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| Registros recuperados : 21 | |
| 5. |  | DAMASCENO, J. C.; BACCARI JUNIOR, F.; TARGA, L. A. Respostas comportamentais de vacas holandesas, com acesso a sombra constante ou limitada. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 34, n. 4, p. 709-15, abr. 1999 Título em inglês: Behavior responses of holstein dairy cows with constant or limited to shade.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 10. | | MAGDUB, A. B.; BACCARI JUNIOR, F.; GONÇALVES, H. C.; POLASTRE, R. Effects of heat stress on the growth performance of kids. In: INTERNATIONAL CONFERENCE ON GOATS, 4., 1987, Brasília, DF. Proceedings... Brasília, DF: EMBRAPA-DDT, 1987. v. 2. p. 1371. Abstract 99.| Biblioteca(s): Embrapa Caprinos e Ovinos. |
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| 12. | | BONASSI, I. A.; BRASIL, L. H. A.; BACCARI JUNIOR, F.; WECHSLER, F. S. Efeito da temperatura ambiental na composicao proteica do leite de cabra. Revista do Instituto de Laticinios Candido Tostes, v.53, n.304, p.65-71, 1998. Anais do XV Congresso Nacional de Laticinios "Candido Tostes", 1998, Juiz de Fora.| Biblioteca(s): Embrapa Caprinos e Ovinos. |
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| 16. | | BRASIL, L. H. A.; WECHESLER, F. S.; BACCARI JUNIOR, F.; GONÇALVES, H. C.; BONASSI, I. A. Efeitos do estresse térmico sobre a produção, composição química do leite e respostas termorreguladoras de cabras da raça Alpina. Revista Brasileira de Zootecnia, v. 29, n. 6, p. 1632-1641, 2000.| Biblioteca(s): Embrapa Caprinos e Ovinos. |
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| 17. | | BRASIL, L. H. de A.; WECHESLER, F. S.; BACCARI JUNIOR, F.; GONÇALVES, H. C.; BONASSI, I. A. Avaliação da produção e composição mineral do leite de cabras Pardas Alpinas sob estresse térmico. In: CONGRESSO NORDESTINO DE PRODUÇÃO ANIMAL, 1., 1998, Fortaleza. Anais... Fortaleza: Sociedade Nordestina de Produção Animal, 1998. v. 2, p.40.| Biblioteca(s): Embrapa Caprinos e Ovinos. |
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| 18. | | BRASIL, L. H. de A.; WECHSLER, F. S.; BACCARI JUNIOR, F.; GONCALVES, H. C.; BONASSI, I. A. Avaliacao da producao e composicao quimica do leite de cabras Pardas Alpinas sob estresse termico. In: REUNIAO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 35., 1998, Botucatu, SP. Anais... Botucatu: Sociedade Brasileira de Zootecnia, 1998. v.4 p.46-48.| Biblioteca(s): Embrapa Caprinos e Ovinos. |
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| 19. | | BRASIL, L. H. de A.; WECHSLER, F. S.; BACCARI JUNIOR, F.; GONCALVES, H. C.; BONASSI, I. A. Respostas termorreguladoras de cabras Pardas Alpinas submetidas a estresse termico. In: REUNIAO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 35., 1998, Botucatu, SP. Anais... Botucatu: Sociedade Brasileira de Zootecnia, 1998. v.4 p.49-51.| Biblioteca(s): Embrapa Caprinos e Ovinos. |
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| 20. | | BRASIL, L. H. de A.; WECHSLER, F. S.; BACCARI JUNIOR, F.; GONCALVES, H. C.; BONASSI, I. A. Resposta termorreguladoras de cabras pardas alpinas submetidas a estresse termico. In: REUNIAO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 35., 1998, Botucatu, SP. Anais... Botucatu: Sociedade Brasileira de Zootecnia, 1998. v.4 p.49-51.| Biblioteca(s): Embrapa Caprinos e Ovinos. |
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| Registros recuperados : 21 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Solos; Embrapa Solos / UEP-Recife. |
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Data corrente: |
28/08/2023 |
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Data da última atualização: |
06/12/2023 |
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Tipo da produção científica: |
Boletim de Pesquisa e Desenvolvimento |
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Autoria: |
NASCIMENTO, C. W. R. do; CEDDIA, M. B.; VASQUES, G. M.; RODRIGUES, H. M.; MARTINS, S. S.; OLIVEIRA, R. P. de; TAVARES, S. R. de L. |
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Afiliação: |
