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Registro Completo |
Biblioteca(s): |
Embrapa Milho e Sorgo. |
Data corrente: |
26/08/2021 |
Data da última atualização: |
26/08/2021 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
FERREIRA, Q. de C. G.; BACELLAR, L. de A. P.; VIANA, J. H. M. |
Afiliação: |
QUENIA DE CASSIA GOULART FERREIRA, Universidade Federal de Ouro Preto; LUIS DE ALMEIDA PRADO BACELLAR, Universidade Federal de Ouro Preto; JOAO HERBERT MOREIRA VIANA, CNPMS. |
Título: |
Evaluation of soil moisture by electrical resistivity in Oxisols of the central Brazilian savanna. |
Ano de publicação: |
2021 |
Fonte/Imprenta: |
Geoderma Regional, v. 26, e00408, 2021. |
DOI: |
https://doi.org/10.1016/j.geodrs.2021.e00408 |
Idioma: |
Inglês |
Conteúdo: |
The determination of the spatial distribution of soil moisture in the field is relevant for many purposes in agriculture and engineering, but it is still a challenge, since standard determination methods have limitations and problems of representativeness. Electrical resistivity may be used with this finality, but this method is still poorly studied for highly weathered tropical soils, which present structural and textural peculiarities. This work aims to present the calibration of the moisture/electrical resistivity relationships for a typical tropical soil, and to evaluate its robustness as a soil moisture prediction method. A highly weathered clay soil (Oxisol), representative of the Brazilian savanna (?Cerrado?), was sampled and the resistivity tests of the A, Bw and C horizons were conducted in a four-electrode cell array. The A and Bw horizons of clay Oxisols usually present resistivity values greater than temperate soils counterparts, which can be attributed to the lower content of highly active clays and higher macroporosity. The soil electrical resistivity/volumetric moisture relationship present a nonlinear and inverse trend and the generalized form of Archie?s law has the potential to be applied to determine the water content of these soils. The electrical resistivity/volumetric soil moisture semi-log plot showed a two-step pattern, with a remarkable change in the behavior around the moisture associated to the wilting point. The field validation shows that the use of the electrical resistivity is possible for the measurement of soil moisture and for the subsurface mapping of its horizons. MenosThe determination of the spatial distribution of soil moisture in the field is relevant for many purposes in agriculture and engineering, but it is still a challenge, since standard determination methods have limitations and problems of representativeness. Electrical resistivity may be used with this finality, but this method is still poorly studied for highly weathered tropical soils, which present structural and textural peculiarities. This work aims to present the calibration of the moisture/electrical resistivity relationships for a typical tropical soil, and to evaluate its robustness as a soil moisture prediction method. A highly weathered clay soil (Oxisol), representative of the Brazilian savanna (?Cerrado?), was sampled and the resistivity tests of the A, Bw and C horizons were conducted in a four-electrode cell array. The A and Bw horizons of clay Oxisols usually present resistivity values greater than temperate soils counterparts, which can be attributed to the lower content of highly active clays and higher macroporosity. The soil electrical resistivity/volumetric moisture relationship present a nonlinear and inverse trend and the generalized form of Archie?s law has the potential to be applied to determine the water content of these soils. The electrical resistivity/volumetric soil moisture semi-log plot showed a two-step pattern, with a remarkable change in the behavior around the moisture associated to the wilting point. The field validation shows that the use... Mostrar Tudo |
Palavras-Chave: |
Electrical resistivity; Resistividade elétrica; Soil moisture. |
Thesagro: |
Latossolo; Umidade do Solo. |
Thesaurus Nal: |
