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| 103. |  | BALBINO, L. C.; BRUAND, A.; BROSSARD, M.; GRIMALDI, M.; HAJNOS, M.; GUIMARAES, M. F. Changes in porosity and microaggregation in clayey Ferralsols of the Brazilian Cerrado on clearing for pasture. European Journal of Soil Science, v. 53, n. 2, p. 219-230, June 2002.| Biblioteca(s): Embrapa Arroz e Feijão. |
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| 105. | | CHIBEBA, A. M.; GUIMARAES, M. de F.; NOGUEIRA, M. A.; BOAHEN, S. K.; HUNGRIA, M. Characterization of indigenous rhizobia isolated from soybean [Glycine max (L.) Merrill] grown in mozambique. In: REUNIÃO LATINOAMERICANA DE RIZOBIOLOGIA - RELAR, 27., 2016, Londrina. Fortalecendo as parcerias Sul-Sul: anais. Curitiba: SBCS-NEPAR, 2016. p. 206. Editores: Mariangela Hungria, Douglas Fabiano Gomes, Arnaldo Colozzi Filho.| Biblioteca(s): Embrapa Soja. |
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| 106. | | SIMOES, W. L.; COELHO FILHO, M. A.; DRUMOND, M. A.; GUIMARÃES, M. J. M. Características agronômicas e produtividade de amemdoim em diferentes formas de cultivo no Recôncavo Baiano. In: CONGRESSO DA REDE BRASILEIRA DE TECNOLOGIA DE BIODIESEL, 3., 2009, Brasília, DF. Anais... Brasília, DF: MCT, 2009. p. 437-438.| Biblioteca(s): Embrapa Semiárido. |
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| 107. | | SANTOS, R. C. dos; MORAES, J. de S.; GUIMARÃES, M. B. Caracteres de floração e reprodução em genótipos de amendoim do tipo ereto, ramador e decumbente. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 32, n. 12, p. 1257-1262, dez. 1997. Título em inglês: Flowering and reproduction characters in erect, spreading and decumbent peanut genotypes.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 111. | | NEVES, C. S. V. J.; DECHEN, A. R.; MEDINA, C. de C.; GUIMARÃES, M. de F. Comparison of citrus rooting evaluationn methods using root images in soil profiles and root weight. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 35, n. 12, p. 2537-41, dez. 2000 Notas Científicas.
Título em português: Características de frutos de genótipos de aceroleira cultivados sob elevada altitude.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 113. | | QUEIROZ, P. R.; GUIMARÃES, M. N. K.; OLIVEIRA, M. R. V.; LIMA, L. H. C. Caracterização molecular e desenvolvimento de marcadores específicos para a detecção de biótipos de Bemisia tabaci. In: ENCONTRO DO TALENTO ESTUDANTIL DA EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA, 11., 2006, Brasília, DF. Anais: resumos dos trabalhos. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2006. p. 221.| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 119. | | MARRIEL, I.; GUIMARAES, M.; LANA, U.; PARRELLA, R.; RAMOS, T.; REIS, D.; GUIMARAES, E.; TEIXEIRA, F. Functional diversity of yeast associated with sweet sorghum plants determined through the system Biolog. In: CONGRESO LATINOAMERICANO DE MICROBIOLOGIA, 23.; CONGRESO ARGENTINO DE MICROBIOLOGIA, 14., 2016, Rosário. Resúmenes. Buenos Aires: Asociación Argentina de Microbiología, 2016.| Biblioteca(s): Embrapa Milho e Sorgo. |
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| Registros recuperados : 675 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com cpac.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
14/06/2022 |
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Data da última atualização: |
14/06/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
OLIVEIRA, J. F. de; BROSSARD, M.; CORAZZA, E. J.; GUIMARÃES, M. F.; MARCHAO, R. L. |
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Afiliação: |
JOSE FRANCIRLEI DE OLIVEIRA; MICHEL BROSSARD; EDEMAR JOAQUIM CORAZZA, SPD; MARIA DE FATIMA GUIMARAES; ROBELIO LEANDRO MARCHAO, CPAC. |
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Título: |
Field-scale spatial correlation between soil and Vis-NIR spectra in the Cerrado biome of Central Brazi. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Geoderma Regional, v. 30, e00532, 2022. |
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Páginas: |
13 p. |
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Idioma: |
Inglês |
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Conteúdo: |
Visible and near-infrared (Vis-NIR) spectroscopy is a tool to determine soil spatial variability and has been used to map soils and their properties. Considering that physical, chemical, mineralogical, and morphological soil properties can affect the intensity and the depth of the spectral reflectance band in the Vis-NIR region, the objectives of this work were to: (i) evaluate the potential of the reflectance inflection difference (RID) to discriminate soils; and (ii) verify potential spatial correlations of the RID with soil properties, compared with the full spectra, in order to build thematic maps at a field scale. In a farm of 375 ha, 78 soil samples from the 0.87?0.92-m depth were collected in a regular grid of 200 m, with a focus on the soil diagnostic horizon (Bw horizon). The sampled soils were a Latossolo Vermelho-Amarelo ´ acrico (Haplic Ferralsol) and a Latossolo Vermelho distrofico ´ (Rhodic Ferralsol). Twenty-two physical, chemical, mineralogical, and morphological soil properties were determined, and the Vis-NIR spectra between 400 and 2500 nm were measured. Considering the presence of an inflection band and its relationship with soil properties, the spectral bands used to calculate the RID were between (base 1/base 2): 400?510, 730?930, 1290?1450, 1800?1950, 2000?2218, and 2218?2290 nm. The RID failed to map the spatial variability of soil properties, with a Kappa index of 39%; therefore, it is not a good parameter for building thematic maps of soil parameters. In addition, the complete spectrum (mainly in 400?510, 730?930, 1290?1450, 1800?1950, 2000?2218, and 2218?2290 