Magnetic Susceptibility of Soil to Differentiate Soil Environments in Southern Brazil

Ramos, Priscila Vogelei; Dalmolin, Ricardo Simão Diniz; Júnior, José Marques; Siqueira, Diego Silva; Almeida, Jaime Antônio de; Moura-Bueno, Jean Michel

doi:10.1590/18069657rbcs20160189

Cited by 22 publications

(16 citation statements)

References 33 publications

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“…The χ lf values are consistent with those observed by other authors for Fe-rich Oxisols Rhodic in Brazil derived from mafic rocks (Costa et al, 1999;Ramos et al, 2017;Camêlo et al, 2018). Their variations are mainly related to the type of parent material (Lu, 2000;Camêlo et al, 2018) and pedogenesis (Hanesch et al, 2007;Lu et al, 2008;Camêlo et al, 2018), as well as pedoenvironmental conditions (Lu, 2000;Poggere et al, 2018;Camêlo et al, 2018).…”

Section: Magnetic Studysupporting

confidence: 90%

“…Rhodic Oxisols exhibit strong magnetic attraction due to high contents of ferrimagnetic Fe oxides (maghemite and magnetite) (Costa et al, 1999(Costa et al, , 2014Camêlo et al, 2018;Poggere et al, 2018). These minerals have often been used in studies on pedogenesis (Silva et al, 2017;Camêlo et al, 2018) for stratification of environments (Ramos et al, 2017) and soil fertility (Costa et al, 2018) in Brazil and elsewhere in the world.…”

Section: Introductionmentioning

confidence: 99%

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Mineralogical Evolution of Magnetic Rhodic Oxisols under Different Lithological Influences in Brazil

FILHO

Ker

Fontes

et al. 2019

Rev. Bras. Ciênc. Solo

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Ferrimagnetic Fe-oxides are important soil components, which are present in most of the agricultural soils of Brazil. Distinction, origin, and assessment of the influence of these minerals on magnetism and geochemistry is a challenge for mineralogists. This study aimed to characterize mineralogically Fe-rich Rhodic Oxisols (Latossolos Vermelhos) originating from several mafic rocks in Brazil, and assess the implications on their magnetic and geochemical properties. We present results on magnetic measurements, chemical dissolutions, X-ray diffractometry, Rietveld refinement, Raman, and Mössbauer spectroscopies of Fe-rich Rhodic Oxisols originating from several mafic rocks. They show that magnetite is inherited from the parent material, and its oxidation leads to the formation of maghemite. In the coarse fractions (sand and silt), magnetite and maghemite coexist and are interstratified with hematite, confirmed by Raman spectroscopy. This limited the distinction between magnetite and maghemite by Mössbauer spectroscopy. Maghemite represents the only ferrimagnetic Fe oxide in the clay fraction. The influence of both ferrimagnetic minerals, magnetite and maghemite, on magnetic susceptibility and total content of trace elements is determined by the pedogenic development, even among highly weathered soils. In general, the coarse fractions contribute with most of the total trace element contents, while the clay fraction contributes to trace elements availability and magnetic susceptibility of soils.

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Section: Magnetic Studysupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Mineralogical Evolution of Magnetic Rhodic Oxisols under Different Lithological Influences in Brazil

FILHO

Ker

Fontes

et al. 2019

Rev. Bras. Ciênc. Solo

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“…The presence of ferromagnetic iron in the molecular structure of clays seems to be determinant for the expression of MS. The results reported by Ramos et al (2017), emphasized that magnetism is most evident in clayey soils. Among the ferromagnetic minerals, magnetite is more easily found in coarser soil fractions, such as sand and silt, whereas maghemite is mostly found in finer fractions, such as clay.…”

Section: The Relationship Between the Figures Displayed Inmentioning

confidence: 93%

“…Numerous studies pointed out that the measurement of magnetic susceptibility can be very useful in the identification of properties related with factors and processes of soil formation, applied to soil mapping (Ramos et al, 2017). Magnetic susceptibility became popular in soil-related researches including paleoclimatic field studies (Huang et al, 2006; Chondular, respectively, being both sites in the tropical dry forest ecological zone.…”

