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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
15/08/2006 |
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Data da última atualização: |
05/10/2007 |
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Autoria: |
MADARI, B. E.; REEVES III, J. B.; MACHADO, P. L. O. A.; GUIMARÃES, C. M.; TORRES, E.; MCCARTY, G. W. |
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Título: |
Mid- and near-infrared spectroscopic assessment of soil compositional parameters and structural indices in two Ferralsols. |
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Ano de publicação: |
2006 |
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Fonte/Imprenta: |
Geoderma, Amsterdam, v. 136, n. 1/2, p. 245-259, Dec. 2006. |
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Idioma: |
Inglês |
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Conteúdo: |
Bulk soil samples (BS) (n = 120) from long-term tillage experiments and areas covered by secondary natural forest were collected in the Brazilian savanna region (Cerrado) at Santo Antônio de Goiás, and southern Atlantic forest region at Londrina. Bulk soils were separated into 8 aggregate size fractions (ASF) by wet sieving (n = 700). Bulk soil samples (BS) and ASF were analyzed for total C, N by dry combustion. BS were also analyzed for sand, silt, and clay by densitometry, and several measures of soil aggregation were determined. All samples were scanned in the mid- and near-infrared (Mid-IR, NIR) by diffuse reflectance of ground, non-KBr diluted samples using a Digilab FTS-7000 FTIR spectrometer equipped with a Pike Auto-Diff auto-sampler. Quantitative calibrations for the various analytes were performed separately for the original set of 120 BS samples and the set of 700 ASF samples using partial least squares regression (PLSR). Results for the set of 120 BS for total C and N were excellent using either spectral range with R2 > 0.97, except for C by Mid-IR (R2 = 0.93). Similar results were obtained for determinations of sand and clay (R2 > 0.94). Silt, determined by difference (100% - %sand - %clay), gave much lower R2 (0.80 and 0.63 for Mid-IR and NIR, respectively). For aggregation indices, R2 of 0.80 were achieved in the Mid-IR, NIR results were not as good (R2 < 0.67). Efforts with the 700 ASF samples resulted in R2 of 0.98 and 0.96 for C, and 0.96 and 0.97 for N, for Mid-IR and NIR calibrations, respectively. Calibration efforts to determine the values for the set of 700 ASF samples using set of 120 BS from which they were fractionated gave R2 = 0.90 and 0.87 in the Mid-IR and NIR, respectively, when 5% of the ASF were added to the set of 120 BS. Spectral discrimination of sample source was easily and very accurately determined for all data sets examined. MenosBulk soil samples (BS) (n = 120) from long-term tillage experiments and areas covered by secondary natural forest were collected in the Brazilian savanna region (Cerrado) at Santo Antônio de Goiás, and southern Atlantic forest region at Londrina. Bulk soils were separated into 8 aggregate size fractions (ASF) by wet sieving (n = 700). Bulk soil samples (BS) and ASF were analyzed for total C, N by dry combustion. BS were also analyzed for sand, silt, and clay by densitometry, and several measures of soil aggregation were determined. All samples were scanned in the mid- and near-infrared (Mid-IR, NIR) by diffuse reflectance of ground, non-KBr diluted samples using a Digilab FTS-7000 FTIR spectrometer equipped with a Pike Auto-Diff auto-sampler. Quantitative calibrations for the various analytes were performed separately for the original set of 120 BS samples and the set of 700 ASF samples using partial least squares regression (PLSR). Results for the set of 120 BS for total C and N were excellent using either spectral range with R2 > 0.97, except for C by Mid-IR (R2 = 0.93). Similar results were obtained for determinations of sand and clay (R2 > 0.94). Silt, determined by difference (100% - %sand - %clay), gave much lower R2 (0.80 and 0.63 for Mid-IR and NIR, respectively). For aggregation indices, R2 of 0.80 were achieved in the Mid-IR, NIR results were not as good (R2 < 0.67). Efforts with the 700 ASF samples resulted in R2 of 0.98 and 0.96 for C, and 0.96 and 0.97 for N, f... Mostrar Tudo |
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Categoria do assunto: |
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Marc: |
LEADER 02473naa a2200181 a 4500
001 1469532
005 2007-10-05
008 2006 bl --- 0-- u #d
100 1 $aMADARI, B. E.
245 $aMid- and near-infrared spectroscopic assessment of soil compositional parameters and structural indices in two Ferralsols.
260 $c2006
520 $aBulk soil samples (BS) (n = 120) from long-term tillage experiments and areas covered by secondary natural forest were collected in the Brazilian savanna region (Cerrado) at Santo Antônio de Goiás, and southern Atlantic forest region at Londrina. Bulk soils were separated into 8 aggregate size fractions (ASF) by wet sieving (n = 700). Bulk soil samples (BS) and ASF were analyzed for total C, N by dry combustion. BS were also analyzed for sand, silt, and clay by densitometry, and several measures of soil aggregation were determined. All samples were scanned in the mid- and near-infrared (Mid-IR, NIR) by diffuse reflectance of ground, non-KBr diluted samples using a Digilab FTS-7000 FTIR spectrometer equipped with a Pike Auto-Diff auto-sampler. Quantitative calibrations for the various analytes were performed separately for the original set of 120 BS samples and the set of 700 ASF samples using partial least squares regression (PLSR). Results for the set of 120 BS for total C and N were excellent using either spectral range with R2 > 0.97, except for C by Mid-IR (R2 = 0.93). Similar results were obtained for determinations of sand and clay (R2 > 0.94). Silt, determined by difference (100% - %sand - %clay), gave much lower R2 (0.80 and 0.63 for Mid-IR and NIR, respectively). For aggregation indices, R2 of 0.80 were achieved in the Mid-IR, NIR results were not as good (R2 < 0.67). Efforts with the 700 ASF samples resulted in R2 of 0.98 and 0.96 for C, and 0.96 and 0.97 for N, for Mid-IR and NIR calibrations, respectively. Calibration efforts to determine the values for the set of 700 ASF samples using set of 120 BS from which they were fractionated gave R2 = 0.90 and 0.87 in the Mid-IR and NIR, respectively, when 5% of the ASF were added to the set of 120 BS. Spectral discrimination of sample source was easily and very accurately determined for all data sets examined.
