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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
18/02/2016 |
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Data da última atualização: |
03/11/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MORAES, M. T. de; DEBIASI, H.; CARLESSO, R.; FRANCHINI, J. C.; SILVA, V. R. da; LUZ, F. B. da. |
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Afiliação: |
MOACIR TUZZIN DE MORAES, UFRGS; HENRIQUE DEBIASI, CNPSO; REIMAR CARLESSO, UFSM; JULIO CEZAR FRANCHINI DOS SANTOS, CNPSO; VANDERLEI RODRIGUES DA SILVA, UFSM; FELIPE BONINI DA LUZ, UFSM. |
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Título: |
Soil physical quality on tillage and cropping systems after two decades in the subtropical region of Brazil. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Soil & Tillage Research, n. 155, p. 351-362, Jan. 2016. |
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ISSN: |
0167-1987 |
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DOI: |
10.1016/j.still.2015.07.015 |
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Idioma: |
Inglês |
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Conteúdo: |
Sustainability of crop production systems depends on the preservation of soil physical quality over time. This study aimed to determine long-term effects of soil tillage and cropping systems on physical attributes and hydraulic properties of an Oxisol in Southern Brazil, emphasising management practices to preserve or improve the soil structure quality under no-tillage system. The experiment was conducted in randomized block design, using a 5 × 2 factorial arrangement (tillage × cropping systems), with four replications. The five tillage systems consisted of conventional tillage (CT); minimum tillage, chiselled soil every year (MTC1); minimum tillage, chiselled soil every three years (MTC3); continuous no-tillage for 11 years (NT11); and continuous no-tillage for 24 years (NT24). The two cropping systems consisted of annual crop sequence with wheat in the winter and soybean in the summer, designated as crop succession (CS); and a 4-year crop rotation (CR) with white lupine-maize?black oat-soybean?wheat-soybean? wheat-soybean in winter?summer, respectively. Undisturbed soil cores were collected from 0?0.10; 0.10?0.20 and 0.20?0.30 m of soil depth, to determine the soil bulk density (BD), total porosity, macroporosity, microporosity, pore size distribution and classes, soil water retention curve, infiltration rate and field-saturated hydraulic conductivity. There was no interaction between tillage and cropping systems, and no effects of cropping systems on soil physical and hydraulic properties. Regardless the cropping system, chiselling effects on soil physical properties persisted for less than 22 months, and were restricted to below 0.20 m soil depth. The CT resulted in soil pulverization at 0?0.10 m depth, leading to lower BD and higher macroporosity compared to the other soil tillage systems. At layers below 0.10 m, CT increased the BD and reduced the macroporosity to critical levels for crop growth. Continuous use of no-tillage improved soil physical quality mainly at deeper layers, and provided higher plant available water retention in the soil at matric potentials ranging from ?10 to ?200 kPa in relation to CT and MTC1. The adoption of NT improves soil physical quality and plant available water over time, and periodic soil chiselling aiming to disrupt compacted layers should be avoided because of its effects on reducing soil compaction level are short-lived. MenosSustainability of crop production systems depends on the preservation of soil physical quality over time. This study aimed to determine long-term effects of soil tillage and cropping systems on physical attributes and hydraulic properties of an Oxisol in Southern Brazil, emphasising management practices to preserve or improve the soil structure quality under no-tillage system. The experiment was conducted in randomized block design, using a 5 × 2 factorial arrangement (tillage × cropping systems), with four replications. The five tillage systems consisted of conventional tillage (CT); minimum tillage, chiselled soil every year (MTC1); minimum tillage, chiselled