Section: Introductionmentioning

confidence: 99%

“…sugarcane harvested with and without previous burning, indicating the changes in soil quality. Ramos et al (2017) reported that the limits indicated by a spatial boundary analysis based on MS values were effective to outline representative compartments of pedogenetic environments on the study area. Thus, the use of MS enables soil characterization to replace costly and timeconsuming chemical and mineralogical soil analysis (Camargo et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Relación entre propiedades físicas y la susceptibilidad magnética en dos suelos del Valle del Cauca

Jiménez¹,

Benavides²,

Ospina-Salazar³

et al. 2017

rcia

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La susceptibilidad magnética (SM) es una propiedad que determina el grado de magnetización de un material de acuerdo con su composición, dado su potencial en el diagnóstico de suelos agrícolas. Con el objetivo de evaluar la aplicabilidad de este atributo en el análisis físico de suelos, se determinó su correlación con algunas propiedades físicas en suelos del Valle del Cauca. Se realizaron muestreos en dos lotes de caña de azúcar (Chondular y Santa Rosa), de 55 y 98 hectáreas, respectivamente. Los datos se analizaron por estadísticos descriptivos, así como por matriz de correlación espacial y Pearson entre SM y las propiedades físicas del suelo, a través de un software de sistemas de información geográfica. Se encontraron correlaciones espaciales altas entre SM y las propiedades analizadas, particularmente con arenas y arcillas (0,9 y -0,88, respectivamente, P<0,001) en el lote Chondular, aunque también se encontraron correlaciones superiores al 50% con capacidad de campo, conductividad térmica, densidad aparente y espacio poroso total. Por otra parte, las correlaciones de SM fueron más bajas en el lote Santa Rosa, siendo las más relevantes del orden de 0,59 y -0,65 (P<0,005) para arenas y arcillas en su orden. Estas diferencias de correlación se atribuyeron a alteraciones por labranza del suelo en el lote Santa Rosa. De acuerdo con lo anterior, la determinación de SM y su correlación espacial con algunas propiedades físicas de suelos agrícolas, es una técnica que podría simplificar su caracterización, particularmente la proporción de arenas y arcillas.

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Magnetic susceptibility in the prediction of soil attributes in southern Brazil

Ramos

Inda

Barrón

et al. 2021

Soil Science Soc of Amer J

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Global demand for soil information has led to investigations that have adopted ways to estimate soil attributes quickly and effectively. In this context, magnetic susceptibility (χ) has gained prominence because it is a technique capable of estimating other attributes that are more difficult to acquire. This study aimed to (a) evaluate the performance of χ for the prediction of sand, silt, clay, hue, hematite/(hematite + goethite) ratio, Fe content of pedogenic iron oxides, and remaining phosphorus and (b) develop maps of χ, soil attributes and attributes predicted by χ in the state of Rio Grande do Sul (RS), Brazil. Here, 198 soil samples under forest and native pasture were used for testing the potential of χ as a predictive technique, separating the data into calibration (nc = 149) and validation sets (nv = 49). Linear regression was used to obtain the pedotransfer equations according to soil classes and lithology. To visualize the distribution of the values of χ and other soil attributes in RS, maps were made with the real values of χ and the real and estimated values of soil attributes. The great range of the χ values and related attributes was associated with the lithological and pedological influence, allowing the construction of predictive models that encompass a large gradient of χ. In the predictions made in groups, the attributes of Oxisols and Ultisols were best estimated by χ; however, among the lithology groups, the extrusive igneous rocks stood out.

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Magnetic Susceptibility of Soil to Differentiate Soil Environments in Southern Brazil

Cited by 22 publications

References 33 publications

Mineralogical Evolution of Magnetic Rhodic Oxisols under Different Lithological Influences in Brazil

Mineralogical Evolution of Magnetic Rhodic Oxisols under Different Lithological Influences in Brazil

Relación entre propiedades físicas y la susceptibilidad magnética en dos suelos del Valle del Cauca

Magnetic susceptibility in the prediction of soil attributes in southern Brazil

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