Use of spectral data for estimating the relationship between iron oxides and 2:1 minerals with their respective reflectances
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Semina. Ciências Agrárias (Online) |
Texto Completo: | https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/10541 |
Resumo: | Iron oxides and 2:1 minerals have a strong influence on the spectral behavior of soils. However, studies that address more deeply the relationship between them and their reflectances are scarce. Thus, the objective of this study was to estimate the relationship between iron oxides and 2:1 minerals with their reflectance factors, and assess whether such a relationship presents a linear behavior. The experimental design was completely randomized with four replicates per treatment. The spectral readings of the samples of hematite, goethite, magnetite and bentonite were performed using the equipment FieldSpec jr 3, which covers the spectral range from 350 to 2500 nm. After the readings, were chosen the intervals that best represented the minerals and performed statistical analysis from the average reflectance factors found in these points. The results showed that the hematite, goethite and magnetite have nonlinear relationship with their reflectance factors, while bentonite has not only linear relationship in the range studied, but in the entire area covered by the equipment. Thus, we conclude that relatively small amounts of iron oxides are able to affect soil reflectance in the same way that amounts close to 100%. With respect to mineral 2:1 concludes that the increase in the proportion of them in a certain class of soil leads to a progressive decrease of the reflectance factor across the entire spectrum-optical, as described for other elements. |
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Semina. Ciências Agrárias (Online) |
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Use of spectral data for estimating the relationship between iron oxides and 2:1 minerals with their respective reflectancesUso de dados espectrais para estimar a relação entre óxidos de ferro e minerais 2:1 com suas respectivas reflectânciasCiência do soloSpectral behaviorX-rayAlbedoRemote sensing.Comportamento espectralRaios-xAlbedoSensoriamento remoto.Ciência do soloIron oxides and 2:1 minerals have a strong influence on the spectral behavior of soils. However, studies that address more deeply the relationship between them and their reflectances are scarce. Thus, the objective of this study was to estimate the relationship between iron oxides and 2:1 minerals with their reflectance factors, and assess whether such a relationship presents a linear behavior. The experimental design was completely randomized with four replicates per treatment. The spectral readings of the samples of hematite, goethite, magnetite and bentonite were performed using the equipment FieldSpec jr 3, which covers the spectral range from 350 to 2500 nm. After the readings, were chosen the intervals that best represented the minerals and performed statistical analysis from the average reflectance factors found in these points. The results showed that the hematite, goethite and magnetite have nonlinear relationship with their reflectance factors, while bentonite has not only linear relationship in the range studied, but in the entire area covered by the equipment. Thus, we conclude that relatively small amounts of iron oxides are able to affect soil reflectance in the same way that amounts close to 100%. With respect to mineral 2:1 concludes that the increase in the proportion of them in a certain class of soil leads to a progressive decrease of the reflectance factor across the entire spectrum-optical, as described for other elements.Os óxidos de ferro e os minerais 2:1 possuem forte influência sobre o comportamento espectral dos solos. No entanto, estudos que abordem de maneira mais profunda a relação entre ambos e suas respectivas reflectâncias são escassos. Desta forma, o objetivo deste trabalho foi de estimar a relação entre óxidos de ferro e minerais 2:1 com seus respectivos fatores de reflectância, e avaliar se tal relação apresenta comportamento linear. O delineamento utilizado foi inteiramente casualizado com 4 repetições por tratamento. As leituras espectrais das amostras de hematita, goethita, magnetita e bentonita foram realizadas por meio do equipamento FieldSpec 3 jr, o qual recobre a faixa espectral de 350 a 2500 nm. Após as leituras, foram escolhidos os intervalos que melhor representavam os minerais e realizaram-se as análises estatísticas a partir dos fatores de reflectância médios encontrados nestes pontos. Os resultados mostraram que a hematita, goethita e magnetita apresentam relação não linear com seus respectivos fatores de refletância, enquanto que a bentonita apresenta relação linear não só no intervalo estudado, mas em toda faixa coberta pelo equipamento. Desta maneira, conclui-se que quantidades relativamente pequenas destes óxidos de ferro são capazes de afetar a reflectância do solo da mesma forma que quantidades próximas de 100%. Com relação aos minerais 2:1 conclui-se que o aumento na proporção dos mesmos em uma determinada classe de solo leva a uma queda progressiva do fator de reflectância em todo o espectro-óptico, assim como descrito para outros elementos.UEL2013-08-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionPesquisa de laboratórioPesquisa de laboratórioapplication/pdfhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/1054110.5433/1679-0359.2013v34n4p1479Semina: Ciências Agrárias; Vol. 34 No. 4 (2013); 1479-1492Semina: Ciências Agrárias; v. 34 n. 4 (2013); 1479-14921679-03591676-546Xreponame:Semina. Ciências Agrárias (Online)instname:Universidade Estadual de Londrina (UEL)instacron:UELporhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/10541/pdfCopyright (c) 2013 Semina: Ciências Agráriashttp://creativecommons.org/licenses/by-nc/4.0info:eu-repo/semantics/openAccessCezar, EversonNanni, Marcos RafaelChicati, Marcelo LuizSouza Júnior, Ivan Granemann deCosta, Antônio Carlos Saraiva da2023-01-16T16:20:27Zoai:ojs.pkp.sfu.ca:article/10541Revistahttp://www.uel.br/revistas/uel/index.php/semagrariasPUBhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/oaisemina.agrarias@uel.br1679-03591676-546Xopendoar:2023-01-16T16:20:27Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL)false |
