Caracterização e classificação de solos graníticos em topossequência na região Sul do Brasil

Medeiros, Paula Suélen de Departamento de Solos Corrêa; Nascimento, Paulo César do; Inda, Alberto Vasconcellos; Silva, Diego Silva da Departamento de Solos

doi:10.1590/s0103-84782013000700011

Cited by 9 publications

(6 citation statements)

References 9 publications

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“…However, unlike the original survey, recent studies have shown that Inceptisols tend to occur under very specific topographic conditions, occupying narrow bands between Ultisols and Lithic Udorthents. In a study of the soils of Extrema Hill, in Porto Alegre, Medeiros et al (2013) described the occurrence of Ultisols in places where the soil-landscape relationship would suggest the presence of Inceptisols, indicating that in the region, these soils occupy narrow zones of transition between Ultisols and Lithic Udorthents. Along the toposequence studied, these authors described the occurrence of three Ultisols, one Lithic Udorthent, and no Inceptisol.…”

Section: Resultsmentioning

confidence: 99%

Spatial Disaggregation of Multi-Component Soil Map Units Using Legacy Data and a Tree-Based Algorithm in Southern Brazil

Machado

Giasson

Campos

et al. 2018

Rev. Bras. Ciênc. Solo

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Soil surveys often contain multi-component map units comprising two or more soil classes, whose spatial distribution within the map unit is not represented. Digital Soil Mapping tools supported by information from soil surveys make it possible to predict where these classes are located. The aim of this study was to develop a methodology to increase the detail of conventional soil maps by means of spatial disaggregation of multi-component map units and to predict the spatial location of the derived soil classes. Three digital maps of terrain variables -slope, landforms, and topographic wetness indexwere correlated with the soil map and 72 georeferenced profiles from the Porto Alegre soil survey. Explicit rules that expressed regional soil-landscape relationships were formulated based on the resulting combinations. These rules were used to select typical areas of occurrence of each soil class and to train a decision tree model to predict the occurrence of individualized soil classes. Validation of the soil map predictions was conducted by comparison with available soil profiles. The soil map produced showed high agreement (80.5 % accuracy) with the soil classes observed in the soil profiles; Ultisols and Lithic Udorthents were predicted with greater accuracy. The soil variables selected in this study were suitable to represent the soil-landscape relationships, suggesting potential use in future studies. This approach developed a more detailed soil map relevant to current demands for soil information and has potential to be replicated in other areas in which data availability is similar.

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Section: Resultsmentioning

confidence: 99%

Spatial Disaggregation of Multi-Component Soil Map Units Using Legacy Data and a Tree-Based Algorithm in Southern Brazil

Machado

Giasson

Campos

et al. 2018

Rev. Bras. Ciênc. Solo

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“…The highest values of these attributes were found in profiles 2 and 7, the same profiles that had higher clay contents (Table 3). Profiles 3, 5, and 6 had a high degree of weathering and the other profiles had soils with a low degree of weathering in their formation, highlighting profiles 2 and 7 because they had higher Ki values (Medeiros, Nascimento, Inda, & Silva, 2013).…”

Section: Elemental Analysis and Weatheringmentioning

confidence: 93%

Agricultural potential and soil use based on the pedogenetic properties of soils from the cerrado-caatinga transition

Ratke¹,

Campos²,

Inda³

et al. 2020

SCA

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The sustainable use of soil requires a broad knowledge of its genesis, morphology, properties, and distribution in the landscape. Thus, the objective of this study was to characterize the pedogenetic attributes of representative soils from the cerrado-caatinga transition of the Gurguéia river basin to indicate their agricultural potential and limitations for the implementation of agroforestry systems. National and international soil classification systems were used to define the soil classes. The limiting factors and agricultural potential were characterized following the evaluation system of the agricultural potential of Brazilian land. In general, profiles 1, 3, 5, and 6 had a low nutrient budget and a sandy to loam texture. Profiles 2, 4, and 7 showed high clay content and nutrient budget. The soil profiles were classified as Ustic Quartzipsamments, Udic Haplusterts, Xanthic Haplustox, Arenic Kanhaplustults, Typic Haplustox, and Aridic Dystrustept based on their pedogenetic characteristics. Udic Haplusterts and Arenic Kanhaplustults soils display restrictions regarding the planting of forests owing to oxygen and soil depth limitations. The other soil classes had adequate physical properties for the implementation of agricultural systems and pastures, including good drainage and medium texture; however, they had low natural fertility, and thus require technologies for soil acidity correction and fertilization. Ustic Quartzipsamments and Ustic soils require the implementation of conservation systems, such as agroforestry, to avoid degradation.

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“…The high Ki index in P3 reinforces this hypothesis, given the fact that the silt and sand fractions have significant participation in soil texture. Remarks of this condition were cited in Rolim Neto et al (2009), Medeiros et al (2013), and Nascimento, Lani and Zoffoli (2013).…”

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confidence: 86%

“…Agrotec., Lavras, v. 39, n. 5, p. 477-487, set./out., 2015 Brazilian System of Soil Classification (EMBRAPA, 2013), the occurrence of Argissolo on top and slope of hills with gently sloping relief; Cambissolo and Neossolo in granitic hills with moderately steep and steep relief; and Hydromorphic/Aluvial soils in low and floodplain areas. The steep relief of hill areas contributes to the formation of thinner soil and chemical characteristics which reflect a low weathering degree (Medeiros et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Soil Variability in Different Landscape Positions in the Porto Alegre Botanical Garden, Southern Brazil

et al. 2015

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Knowledge of soil characteristics in areas where activities related to the environment are developed, such as Porto Alegre Botanical Garden (JB-PoA), is a fundamental condition for the sustainable use of this natural resource. The objective of this study was to characterize, classify and evaluate some issues about soil formation in Porto Alegre Botanical Garden, as well as relate their distribution on the landscape according to environmental characteristics. For the morphological description and collecting samples four profiles were selected (P1 to P4), located in the summit-shoulder transition, backslope, footslope and toeslope, respectively. Granulometric distribution of the P1 and P3 profiles indicated sharp textural gradient, with presence of textural and "plânico" B horizons, respectively, according to Brazilian System of Soil Classification. There is predominance of low values of pH, and low base saturation, with exception of P4, indicating probable deposition of solution material at this area. The Fed/Fes relationship was greater in the profile located in the summit-shoulder transition (P1), indicating higher weathering. The Feo/Fed relationship increased in P3 and P4 profiles, indicating greater participation of iron oxides of low crystallinity in reducing environment. The occurrence of some pedogenic processes may be inferred, like lessivage in P1 (Ultic Hapludalf), due to clay skins and higher values of fine clay:total clay relationship in subsurface; ferrolysis and gleization, by low pH value and high Feo/Fed relationship in E and EB horizons of P3 (Oxyaquic Hapludalf), being the last also present in P4 (Humaqueptic Endoaquent), indicating gleization occurrence.

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Caracterização e classificação de solos graníticos em topossequência na região Sul do Brasil

Cited by 9 publications

References 9 publications

Spatial Disaggregation of Multi-Component Soil Map Units Using Legacy Data and a Tree-Based Algorithm in Southern Brazil

Spatial Disaggregation of Multi-Component Soil Map Units Using Legacy Data and a Tree-Based Algorithm in Southern Brazil

Agricultural potential and soil use based on the pedogenetic properties of soils from the cerrado-caatinga transition

Soil Variability in Different Landscape Positions in the Porto Alegre Botanical Garden, Southern Brazil

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