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Registro Completo |
Biblioteca(s): |
Embrapa Soja. |
Data corrente: |
22/09/1995 |
Data da última atualização: |
21/02/2007 |
Autoria: |
ANTONIO, H.; DALL'AGNOL, A. |
Título: |
Adequacao de niveis de inoculo de Meloidogyne incognita e de tamanho de vasos para avaliacao de genotipos de soja. |
Ano de publicação: |
1981 |
Fonte/Imprenta: |
In: EMBRAPA. Centro Nacional de Pesquisa de Soja (Londrina, PR). Resultados de pesquisa de soja 1980/81. Londrina, 1981. |
Páginas: |
p.407-412. |
Idioma: |
Português |
Palavras-Chave: |
Brasil; Nematode; Parana; Soybean. |
Thesagro: |
Meloidogyne Incognita; Nematóide; Soja. |
Thesaurus Nal: |
Brazil. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00701naa a2200229 a 4500 001 1451297 005 2007-02-21 008 1981 bl uuuu u00u1 u #d 100 1 $aANTONIO, H. 245 $aAdequacao de niveis de inoculo de Meloidogyne incognita e de tamanho de vasos para avaliacao de genotipos de soja. 260 $c1981 300 $ap.407-412. 650 $aBrazil 650 $aMeloidogyne Incognita 650 $aNematóide 650 $aSoja 653 $aBrasil 653 $aNematode 653 $aParana 653 $aSoybean 700 1 $aDALL'AGNOL, A. 773 $tIn: EMBRAPA. Centro Nacional de Pesquisa de Soja (Londrina, PR). Resultados de pesquisa de soja 1980/81. Londrina, 1981.
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Embrapa Soja (CNPSO) |
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Registro Completo
Biblioteca(s): |
Embrapa Cerrados. |
Data corrente: |
23/12/2016 |
Data da última atualização: |
09/01/2017 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
B - 1 |
Autoria: |
OLIVEIRA, J. F. de; BROSSARD, M.; CORAZZA, E. J.; MARCHAO, R. L.; GUIMARÃES, M. de F. |
Afiliação: |
José Francirlei de Oliveira, Universidade Estadual de Londrina; Michel Brossard, IRD (Institut de recherche pour le développement); EDEMAR JOAQUIM CORAZZA, SCT; ROBELIO LEANDRO MARCHAO, CPAC; Maria de Fátima Guimarães, Universidade Estadual de Londrina. |
Título: |
Visible and near infrared spectra of Ferralsols according to their structural features. |
Ano de publicação: |
2016 |
Fonte/Imprenta: |
Journal of Near Infrared Spectroscopy, v. 24, n. 3, p. 243-254, March 2016. |
DOI: |
https://doi.org/10.1255/jnirs.1202 |
Idioma: |
Inglês |
Conteúdo: |
ABSTRACT: In soil science, structural features of soils are an important attribute; soils can be characterised by proportional size distribution of aggregates and the pore space between and within those aggregates. The objective of this study was to evaluate the relationship between the visible and near infrared (Vis?NIR) spectra and microaggregates from a collection of Ferralsols. Our dataset consists of 56 spectra from seven soil profiles of kaolinitic and oxidic-gibbsitic Ferralsols. Soils were characterised according to their morphological features: those with a typical porous massive structure and those with a cohesive massive structure. Size distribution of five classes of microaggregate was determined (1000?2000 µm, 500?1000 µm, 250?500 µm, 105?250 µm and < 105?µm). From the soil spectra, we determined the CIE (Commission Internationale de l'Éclairage) red index (RICIE) and the absorption intensities of kaolinite (IKa) and gibbsite (IGb). The predominant fraction of microaggregates exhibited sizes between 250 and 1000µm (Φ250?1000). The proportional increase of this microaggregate class in the soils increased the scattering and variability of reflected light, particularly when soil samples showed more than 0.50 g g?1 of Φ250?1000. The microaggregate size explained over 55% of reflectance intensity variability of wavelengths in the vis?NIR regions, principally on reflectance intensity and concavity of the spectra at 436 nm, 546 nm and 2236 nm, which decreases with increased proportion of Φ250?1000. Thus, different structural features of Ferralsols can be directly evaluated through Vis?NIR spectroscopy, even in samples sieved through 2.00 mm. These results highlight the potential use of Vis?NIR spectroscopy in studies of soil classification, soil physical behaviour and soil physical fertility and environmental studies, principally by a new method of analysing bulk density and structure of soil directly from the soil spectra, without the need for predictive models. As well as spectra, RICIE,IKa and IGb can be used to characterise the different structural features of Ferralsols. MenosABSTRACT: In soil science, structural features of soils are an important attribute; soils can be characterised by proportional size distribution of aggregates and the pore space between and within those aggregates. The objective of this study was to evaluate the relationship between the visible and near infrared (Vis?NIR) spectra and microaggregates from a collection of Ferralsols. Our dataset consists of 56 spectra from seven soil profiles of kaolinitic and oxidic-gibbsitic Ferralsols. Soils were characterised according to their morphological features: those with a typical porous massive structure and those with a cohesive massive structure. Size distribution of five classes of microaggregate was determined (1000?2000 µm, 500?1000 µm, 250?500 µm, 105?250 µm and < 105?