Oxisols; Savannas. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 02370naa a2200241 a 4500 001 2133865 005 2021-08-26 008 2021 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1016/j.geodrs.2021.e00408$2DOI 100 1 $aFERREIRA, Q. de C. G. 245 $aEvaluation of soil moisture by electrical resistivity in Oxisols of the central Brazilian savanna.$h[electronic resource] 260 $c2021 520 $aThe determination of the spatial distribution of soil moisture in the field is relevant for many purposes in agriculture and engineering, but it is still a challenge, since standard determination methods have limitations and problems of representativeness. Electrical resistivity may be used with this finality, but this method is still poorly studied for highly weathered tropical soils, which present structural and textural peculiarities. This work aims to present the calibration of the moisture/electrical resistivity relationships for a typical tropical soil, and to evaluate its robustness as a soil moisture prediction method. A highly weathered clay soil (Oxisol), representative of the Brazilian savanna (?Cerrado?), was sampled and the resistivity tests of the A, Bw and C horizons were conducted in a four-electrode cell array. The A and Bw horizons of clay Oxisols usually present resistivity values greater than temperate soils counterparts, which can be attributed to the lower content of highly active clays and higher macroporosity. The soil electrical resistivity/volumetric moisture relationship present a nonlinear and inverse trend and the generalized form of Archie?s law has the potential to be applied to determine the water content of these soils. The electrical resistivity/volumetric soil moisture semi-log plot showed a two-step pattern, with a remarkable change in the behavior around the moisture associated to the wilting point. The field validation shows that the use of the electrical resistivity is possible for the measurement of soil moisture and for the subsurface mapping of its horizons. 650 $aOxisols 650 $aSavannas 650 $aLatossolo 650 $aUmidade do Solo 653 $aElectrical resistivity 653 $aResistividade elétrica 653 $aSoil moisture 700 1 $aBACELLAR, L. de A. P. 700 1 $aVIANA, J. H. M. 773 $tGeoderma Regional$gv. 26, e00408, 2021.
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Registro Completo
Biblioteca(s): |
Embrapa Cerrados. |
Data corrente: |
19/02/2003 |
Data da última atualização: |
19/02/2003 |
Autoria: |
FERREIRA, E. A. B.; RESCK, D. V.; GOMES, A. C.; RAMOS, M. L. D. de. |
Título: |
Dinamica do carbono da biomassa microbiana em cinco profundidades de um latossolo no cerrado sob diferentes sistemas de manejo. |
Ano de publicação: |
2002 |
Fonte/Imprenta: |
In: REUNIAO BRASILEIRA DE FERTILIDADE DO SOLO E NUTRICAO DE PLANTAS, 25.; REUNIAO BRASILEIRA SOBRE MICORRIZAS, 9.; SIMPOSIO BRASILEIRO DE MICROBIOLOGIA DO SOLO, 7.; REUNIAO BRASILEIRA DE BIOLOGIA DO SOLO, 4., 2002, Rio de Janeiro. FertBio 2002: agricultura: bases ecologicas para o desenvolvimento social e economico sustentado. Rio de Janeiro: [s. n.], 2002. |
Páginas: |
nao paginado. |
Idioma: |
Português |
Thesagro: |
Arado de Aiveca; Arado de Disco; Biomassa; Carbono; Cerrado; Manejo do Solo; Plantio Direto; Solo. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01042naa a2200253 a 4500 001 1566290 005 2003-02-19 008 2002 bl uuuu u00u1 u #d 100 1 $aFERREIRA, E. A. B. 245 $aDinamica do carbono da biomassa microbiana em cinco profundidades de um latossolo no cerrado sob diferentes sistemas de manejo. 260 $c2002 300 $anao paginado. 650 $aArado de Aiveca 650 $aArado de Disco 650 $aBiomassa 650 $aCarbono 650 $aCerrado 650 $aManejo do Solo 650 $aPlantio Direto 650 $aSolo 700 1 $aRESCK, D. V. 700 1 $aGOMES, A. C. 700 1 $aRAMOS, M. L. D. de 773 $tIn: REUNIAO BRASILEIRA DE FERTILIDADE DO SOLO E NUTRICAO DE PLANTAS, 25.; REUNIAO BRASILEIRA SOBRE MICORRIZAS, 9.; SIMPOSIO BRASILEIRO DE MICROBIOLOGIA DO SOLO, 7.; REUNIAO BRASILEIRA DE BIOLOGIA DO SOLO, 4., 2002, Rio de Janeiro. FertBio 2002: agricultura: bases ecologicas para o desenvolvimento social e economico sustentado. Rio de Janeiro: [s.$gn.], 2002.
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