Clay mineralogy and magnetic susceptibility of Oxisols in geomorphic surfaces

Detalhes bibliográficos
Autor(a) principal: Camargo, Livia Arantes
Data de Publicação: 2014
Outros Autores: Marques Júnior, José, Pereira, Gener Tadeu, Bahia, Angélica Santos Rabelo de Souza
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Scientia Agrícola (Online)
Texto Completo: https://www.revistas.usp.br/sa/article/view/85025
Resumo: Studies analyzing the variability of clay minerals and magnetic susceptibility provide data for the delineation of site-specific management areas since many of their attributes are important to agronomy and the environment. This study aimed to evaluate the spatial variability of clay minerals, magnetic susceptibility, adsorbed phosphorus and physical attributes in Oxisols of sandstones in different geomorphic surfaces. For that purpose, soil samples were collected every 25 m along a transect located within the area where the geomorphic surfaces were identified and mapped. The transect occupied the central portion of 500 ha, where it was also sampled for density purposes with one sample per six hectares. Soil samples were collected at a depth of 0.0-0.2 m. The results of the physical, chemical, mineralogical and magnetic susceptibility analyses were subjected to statistical and geostatistical analyses. The nature of the clay minerals and magnetic susceptibility was dependent on the variation of the soil parent material. High values of magnetic susceptibility were associated with the presence of maghemite and magnetite of coarse size. The spatial variability of crystallinity and the content of Fe oxides, as well as magnetic susceptibility, were dependent on the age of the geomorphic surfaces. The youngest surface had greater spatial variability of these attributes. The iron (goethite and hematite) and aluminum (gibbsite) oxides in the youngest geomorphic surface influenced the low values of soil density and high values of total pore volume, micropores and P adsorption. The characterization of the spatial variability of Fe oxides and susceptibility allowed for the delineation of homogeneous areas.
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spelling Clay mineralogy and magnetic susceptibility of Oxisols in geomorphic surfaces Studies analyzing the variability of clay minerals and magnetic susceptibility provide data for the delineation of site-specific management areas since many of their attributes are important to agronomy and the environment. This study aimed to evaluate the spatial variability of clay minerals, magnetic susceptibility, adsorbed phosphorus and physical attributes in Oxisols of sandstones in different geomorphic surfaces. For that purpose, soil samples were collected every 25 m along a transect located within the area where the geomorphic surfaces were identified and mapped. The transect occupied the central portion of 500 ha, where it was also sampled for density purposes with one sample per six hectares. Soil samples were collected at a depth of 0.0-0.2 m. The results of the physical, chemical, mineralogical and magnetic susceptibility analyses were subjected to statistical and geostatistical analyses. The nature of the clay minerals and magnetic susceptibility was dependent on the variation of the soil parent material. High values of magnetic susceptibility were associated with the presence of maghemite and magnetite of coarse size. The spatial variability of crystallinity and the content of Fe oxides, as well as magnetic susceptibility, were dependent on the age of the geomorphic surfaces. The youngest surface had greater spatial variability of these attributes. The iron (goethite and hematite) and aluminum (gibbsite) oxides in the youngest geomorphic surface influenced the low values of soil density and high values of total pore volume, micropores and P adsorption. The characterization of the spatial variability of Fe oxides and susceptibility allowed for the delineation of homogeneous areas. Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz2014-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://www.revistas.usp.br/sa/article/view/8502510.1590/S0103-90162014000300010Scientia Agricola; v. 71 n. 3 (2014); 244-256Scientia Agricola; Vol. 71 Núm. 3 (2014); 244-256Scientia Agricola; Vol. 71 No. 3 (2014); 244-2561678-992X0103-9016reponame:Scientia Agrícola (Online)instname:Universidade de São Paulo (USP)instacron:USPenghttps://www.revistas.usp.br/sa/article/view/85025/87828Copyright (c) 2015 Scientia Agricolainfo:eu-repo/semantics/openAccessCamargo, Livia ArantesMarques Júnior, JoséPereira, Gener TadeuBahia, Angélica Santos Rabelo de Souza2014-09-26T18:01:50Zoai:revistas.usp.br:article/85025Revistahttp://revistas.usp.br/sa/indexPUBhttps://old.scielo.br/oai/scielo-oai.phpscientia@usp.br||alleoni@usp.br1678-992X0103-9016opendoar:2014-09-26T18:01:50Scientia Agrícola (Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Clay mineralogy and magnetic susceptibility of Oxisols in geomorphic surfaces
