this same layer. Both types of traffic intensity did not affect the PR in any layer. The Abruptic Alisol, pre-compacted from long-term military training, supported the loads applied by the M113 BR when additional traffic occurred in straight line mode, but not when in pivoting mode. The preconsolidation pressure parameter was not appropriate to assess the ability of the soil to support loads applied by pivoting traffic.

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Section: Potential Environmental Consequences Of Military Vehicle Tramentioning

confidence: 97%

Physical properties of a Brazilian sandy loam soil after the traffic of a military vehicle M113 BR

Barbosa¹,

Pedron²,

Müller³

et al. 2020

Revista Brasileira De Ciência Do Solo

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“…This can deepen knowledge regarding the pedogeomorphological relationships of these soils (Carvalho Junior et al, 2008) and taxonomic interpretation of them by means of numerical classification (Pedron et al, 2012). Multivariate statistical methods can potentially be applied in pedological surveys and in the study of soil properties (Webster and Oliver, 1990;Kravchenko et al, 2002), which would make it possible to predict the occurrence of similar pedons and to delimit the mapping units (Demattê and Garcia, 1999;Demattê and Nanni, 2003;Santos et al, 2015a).…”

Section: Introductionmentioning

confidence: 99%

Pedological Heterogeneity of Soils Developed from Lithologies of the Pirambóia, Sanga-do-Cabral, and Guará Geological Formations in Southern Brazil

Santos

Almeida

Sequinatto

et al. 2017

Rev. Bras. Ciênc. Solo

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ABSTRACT:The source material is one of the factors that most influence soil genesis and the mainly responsible for the nature, composition, and behavior of the soil. Given the geological complexity of the Santa Maria River basin, the objective of this study was to investigate whether the new lithologies described recently may be responsible for a greater variation in soil properties, as well as in the soil taxonomy itself. The study area is located in the municipality of Rosário do Sul, RS, Brazil at 30° 15' 28" S and 54° 54' 50" W, with average altitude of 132 m and climate type Cfa. This study was supported by a cartographic base composed of topographic charts, geological maps, satellite images, digital elevation models, and maps of geomorphometric variables, with the support of GPS receivers and GIS. Topolithosequences were defined from soils developed from the Pirambóia, Sanga-do-Cabral, and Guará Formations, and soil profiles were chosen based on types of source materials, variations in relief, and altitude. A classical model of slope compartmentalization was applied for correlation of the geomorphic surfaces with pedogenesis. Soil profiles were described in a general and morphological manner, and soil samples were collected for analysis. The physical and chemical properties determined were particle size, active and potential acidity, organic C content, Ca . The sum of bases, CEC, flocculation activity and degree of flocculation of the clay fraction, and base (V), aluminum (m), and sodium saturation were calculated. Soil properties were evaluated through factor analysis and grouping, which allowed profiles to be grouped based on their variables and identification of which variables were preponderant in distinguishing them. Furthermore, multivariate analysis allowed statistical differentiation of the profiles in the same lithostratigraphic unit and in different relief positions, and also differentiation of soils developed from different source materials and occupying similar positions in the pedo-landscape, through the formation of homogeneous groups of profiles linked by their degree of similarity.

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“…However, in imperfectly drained soils developed from fine sediments, such as fine sandstone and siltstone/claystone in southern Brazil, soil vertical development is less, reaching depths of approximately 60 to 100 cm (Pedron et al, 2012). Thus, the contact or transition zone between soil and saprolite is more important.…”

Section: Introductionmentioning

confidence: 99%

Boundary between Soil and Saprolite in Alisols in the South of Brazil

Pedron

Oliveira

Dalmolin

et al. 2015

Rev. Bras. Ciênc. Solo

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Despite numerous studies conducted on the lower limit of soil and its contact with saprolite layers, a great deal of work is left to standardize identification and annotation of these variables in the field. In shallow soils, the appropriately noting these limits or contacts is essential for determining their behavior and potential use. The aims of this study were to identify and define the field contact and/or transition zone between soil and saprolite in profiles of an Alisol derived from fine sandstone and siltstone/claystone in subtropical southern Brazil and to subsequently validate the field observations through a multivariate analysis of laboratory analytical data. In the six Alisol profiles evaluated, the sequence of horizons found was A, Bt, C, and Cr, where C was considered part of the soil due to its pedogenetic structure, and Cr was considered saprolite due to its rock structure. The morphological properties that were determined in the field and that were different between the B and C horizons and the Cr layer were color, structure, texture, and fragments of saprolite. According to the test of means, the properties that support the inclusion of the C horizon as part of the soil are sand, clay, water-dispersible clay, silt/clay ratio, macroporosity, total porosity, resistance to penetration, cation exchange capacity, fe extracted by DCB, Al, h+Al, and cation exchange capacity of clay. The properties that support the C horizon as a transition zone are silt, Ca, total organic C, and fe extracted by ammonium oxalate. Discriminant analysis indicated differences among the three horizons evaluated.

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Variação das características pedológicas e classificação taxonômica de argissolos derivados de rochas sedimentares

Cited by 7 publications

References 9 publications

Physical properties of a Brazilian sandy loam soil after the traffic of a military vehicle M113 BR

Physical properties of a Brazilian sandy loam soil after the traffic of a military vehicle M113 BR

Pedological Heterogeneity of Soils Developed from Lithologies of the Pirambóia, Sanga-do-Cabral, and Guará Geological Formations in Southern Brazil

Boundary between Soil and Saprolite in Alisols in the South of Brazil

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