CARLOS WAGNER RODRIGUES DO NASCIMENTO, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO; MARCOS BACIS CEDDIA, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO; GUSTAVO DE MATTOS VASQUES, CNPS; HUGO MACHADO RODRIGUES, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO; SAULO SIQUEIRA MARTINS, UNIVERSIDADE FEDERAL DO PARÁ; RONALDO PEREIRA DE OLIVEIRA, CNPS; SILVIO ROBERTO DE LUCENA TAVARES, CNPS. |
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Título: |
Identifying soil horizons transitions for ground-truthing and interpreting ground penetrating radar (GPR) imagery of Planosols. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Rio de Janeiro: Embrapa Solos, 2023. |
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Descrição Física: |
E-book. |
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Série: |
(Embrapa Solos. Boletim de pesquisa e desenvolvimento, 285). |
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ISSN: |
1678-0892 |
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Idioma: |
Inglês |
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Conteúdo: |
The Ground Penetrating Radar (GPR) has potential to characterize soils both vertically and horizontally. The effectiveness of using GPR relies on the interpretation of soil targets in the radargrams. For identifying the targets in their correct depths, a velocity model of the terrain is required. However, a velocity model cannot be directly obtained from GPR models using a monostatic antenna. An alternative is the generation of a depth model by measuring the velocity of the electromagnetic pulse from hyperbolas created in the radargram from the interaction of the pulse with point scatterers. On the other hand, the radargram does not always present these point scatterers for the estimation of the pulse velocity and generation of an accurate depth model. Thus, this work aimed to assess the feasibility of using iron rods as markers of the depths of soil horizons transitions in GPR images (750 MHz antenna) of Planosols, and as point scatterers to generate hyperbolas for deriving depth models for converting the Y-axis of the radargram from time to depth units. The experimental area is located in Seropédica municipality, southeastern Brazil. Three soil profiles were described and classified as Planosols, which were located at the footslope position. Iron rods (80-cm long by 8-mm in diameter) were inserted horizontally in the transitions of the soil horizons. Images (radargrams) were obtained using a GPR with a monostatic shielded antenna of 750 MHz frequency. The radargrams were pre-processed using static correction and dewow to remove noise. The pulse velocity was estimated by fitting the hyperbolas generated by the buried iron rods. As results, the 750 MHz antenna allowed visualizing the iron rods features (hyperbolas), especially in sandier horizons in the radargrams. Pulse velocity estimation was possible, which allowed the time-to-depth conversion of the Y-axis, and thus, positioning vertically the horizons transitions in the radargrams. In Planosols, the vertical and horizontal distribution of the E-to-B horizon transitions, as imaged by the GPR, is important information for irrigation planning, land zoning and soil survey. MenosThe Ground Penetrating Radar (GPR) has potential to characterize soils both vertically and horizontally. The effectiveness of using GPR relies on the interpretation of soil targets in the radargrams. For identifying the targets in their correct depths, a velocity model of the terrain is required. However, a velocity model cannot be directly obtained from GPR models using a monostatic antenna. An alternative is the generation of a depth model by measuring the velocity of the electromagnetic pulse from hyperbolas created in the radargram from the interaction of the pulse with point scatterers. On the other hand, the radargram does not always present these point scatterers for the estimation of the pulse velocity and generation of an accurate depth model. Thus, this work aimed to assess the feasibility of using iron rods as markers of the depths of soil horizons