title Clay mineralogy and magnetic susceptibility of Oxisols in geomorphic surfaces
spellingShingle Clay mineralogy and magnetic susceptibility of Oxisols in geomorphic surfaces
Camargo, Livia Arantes
title_short Clay mineralogy and magnetic susceptibility of Oxisols in geomorphic surfaces
title_full Clay mineralogy and magnetic susceptibility of Oxisols in geomorphic surfaces
title_fullStr Clay mineralogy and magnetic susceptibility of Oxisols in geomorphic surfaces
title_full_unstemmed Clay mineralogy and magnetic susceptibility of Oxisols in geomorphic surfaces
title_sort Clay mineralogy and magnetic susceptibility of Oxisols in geomorphic surfaces
author Camargo, Livia Arantes
author_facet Camargo, Livia Arantes
Marques Júnior, José
Pereira, Gener Tadeu
Bahia, Angélica Santos Rabelo de Souza
author_role author
author2 Marques Júnior, José
Pereira, Gener Tadeu
Bahia, Angélica Santos Rabelo de Souza
author2_role author
author
author
dc.contributor.author.fl_str_mv Camargo, Livia Arantes
Marques Júnior, José
Pereira, Gener Tadeu
Bahia, Angélica Santos Rabelo de Souza
description Studies analyzing the variability of clay minerals and magnetic susceptibility provide data for the delineation of site-specific management areas since many of their attributes are important to agronomy and the environment. This study aimed to evaluate the spatial variability of clay minerals, magnetic susceptibility, adsorbed phosphorus and physical attributes in Oxisols of sandstones in different geomorphic surfaces. For that purpose, soil samples were collected every 25 m along a transect located within the area where the geomorphic surfaces were identified and mapped. The transect occupied the central portion of 500 ha, where it was also sampled for density purposes with one sample per six hectares. Soil samples were collected at a depth of 0.0-0.2 m. The results of the physical, chemical, mineralogical and magnetic susceptibility analyses were subjected to statistical and geostatistical analyses. The nature of the clay minerals and magnetic susceptibility was dependent on the variation of the soil parent material. High values of magnetic susceptibility were associated with the presence of maghemite and magnetite of coarse size. The spatial variability of crystallinity and the content of Fe oxides, as well as magnetic susceptibility, were dependent on the age of the geomorphic surfaces. The youngest surface had greater spatial variability of these attributes. The iron (goethite and hematite) and aluminum (gibbsite) oxides in the youngest geomorphic surface influenced the low values of soil density and high values of total pore volume, micropores and P adsorption. The characterization of the spatial variability of Fe oxides and susceptibility allowed for the delineation of homogeneous areas.
publishDate 2014
dc.date.none.fl_str_mv 2014-06-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://www.revistas.usp.br/sa/article/view/85025
10.1590/S0103-90162014000300010
url https://www.revistas.usp.br/sa/article/view/85025
identifier_str_mv 10.1590/S0103-90162014000300010
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://www.revistas.usp.br/sa/article/view/85025/87828
dc.rights.driver.fl_str_mv Copyright (c) 2015 Scientia Agricola
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2015 Scientia Agricola
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz
publisher.none.fl_str_mv Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz
dc.source.none.fl_str_mv Scientia Agricola; v. 71 n. 3 (2014); 244-256
Scientia Agricola; Vol. 71 Núm. 3 (2014); 244-256
Scientia Agricola; Vol. 71 No. 3 (2014); 244-256
1678-992X
0103-9016
reponame:Scientia Agrícola (Online)
instname:Universidade de São Paulo (USP)
instacron:USP
instname_str Universidade de São Paulo (USP)
instacron_str USP
institution USP
reponame_str Scientia Agrícola (Online)
collection Scientia Agrícola (Online)
repository.name.fl_str_mv Scientia Agrícola (Online) - Universidade de São Paulo (USP)
repository.mail.fl_str_mv scientia@usp.br||alleoni@usp.br
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