soil every three years (MTC3); continuous no-tillage for 11 years (NT11); and continuous no-tillage for 24 years (NT24). The two cropping systems consisted of annual crop sequence with wheat in the winter and soybean in the summer, designated as crop succession (CS); and a 4-year crop rotation (CR) with white lupine-maize?black oat-soybean?wheat-soybean? wheat-soybean in winter?summer, respectively. Undisturbed soil cores were collected from 0?0.10; 0.10?0.20 and 0.20?0.30 m of soil depth, to determine the soil bulk density (BD), total porosity, macroporosity, microporosity, pore size distribution and classes, soil water retention curve, infiltration rate and field-saturated hydraulic conductivity. There was no interaction between tillage and cropping systems, and no effects of cropping systems on soil physical and hy... Mostrar Tudo |
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Thesagro: |
Física do solo; Plantio direto; Porosidade; Rotação de cultura; Solo. |
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Thesaurus Nal: |
Chiseling; Crop rotation; No-tillage; Porosity; Soil physical properties. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 03345naa a2200325 a 4500
001 2037516
005 2017-11-03
008 2016 bl uuuu u00u1 u #d
022 $a0167-1987
024 7 $a10.1016/j.still.2015.07.015$2DOI
100 1 $aMORAES, M. T. de
245 $aSoil physical quality on tillage and cropping systems after two decades in the subtropical region of Brazil.$h[electronic resource]
260 $c2016
520 $aSustainability of crop production systems depends on the preservation of soil physical quality over time. This study aimed to determine long-term effects of soil tillage and cropping systems on physical attributes and hydraulic properties of an Oxisol in Southern Brazil, emphasising management practices to preserve or improve the soil structure quality under no-tillage system. The experiment was conducted in randomized block design, using a 5 × 2 factorial arrangement (tillage × cropping systems), with four replications. The five tillage systems consisted of conventional tillage (CT); minimum tillage, chiselled soil every year (MTC1); minimum tillage, chiselled soil every three years (MTC3); continuous no-tillage for 11 years (NT11); and continuous no-tillage for 24 years (NT24). The two cropping systems consisted of annual crop sequence with wheat in the winter and soybean in the summer, designated as crop succession (CS); and a 4-year crop rotation (CR) with white lupine-maize?black oat-soybean?wheat-soybean? wheat-soybean in winter?summer, respectively. Undisturbed soil cores were collected from 0?0.10; 0.10?0.20 and 0.20?0.30 m of soil depth, to determine the soil bulk density (BD), total porosity, macroporosity, microporosity, pore size distribution and classes, soil water retention curve, infiltration rate and field-saturated hydraulic conductivity. There was no interaction between tillage and cropping systems, and no effects of cropping systems on soil physical and hydraulic properties. Regardless the cropping system, chiselling effects on soil physical properties persisted for less than 22 months, and were restricted to below 0.20 m soil depth. The CT resulted in soil pulverization at 0?0.10 m depth, leading to lower BD and higher macroporosity compared to the other soil tillage systems. At layers below 0.10 m, CT increased the BD and reduced the macroporosity to critical levels for crop growth. Continuous use of no-tillage improved soil physical quality mainly at deeper layers, and provided higher plant available water retention in the soil at matric potentials ranging from ?10 to ?200 kPa in relation to CT and MTC1. The adoption of NT improves soil physical quality and plant available water over time, and periodic soil chiselling aiming to disrupt compacted layers should be avoided because of its effects on reducing soil compaction level are short-lived.
650 $aChiseling
650 $aCrop rotation
650 $aNo-tillage
650 $aPorosity
650 $aSoil physical properties
650 $aFísica do solo
650 $aPlantio direto
650 $aPorosidade
650 $aRotação de cultura
650 $aSolo
700 1 $aDEBIASI, H.
700 1 $aCARLESSO, R.
700 1 $aFRANCHINI, J. C.
700 1 $aSILVA, V. R. da
700 1 $aLUZ, F. B. da
773 $tSoil & Tillage Research$gn. 155, p. 351-362, Jan. 2016.
