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| Registros recuperados : 100 | |
| 9. |  | PEIXOTO, C. N.; OTTONI, G.; FILIPPI, M. C. C.; SILVA-LOBO, V. L.; PRABHU, A. S. Biology of Gaeumannomyces graminis var. graminis isolates from rice and grasses and epidemiological aspects of crown sheath rot of rice. Tropical Plant Pathology, Brasília, DF, v. 38, n. 6, p. 495-504, nov./dez. 2013.| Biblioteca(s): Embrapa Arroz e Feijão. |
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| 11. | | GONÇALVES, F. J.; MAGALHÃES, M. S.; SILVA-LOBO, V. L.; PRABHU, A. S.; FILIPPI, M. C. Comparação entre marcadores moleculares no estudo da variabilidade de Magnaporthe oryzae. In: SEMINÁRIO JOVENS TALENTOS, 5., 2011, Santo Antônio de Goiás. Resumos apresentados. Santo Antônio de Goiás: Embrapa Arroz e Feijão, 2011. p. 29. (Embrapa Arroz e Feijão. Documentos, 270).| Biblioteca(s): Embrapa Arroz e Feijão. |
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| 12. | | MACHADO, M. R.; OLIVEIRA, T. B.; SILVA-LOBO, V. L.; FILIPPI, M. C. Controle da brusone nas folhas em arroz de terras altas. Fitopatologia Brasileira, Brasília, DF, v. 32, p. S 229, ago. 2007. Suplemento. ref. 0599. Edição dos Resumos do XL Congresso Brasileiro de Fitopatologia, Maringá, PR, ago. 2007.| Biblioteca(s): Embrapa Arroz e Feijão. |
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| 13. | | MACHADO, M. R.; SILVA, F. R.; FILIPPI, M. C.; SILVA-LOBO, V. L. Efeito de rizobactérias na redução da severidade da brusone em arroz. Tropical Plant Pathology, v. 35, p. S57, ago. 2010. Suplemento, ref. 02.041. Edição dos resumos do XLIII Congresso Brasileiro de Fitopatologia, Cuiabá, ago. 2010.| Biblioteca(s): Embrapa Arroz e Feijão. |
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| 14. | | GIORDANO, L. de B.; SILVA-LOBO, V. L. da; SANTANA, F. M.; BOITEUX, L. S. Herança da resistência a geminivirus em tomateiro. Horticultura Brasileira, Brasília, DF, v. 19, n. 2, jul. 2001. não paginado. CD-ROM. Trabalho apresentado no 41° Congresso Brasileiro de Olericultura, 2001.| Biblioteca(s): Embrapa Hortaliças. |
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| 17. | | OLIVEIRA, T. B.; MACHADO, M. R.; SILVA-LOBO, V. L.; FILIPPI, M. C. Aumento da produtividade em arroz, cv. BRS Primavera, por meio do controle da brusone nas panículas. Fitopatologia Brasileira, Brasília, DF, v. 32, p. S 202-S 203, ago. 2007. Suplemento. ref. 0464. Edição dos Resumos do XL Congresso Brasileiro de Fitopatologia, Maringá, PR, ago. 2007.| Biblioteca(s): Embrapa Arroz e Feijão. |
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| 18. | | CÔRTES, M. V. C. B.; SILVA-LOBO, V. L.; FILIPPI, M. C. C.; PRABHU, A. S. Avaliação da expressão de PRPs em plantas de arroz submetidas a tratamento químico ou biológico através de PAGE-Nativo. Tropical Plant Pathology, Brasília, DF, v. 34, p. S144, out. 2009. Suplemento, ref. 514. Edição dos Resumos do XLII do Congresso Brasileiro de Fitopatologia, Rio de Janeiro, RJ, out. 2009.| Biblioteca(s): Embrapa Arroz e Feijão. |
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| 19. | | SILVA-LOBO, V. L.; CORTES, M. V.; SILVA, L. P.; FILIPPI, M. C.; PRABHU, A. S. Inhibition of Magnaporthe oryzae and Rhizoctonia solani by Sarocladium oryzae, the causal agent of sheath rot in rice. Phytopathology, St. Paul, v. 101, n. 6, p. S167, 2011. Supplement. Edição dos Resumos da APS-IPPC 2011 Joint Meeting in Honolulu, Hawaii, USA, Aug. 2011.| Biblioteca(s): Embrapa Arroz e Feijão. |
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| 20. | | NOGUEIRA, T. A.; CORTES, M. V. C. B.; SILVA-LOBO, V. L.; FILIPPI, M. C. Inibição in vitro dos principais patógenos do arroz por bactérias do filoplano e rizoplano. Tropical Plant Pathology, Brasília, DF, v. 36, p. 758, ago. 2011. Suplemento, ref. 1126. Edição dos Resumos do 44 Congresso Brasileiro de Fitopatologia, Bento Gonçalves, ago. 2011. 1 CD-ROM.| Biblioteca(s): Embrapa Arroz e Feijão. |
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| Registros recuperados : 100 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
06/11/2012 |
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Data da última atualização: |
27/02/2013 |
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Autoria: |
VASQUES, G. de M.; DEMATTE, J. A. M.; LOPEZ, L. R.; TERRA, F. da S. |
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Afiliação: |
GUSTAVO DE MATTOS VASQUES, CNPS; José Alexandre Melo Dematte, Universidade de São Paulo; Leonardo Ramirez Lopez, Geographisches Institut, Universität Tübingen, Rümelinstraße; Fabrício da Silva Terra, Universidade de São Paulo. |
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Título: |
Soil classification from visible/near-infrared diffuse reflectance spectra at multiple depths. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 33., 2011, Uberlândia. Solos nos biomas brasileiros: sustentabilidade e mudanças climáticas: anais. Uberlândia: SBCS: UFU: ICIAG, 2011. 1 CD-ROM. |
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Páginas: |