transitions in GPR images (750 MHz antenna) of Planosols, and as point scatterers to generate hyperbolas for deriving depth models for converting the Y-axis of the radargram from time to depth units. The experimental area is located in Seropédica municipality, southeastern Brazil. Three soil profiles were described and classified as Planosols, which were located at the footslope position. Iron rods (80-cm long by 8-mm in diameter) were inserted horizontally in the transitions of the soil horizons. Images (radargrams) were obtained using a GPR with a monostatic shielded antenna of 750 MHz frequency. The radargrams were p... Mostrar Tudo |
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Palavras-Chave: |
Dielectric constant; Exploration geophysics; Iron rods; Poximal soil sensing; Sensoriamento proximal do solo. |
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Thesagro: |
Horizonte; Solo. |
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Thesaurus NAL: |
Soil horizons. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1156146/1/CNPS-BPD-285-2023.epub
|
|
Marc: |
LEADER 03146nam a2200313 a 4500
001 2156146
005 2023-12-06
008 2023 bl uuuu u0uu1 u #d
022 $a1678-0892
100 1 $aNASCIMENTO, C. W. R. do
245 $aIdentifying soil horizons transitions for ground-truthing and interpreting ground penetrating radar (GPR) imagery of Planosols.$h[electronic resource]
260 $aRio de Janeiro: Embrapa Solos$c2023
300 $cE-book.
490 $a(Embrapa Solos. Boletim de pesquisa e desenvolvimento, 285).
520 $aThe Ground Penetrating Radar (GPR) has potential to characterize soils both vertically and horizontally. The effectiveness of using GPR relies on the interpretation of soil targets in the radargrams. For identifying the targets in their correct depths, a velocity model of the terrain is required. However, a velocity model cannot be directly obtained from GPR models using a monostatic antenna. An alternative is the generation of a depth model by measuring the velocity of the electromagnetic pulse from hyperbolas created in the radargram from the interaction of the pulse with point scatterers. On the other hand, the radargram does not always present these point scatterers for the estimation of the pulse velocity and generation of an accurate depth model. Thus, this work aimed to assess the feasibility of using iron rods as markers of the depths of soil horizons transitions in GPR images (750 MHz antenna) of Planosols, and as point scatterers to generate hyperbolas for deriving depth models for converting the Y-axis of the radargram from time to depth units. The experimental area is located in Seropédica municipality, southeastern Brazil. Three soil profiles were described and classified as Planosols, which were located at the footslope position. Iron rods (80-cm long by 8-mm in diameter) were inserted horizontally in the transitions of the soil horizons. Images (radargrams) were obtained using a GPR with a monostatic shielded antenna of 750 MHz frequency. The radargrams were pre-processed using static correction and dewow to remove noise. The pulse velocity was estimated by fitting the hyperbolas generated by the buried iron rods. As results, the 750 MHz antenna allowed visualizing the iron rods features (hyperbolas), especially in sandier horizons in the radargrams. Pulse velocity estimation was possible, which allowed the time-to-depth conversion of the Y-axis, and thus, positioning vertically the horizons transitions in the radargrams. In Planosols, the vertical and horizontal distribution of the E-to-B horizon transitions, as imaged by the GPR, is important information for irrigation planning, land zoning and soil survey.
650 $aSoil horizons
650 $aHorizonte
650 $aSolo
653 $aDielectric constant
653 $aExploration geophysics
653 $aIron rods
653 $aPoximal soil sensing
653 $aSensoriamento proximal do solo
700 1 $aCEDDIA, M. B.
700 1 $aVASQUES, G. M.
700 1 $aRODRIGUES, H. M.
700 1 $aMARTINS, S. S.
700 1 $aOLIVEIRA, R. P. de
700 1 $aTAVARES, S. R. de L.
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Embrapa Solos (CNPS) |
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