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Registro original: |
Embrapa Soja (CNPSO) |
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Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
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URL |
Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
04/07/2023 |
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Data da última atualização: |
04/07/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 3 |
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Autoria: |
GUEDES, W. N.; BABOS, D. V.; COSTA, V. C.; MORAIS, C. P de; FREITAS, V. S.; STENIO, K.; XAVIER, A. A. P.; BORDUCHI, L. C. L.; VILLAS-BOAS, P. R.; MILORI, D. M. B. P. |
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Afiliação: |
PAULINO RIBEIRO VILLAS BOAS, CNPDIA; DEBORA MARCONDES BASTOS PEREIRA, CNPDIA. |
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Título: |
Evaluation of univariate and multivariate calibration strategies for the direct determination of total carbon in soils by laser-induced breakdown spectroscopy: tutorial. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Journal of the Optical Society of America B, v. 40, n. 5, 2023. |
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Páginas: |
1319 - 1330 |
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ISSN: |
0740-3224 |
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DOI: |
https://doi.org/10.1364/JOSAB.482644 |
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Idioma: |
Inglês |
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Conteúdo: |
The correct choice of the calibration strategy method is a step that can ensure the accuracy of carbon determination in soils by laser-induced breakdown spectroscopy. In this paper, we evaluate and discuss the intrinsic characteristics of univariate and multivariate calibration strategies in overcoming soil matrix effects and their influence on the magnitude of calibration and prediction error values. The matrix-matching calibration with previous correction of Al spectral interference in the C I line at 193.03 nm was the best strategy of the 13 univariate models evaluated [root-mean-square error of calibration?(RMSEP) = 0.2 wt.% C]. In the multivariate evaluation of the 22 models obtained, the artificial neural network allowed obtaining a lower value of prediction error for C (RMSEP = 0.1 wt.% C) with very good accuracy (98%) for the set samples of validation. The observation of these results was justified considering the advantages and limitations of each calibration strategy explored. |
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Palavras-Chave: |
Accuracy of carbon; Laser-induced breakdown spectroscopy. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1154795/1/P-Evaluation-of-univariate-and-multivariate.pdf
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Marc: |
LEADER 01967naa a2200289 a 4500
001 2154795
005 2023-07-04
008 2023 bl uuuu u00u1 u #d
022 $a0740-3224
024 7 $ahttps://doi.org/10.1364/JOSAB.482644$2DOI
100 1 $aGUEDES, W. N.
245 $aEvaluation of univariate and multivariate calibration strategies for the direct determination of total carbon in soils by laser-induced breakdown spectroscopy$btutorial.$h[electronic resource]
260 $c2023
300 $a1319 - 1330
520 $aThe correct choice of the calibration strategy method is a step that can ensure the accuracy of carbon determination in soils by laser-induced breakdown spectroscopy. In this paper, we evaluate and discuss the intrinsic characteristics of univariate and multivariate calibration strategies in overcoming soil matrix effects and their influence on the magnitude of calibration and prediction error values. The matrix-matching calibration with previous correction of Al spectral interference in the C I line at 193.03 nm was the best strategy of the 13 univariate models evaluated [root-mean-square error of calibration?(RMSEP) = 0.2 wt.% C]. In the multivariate evaluation of the 22 models obtained, the artificial neural network allowed obtaining a lower value of prediction error for C (RMSEP = 0.1 wt.% C) with very good accuracy (98%) for the set samples of validation. The observation of these results was justified considering the advantages and limitations of each calibration strategy explored.
653 $aAccuracy of carbon
653 $aLaser-induced breakdown spectroscopy
700 1 $aBABOS, D. V.
700 1 $aCOSTA, V. C.
700 1 $aMORAIS, C. P de
700 1 $aFREITAS, V. S.
700 1 $aSTENIO, K.
700 1 $aXAVIER, A. A. P.
700 1 $aBORDUCHI, L. C. L.
700 1 $aVILLAS-BOAS, P. R.
700 1 $aMILORI, D. M. B. P.
773 $tJournal of the Optical Society of America B$gv. 40, n. 5, 2023.
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