4 p. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract : Visible/near-infrared diffuse reflectance spectroscopy (VNIRS) offers an alternative to conventional analytical methods to estimate various soil attributes. However, the use of VNIRS in soil survey and taxonomic classification is still underexplored. We investigated the potential use of VNIRS to classify soils in a region with variable soils, geology, and topography in southeastern Brazil. We combined principal component (PC) analysis, and multinomial logistic regression to classify 291 soils at the levels of suborder (second highest), and suborder with textural classification (STC), described in the field according to the Brazilian Soil Classification System. Soil visible/near-infrared (400-2500 nm) spectra were collected from three depth intervals (0-20, 40-60, and 80-100 cm), and combined in sequence to compose a pseudo multi-depth spectral curve, which was used to derive the classification models. The percent of correctly classified soils at the suborder level was 79% using 20 PCs, and 96% using 30 PCs. At the STC level, soils were correctly classified in 100%, and 78% of the cases using 20, and 30 PCs, respectively. Given the inherent complexity and variability within soil taxonomic groups, and in contrast the similarity among different groups, combining spectral data from different depths in multivariate classification offered a simple and inexpensive solution to adequately distinguish soils. This novel approach could improve soil classification and survey in a cost-efficient manner, supporting sustainable use, and management of tropical soils. MenosAbstract : Visible/near-infrared diffuse reflectance spectroscopy (VNIRS) offers an alternative to conventional analytical methods to estimate various soil attributes. However, the use of VNIRS in soil survey and taxonomic classification is still underexplored. We investigated the potential use of VNIRS to classify soils in a region with variable soils, geology, and topography in southeastern Brazil. We combined principal component (PC) analysis, and multinomial logistic regression to classify 291 soils at the levels of suborder (second highest), and suborder with textural classification (STC), described in the field according to the Brazilian Soil Classification System. Soil visible/near-infrared (400-2500 nm) spectra were collected from three depth intervals (0-20, 40-60, and 80-100 cm), and combined in sequence to compose a pseudo multi-depth spectral curve, which was used to derive the classification models. The percent of correctly classified soils at the suborder level was 79% using 20 PCs, and 96% using 30 PCs. At the STC level, soils were correctly classified in 100%, and 78% of the cases using 20, and 30 PCs, respectively. Given the inherent complexity and variability within soil taxonomic groups, and in contrast the similarity among different groups, combining spectral data from different depths in multivariate classification offered a simple and inexpensive solution to adequately distinguish soils. This novel approach could improve soil classification and survey i... Mostrar Tudo |
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Palavras-Chave: |
Multivariate classification; Pedometrics. |
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Thesaurus NAL: |
spectroscopy. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://www.alice.cnptia.embrapa.br/alice/bitstream/doc/939003/1/soilclassificationfronvisiblenearinfrared....PDF
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Marc: |
LEADER 02329nam a2200193 a 4500
001 1939003
005 2013-02-27
008 2011 bl uuuu u00u1 u #d
100 1 $aVASQUES, G. de M.
245 $aSoil classification from visible/near-infrared diffuse reflectance spectra at multiple depths.$h[electronic resource]
260 $aIn: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 33., 2011, Uberlândia. Solos nos biomas brasileiros: sustentabilidade e mudanças climáticas: anais. Uberlândia: SBCS: UFU: ICIAG, 2011. 1 CD-ROM.$c2011
300 $a4 p.
520 $aAbstract : Visible/near-infrared diffuse reflectance spectroscopy (VNIRS) offers an alternative to conventional analytical methods to estimate various soil attributes. However, the use of VNIRS in soil survey and taxonomic classification is still underexplored. We investigated the potential use of VNIRS to classify soils in a region with variable soils, geology, and topography in southeastern Brazil. We combined principal component (PC) analysis, and multinomial logistic regression to classify 291 soils at the levels of suborder (second highest), and suborder with textural classification (STC), described in the field according to the Brazilian Soil Classification System. Soil visible/near-infrared (400-2500 nm) spectra were collected from three depth intervals (0-20, 40-60, and 80-100 cm), and combined in sequence to compose a pseudo multi-depth spectral curve, which was used to derive the classification models. The percent of correctly classified soils at the suborder level was 79% using 20 PCs, and 96% using 30 PCs. At the STC level, soils were correctly classified in 100%, and 78% of the cases using 20, and 30 PCs, respectively. Given the inherent complexity and variability within soil taxonomic groups, and in contrast the similarity among different groups, combining spectral data from different depths in multivariate classification offered a simple and inexpensive solution to adequately distinguish soils. This novel approach could improve soil classification and survey in a cost-efficient manner, supporting sustainable use, and management of tropical soils.
650 $aspectroscopy
653 $aMultivariate classification
653 $aPedometrics
700 1 $aDEMATTE, J. A. M.
700 1 $aLOPEZ, L. R.
700 1 $aTERRA, F. da S.
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Embrapa Solos (CNPS) |
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