dc.title.none.fl_str_mv |
Use of spectral data for estimating the relationship between iron oxides and 2:1 minerals with their respective reflectances Uso de dados espectrais para estimar a relação entre óxidos de ferro e minerais 2:1 com suas respectivas reflectâncias |
title |
Use of spectral data for estimating the relationship between iron oxides and 2:1 minerals with their respective reflectances |
spellingShingle |
Use of spectral data for estimating the relationship between iron oxides and 2:1 minerals with their respective reflectances Cezar, Everson Ciência do solo Spectral behavior X-ray Albedo Remote sensing. Comportamento espectral Raios-x Albedo Sensoriamento remoto. Ciência do solo |
title_short |
Use of spectral data for estimating the relationship between iron oxides and 2:1 minerals with their respective reflectances |
title_full |
Use of spectral data for estimating the relationship between iron oxides and 2:1 minerals with their respective reflectances |
title_fullStr |
Use of spectral data for estimating the relationship between iron oxides and 2:1 minerals with their respective reflectances |
title_full_unstemmed |
Use of spectral data for estimating the relationship between iron oxides and 2:1 minerals with their respective reflectances |
title_sort |
Use of spectral data for estimating the relationship between iron oxides and 2:1 minerals with their respective reflectances |
author |
Cezar, Everson |
author_facet |
Cezar, Everson Nanni, Marcos Rafael Chicati, Marcelo Luiz Souza Júnior, Ivan Granemann de Costa, Antônio Carlos Saraiva da |
author_role |
author |
author2 |
Nanni, Marcos Rafael Chicati, Marcelo Luiz Souza Júnior, Ivan Granemann de Costa, Antônio Carlos Saraiva da |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Cezar, Everson Nanni, Marcos Rafael Chicati, Marcelo Luiz Souza Júnior, Ivan Granemann de Costa, Antônio Carlos Saraiva da |
dc.subject.por.fl_str_mv |
Ciência do solo Spectral behavior X-ray Albedo Remote sensing. Comportamento espectral Raios-x Albedo Sensoriamento remoto. Ciência do solo |
topic |
Ciência do solo Spectral behavior X-ray Albedo Remote sensing. Comportamento espectral Raios-x Albedo Sensoriamento remoto. Ciência do solo |
description |
Iron oxides and 2:1 minerals have a strong influence on the spectral behavior of soils. However, studies that address more deeply the relationship between them and their reflectances are scarce. Thus, the objective of this study was to estimate the relationship between iron oxides and 2:1 minerals with their reflectance factors, and assess whether such a relationship presents a linear behavior. The experimental design was completely randomized with four replicates per treatment. The spectral readings of the samples of hematite, goethite, magnetite and bentonite were performed using the equipment FieldSpec jr 3, which covers the spectral range from 350 to 2500 nm. After the readings, were chosen the intervals that best represented the minerals and performed statistical analysis from the average reflectance factors found in these points. The results showed that the hematite, goethite and magnetite have nonlinear relationship with their reflectance factors, while bentonite has not only linear relationship in the range studied, but in the entire area covered by the equipment. Thus, we conclude that relatively small amounts of iron oxides are able to affect soil reflectance in the same way that amounts close to 100%. With respect to mineral 2:1 concludes that the increase in the proportion of them in a certain class of soil leads to a progressive decrease of the reflectance factor across the entire spectrum-optical, as described for other elements. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-08-30 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Pesquisa de laboratório Pesquisa de laboratório |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/10541 10.5433/1679-0359.2013v34n4p1479 |
url |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/10541 |
identifier_str_mv |
10.5433/1679-0359.2013v34n4p1479 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/10541/pdf |
dc.rights.driver.fl_str_mv |
Copyright (c) 2013 Semina: Ciências Agrárias http://creativecommons.org/licenses/by-nc/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2013 Semina: Ciências Agrárias http://creativecommons.org/licenses/by-nc/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
UEL |
publisher.none.fl_str_mv |
UEL |
dc.source.none.fl_str_mv |
Semina: Ciências Agrárias; Vol. 34 No. 4 (2013); 1479-1492 Semina: Ciências Agrárias; v. 34 n. 4 (2013); 1479-1492 1679-0359 1676-546X reponame:Semina. Ciências Agrárias (Online) instname:Universidade Estadual de Londrina (UEL) instacron:UEL |
instname_str |
Universidade Estadual de Londrina (UEL) |
instacron_str |
UEL |
institution |
UEL |
reponame_str |
Semina. Ciências Agrárias (Online) |
collection |
Semina. Ciências Agrárias (Online) |
repository.name.fl_str_mv |
Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL) |
repository.mail.fl_str_mv |
semina.agrarias@uel.br |
_version_ |
1799306066043863040 |