700 1 $aREEVES III, J. B.
700 1 $aMACHADO, P. L. O. A.
700 1 $aGUIMARÃES, C. M.
700 1 $aTORRES, E.
700 1 $aMCCARTY, G. W.
773 $tGeoderma, Amsterdam$gv. 136, n. 1/2, p. 245-259, Dec. 2006.
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Registro original: |
Embrapa Soja (CNPSO) |
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Registro Completo
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Biblioteca(s): |
Embrapa Cerrados; Embrapa Pantanal. |
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Data corrente: |
08/01/2008 |
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Data da última atualização: |
18/02/2008 |
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Tipo da produção científica: |
Comunicado Técnico/Recomendações Técnicas |
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Circulação/Nível: |
-- - -- |
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Autoria: |
PELLEGRIN, A. O.; LEITE, R. de M. H.; SERENO, J. R. B.; LAGE, A. P.; LEITE, R. C.; RAVAGLIA, E. |
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Afiliação: |
Aiesca Oliveira Pelegrin, Embrapa Pantanal; Rômulo Cerqueira Leite, UFMG; José Robson Bezerra Sereno, Embrapa Cerrados; Andrey Pereira Lage, UFMG; Ernande Ravaglia, Embrapa Pantanal. |
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Título: |
Brucelose bovina no Pantanal Sul-Matogrossense: dados preliminares. |
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Ano de publicação: |
2006 |
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Fonte/Imprenta: |
Corumbá: Embrapa Pantanal, 2006 |
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Páginas: |
4 p. |
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Série: |
(Embrapa Pantanal. Comunicado Técnico, 58). |
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Idioma: |
Português |
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Notas: |
Formato Eletrônico |
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Conteúdo: |
Com o objetivo de levantar a freqüência preliminar de bovinos de corte não vacinados do Pantanal, foram visitados, no período de 1994 a 1996, 16 rebanhos e 309 animais, sorteados dentre as fazendas cadastradas na Embrapa Pantanal. A freqüência foi estimada com base no número de animais que apresentavam resultados positivos em ambos os testes (AAT e soroaglutinação lenta/2 mercaptoetanol (2ME)) Os resultados do testes diagnósticos confirmatórios foram positivos, negativos ou inconclusivos e classificou-se como positiva a propriedade que apresentou pelo menos um animal positivo no teste confirmatório (2ME); negativa, quando todas os animais apresentaram-se negativos nos testes sorológicos e inconclusiva, quando existiram resultados sorológicos negativos e inconclusivo em pelo menos um dos animais. |
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Palavras-Chave: |
bovinos de corte. |
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Thesagro: |
Brucelose; Diagnostico; Doença Animal; Gado de Corte. |
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Categoria do assunto: |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CPAP/55946/1/COT58.pdf
https://ainfo.cnptia.embrapa.br/digital/bitstream/CPAC/28669/1/COT58.pdf
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Marc: |
LEADER 01546nam a2200265 a 4500
001 1812543
005 2008-02-18
008 2006 bl uuuu u0uu1 u #d
100 1 $aPELLEGRIN, A. O.
245 $aBrucelose bovina no Pantanal Sul-Matogrossense$bdados preliminares.
260 $aCorumbá: Embrapa Pantanal$c2006
300 $a4 p.
490 $a(Embrapa Pantanal. Comunicado Técnico, 58).
500 $aFormato Eletrônico
520 $aCom o objetivo de levantar a freqüência preliminar de bovinos de corte não vacinados do Pantanal, foram visitados, no período de 1994 a 1996, 16 rebanhos e 309 animais, sorteados dentre as fazendas cadastradas na Embrapa Pantanal. A freqüência foi estimada com base no número de animais que apresentavam resultados positivos em ambos os testes (AAT e soroaglutinação lenta/2 mercaptoetanol (2ME)) Os resultados do testes diagnósticos confirmatórios foram positivos, negativos ou inconclusivos e classificou-se como positiva a propriedade que apresentou pelo menos um animal positivo no teste confirmatório (2ME); negativa, quando todas os animais apresentaram-se negativos nos testes sorológicos e inconclusiva, quando existiram resultados sorológicos negativos e inconclusivo em pelo menos um dos animais.
650 $aBrucelose
650 $aDiagnostico
650 $aDoença Animal
650 $aGado de Corte
653 $abovinos de corte
700 1 $aLEITE, R. de M. H.
700 1 $aSERENO, J. R. B.
700 1 $aLAGE, A. P.
700 1 $aLEITE, R. C.
700 1 $aRAVAGLIA, E.
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Embrapa Pantanal (CPAP) |
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