µm). From the soil spectra, we determined the CIE (Commission Internationale de l'Éclairage) red index (RICIE) and the absorption intensities of kaolinite (IKa) and gibbsite (IGb). The predominant fraction of microaggregates exhibited sizes between 250 and 1000µm (Φ250?1000). The proportional increase of this microaggregate class in the soils increased the scattering and variability of reflected light, particularly when soil samples showed more than 0.50 g g?1 of Φ250?1000. The microaggregate size explained over 55% of reflectance intensity variability of wavelengths in the vis?NIR regions, principally on reflectance intensity and concavity of the spectra at 436 nm, 546 nm and 2236 nm, which decreases... Mostrar Tudo |
Palavras-Chave: |
Diffuse reflectance spectroscopy; Espectroscopia de refletância difusa; Latosol; Microped; Soil mineral; Solo mineral. |
Thesagro: |
Estrutura do Solo; Latossolo. |
Thesaurus NAL: |
Soil structure. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/152250/1/Oliveira-et-al-2016.pdf
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Marc: |
LEADER 03018naa a2200289 a 4500 001 2059216 005 2017-01-09 008 2016 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1255/jnirs.1202$2DOI 100 1 $aOLIVEIRA, J. F. de 245 $aVisible and near infrared spectra of Ferralsols according to their structural features. 260 $c2016 520 $aABSTRACT: In soil science, structural features of soils are an important attribute; soils can be characterised by proportional size distribution of aggregates and the pore space between and within those aggregates. The objective of this study was to evaluate the relationship between the visible and near infrared (Vis?NIR) spectra and microaggregates from a collection of Ferralsols. Our dataset consists of 56 spectra from seven soil profiles of kaolinitic and oxidic-gibbsitic Ferralsols. Soils were characterised according to their morphological features: those with a typical porous massive structure and those with a cohesive massive structure. Size distribution of five classes of microaggregate was determined (1000?2000 µm, 500?1000 µm, 250?500 µm, 105?250 µm and < 105?µm). From the soil spectra, we determined the CIE (Commission Internationale de l'Éclairage) red index (RICIE) and the absorption intensities of kaolinite (IKa) and gibbsite (IGb). The predominant fraction of microaggregates exhibited sizes between 250 and 1000µm (Φ250?1000). The proportional increase of this microaggregate class in the soils increased the scattering and variability of reflected light, particularly when soil samples showed more than 0.50 g g?1 of Φ250?1000. The microaggregate size explained over 55% of reflectance intensity variability of wavelengths in the vis?NIR regions, principally on reflectance intensity and concavity of the spectra at 436 nm, 546 nm and 2236 nm, which decreases with increased proportion of Φ250?1000. Thus, different structural features of Ferralsols can be directly evaluated through Vis?NIR spectroscopy, even in samples sieved through 2.00 mm. These results highlight the potential use of Vis?NIR spectroscopy in studies of soil classification, soil physical behaviour and soil physical fertility and environmental studies, principally by a new method of analysing bulk density and structure of soil directly from the soil spectra, without the need for predictive models. As well as spectra, RICIE,IKa and IGb can be used to characterise the different structural features of Ferralsols. 650 $aSoil structure 650 $aEstrutura do Solo 650 $aLatossolo 653 $aDiffuse reflectance spectroscopy 653 $aEspectroscopia de refletância difusa 653 $aLatosol 653 $aMicroped 653 $aSoil mineral 653 $aSolo mineral 700 1 $aBROSSARD, M. 700 1 $aCORAZZA, E. J. 700 1 $aMARCHAO, R. L. 700 1 $aGUIMARÃES, M. de F. 773 $tJournal of Near Infrared Spectroscopy$gv. 24, n. 3, p. 243-254, March 2016.
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