nm) was better spatially correlated with soil properties than the decomposition of the spectrum by the RID. Soil classification and level of discretization as affected by spectral variability were also discussed here. Three soil groups were discriminated mainly by the Ki and Kr indexes and clay content. Moreover, the variability of the spectra was conditioned by the spatial variability of the mentioned variables. The clay content for soils with a discrepant particle size (group 1 compared with groups 2 and 3) and the Ki and Kr indexes for soils with a homogeneous particle size (between groups 2 and 3), associated with the full Vis-NIR spectral analysis, allowed building thematic maps with a good precision, without the need of mathematical models; this was possible by the modification of the reflectance intensity and the size of the concavity of the spectral band. MenosVisible and near-infrared (Vis-NIR) spectroscopy is a tool to determine soil spatial variability and has been used to map soils and their properties. Considering that physical, chemical, mineralogical, and morphological soil properties can affect the intensity and the depth of the spectral reflectance band in the Vis-NIR region, the objectives of this work were to: (i) evaluate the potential of the reflectance inflection difference (RID) to discriminate soils; and (ii) verify potential spatial correlations of the RID with soil properties, compared with the full spectra, in order to build thematic maps at a field scale. In a farm of 375 ha, 78 soil samples from the 0.87?0.92-m depth were collected in a regular grid of 200 m, with a focus on the soil diagnostic horizon (Bw horizon). The sampled soils were a Latossolo Vermelho-Amarelo ´ acrico (Haplic Ferralsol) and a Latossolo Vermelho distrofico ´ (Rhodic Ferralsol). Twenty-two physical, chemical, mineralogical, and morphological soil properties were determined, and the Vis-NIR spectra between 400 and 2500 nm were measured. Considering the presence of an inflection band and its relationship with soil properties, the spectral bands used to calculate the RID were between (base 1/base 2): 400?510, 730?930, 1290?1450, 1800?1950, 2000?2218, and 2218?2290 nm. The RID failed to map the spatial variability of soil properties, with a Kappa index of 39%; therefore, it is not a good parameter for building thematic maps of soil parameter... Mostrar Tudo |
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Palavras-Chave: |
Diferença de inflexão de refletância; Índices Ki e Kr; Variabilidade espacial do solo. |
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Thesagro: |
Argila; Espectrometria; Raio Infravermelho; Solo. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03277naa a2200265 a 4500
001 2144045
005 2022-06-14
008 2022 bl uuuu u00u1 u #d
100 1 $aOLIVEIRA, J. F. de
245 $aField-scale spatial correlation between soil and Vis-NIR spectra in the Cerrado biome of Central Brazi.$h[electronic resource]
260 $c2022
300 $a13 p.
520 $aVisible and near-infrared (Vis-NIR) spectroscopy is a tool to determine soil spatial variability and has been used to map soils and their properties. Considering that physical, chemical, mineralogical, and morphological soil properties can affect the intensity and the depth of the spectral reflectance band in the Vis-NIR region, the objectives of this work were to: (i) evaluate the potential of the reflectance inflection difference (RID) to discriminate soils; and (ii) verify potential spatial correlations of the RID with soil properties, compared with the full spectra, in order to build thematic maps at a field scale. In a farm of 375 ha, 78 soil samples from the 0.87?0.92-m depth were collected in a regular grid of 200 m, with a focus on the soil diagnostic horizon (Bw horizon). The sampled soils were a Latossolo Vermelho-Amarelo ´ acrico (Haplic Ferralsol) and a Latossolo Vermelho distrofico ´ (Rhodic Ferralsol). Twenty-two physical, chemical, mineralogical, and morphological soil properties were determined, and the Vis-NIR spectra between 400 and 2500 nm were measured. Considering the presence of an inflection band and its relationship with soil properties, the spectral bands used to calculate the RID were between (base 1/base 2): 400?510, 730?930, 1290?1450, 1800?1950, 2000?2218, and 2218?2290 nm. The RID failed to map the spatial variability of soil properties, with a Kappa index of 39%; therefore, it is not a good parameter for building thematic maps of soil parameters. In addition, the complete spectrum (mainly in 400?510, 730?930, 1290?1450, 1800?1950, 2000?2218, and 2218?2290 nm) was better spatially correlated with soil properties than the decomposition of the spectrum by the RID. Soil classification and level of discretization as affected by spectral variability were also discussed here. Three soil groups were discriminated mainly by the Ki and Kr indexes and clay content. Moreover, the variability of the spectra was conditioned by the spatial variability of the mentioned variables. The clay content for soils with a discrepant particle size (group 1 compared with groups 2 and 3) and the Ki and Kr indexes for soils with a homogeneous particle size (between groups 2 and 3), associated with the full Vis-NIR spectral analysis, allowed building thematic maps with a good precision, without the need of mathematical models; this was possible by the modification of the reflectance intensity and the size of the concavity of the spectral band.
650 $aArgila
650 $aEspectrometria
650 $aRaio Infravermelho
650 $aSolo
653 $aDiferença de inflexão de refletância
653 $aÍndices Ki e Kr
653 $aVariabilidade espacial do solo
700 1 $aBROSSARD, M.
700 1 $aCORAZZA, E. J.
700 1 $aGUIMARÃES, M. F.
700 1 $aMARCHAO, R. L.
773 $tGeoderma Regional$gv. 30, e00532, 2022.
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