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Registro Completo |
Biblioteca(s): |
Embrapa Florestas. |
Data corrente: |
10/06/2002 |
Data da última atualização: |
10/06/2002 |
Autoria: |
DIAS, H. C. T.; ANDRADE, L. A. de; MATIAS, S. S. R.; SATO, A. Y.; SOUZA, A. P. de. |
Título: |
Dinâmica de nutrientes e enraizamento de estacas de Celtris sp. |
Ano de publicação: |
2002 |
Fonte/Imprenta: |
Revista Árvore, Viçosa, v. 26, n. 1, p. 7-12, jan./fev. 2002. |
Idioma: |
Português |
Palavras-Chave: |
Dry matter weight; Espécies autóctones; Estaquia; Indigenous organisms; Peso de matéria seca. |
Thesagro: |
Diâmetro. |
Thesaurus Nal: |
cutting; diameter. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00709naa a2200253 a 4500 001 1305956 005 2002-06-10 008 2002 bl uuuu u00u1 u #d 100 1 $aDIAS, H. C. T. 245 $aDinâmica de nutrientes e enraizamento de estacas de Celtris sp. 260 $c2002 650 $acutting 650 $adiameter 650 $aDiâmetro 653 $aDry matter weight 653 $aEspécies autóctones 653 $aEstaquia 653 $aIndigenous organisms 653 $aPeso de matéria seca 700 1 $aANDRADE, L. A. de 700 1 $aMATIAS, S. S. R. 700 1 $aSATO, A. Y. 700 1 $aSOUZA, A. P. de 773 $tRevista Árvore, Viçosa$gv. 26, n. 1, p. 7-12, jan./fev. 2002.
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Embrapa Florestas (CNPF) |
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Registro Completo
Biblioteca(s): |
Embrapa Instrumentação; Embrapa Soja. |
Data corrente: |
07/06/2022 |
Data da última atualização: |
07/06/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
VAZ, C. M. P.; RESENDE, J. M. de; FRANCHINI, J. C.; DEBIASI, H.; NUNES, M. R. |
Afiliação: |
CARLOS MANOEL PEDRO VAZ, CNPDIA; JULIO CEZAR FRANCHINI DOS SANTOS, CNPSO; HENRIQUE DEBIASI, CNPSO. |
Título: |
Evaluation and recommendations for the use of dynamic penetrometers. |
Ano de publicação: |
2022 |
Fonte/Imprenta: |
Soil & Tillage Research, v. 220, 105373, 2022. |
ISSN: |
0167-1987 |
DOI: |
https://doi.org/10.1016/j.still.2022.105373 |
Idioma: |
Inglês |
Conteúdo: |
Dynamic penetrometers are largely used for studies of soil compaction caused by agricultural practices. In this paper, some critical factors affecting precision, operation time, and ease of use of dynamic penetrometers were evaluated. An alternative procedure recording the number of strikes for pre-defined layers (NL) was proposed and compared to the conventional procedure that records depths per strike (Dn). Mass and falling height variability of commercial penetrometers were assessed and the effects on the penetration resistance (PR) equations were evaluated. Comparisons between dynamic and static penetrometers were performed for soils of different textures and a device to extract dynamic penetrometers from very compacted soils was proposed. The alternative procedure-NL presented no statistical difference to the conventional procedure-Dn, shorter acquisition times and simple data post-processing, which was recommended for routine analysis. Mass and falling height variability of 22 Stolf/IAA penetrometers significantly impacted the equations to calculate PR, with variations from − 5 to +10% compared to the standard equation. Thus, users should utilize their own equations to transform raw data in PR. The dynamic penetrometer performance was significantly affected by soil texture as compared to the static penetrometer. The puller device was effective for extracting the dynamic penetrometers from soils with PR higher than 5 MPa |
Palavras-Chave: |
Penetration resistance; Penetrometer; Puller device. |
Thesagro: |
Compactação do Solo; Resistência. |
Thesaurus NAL: |
Oxisols; Penetrometers; Resistance to penetration; Soil compaction. |
Categoria do assunto: |
-- X Pesquisa, Tecnologia e Engenharia |
Marc: |
LEADER 02324naa a2200301 a 4500 001 2143833 005 2022-06-07 008 2022 bl uuuu u00u1 u #d 022 $a0167-1987 024 7 $ahttps://doi.org/10.1016/j.still.2022.105373$2DOI 100 1 $aVAZ, C. M. P. 245 $aEvaluation and recommendations for the use of dynamic penetrometers.$h[electronic resource] 260 $c2022 520 $aDynamic penetrometers are largely used for studies of soil compaction caused by agricultural practices. In this paper, some critical factors affecting precision, operation time, and ease of use of dynamic penetrometers were evaluated. An alternative procedure recording the number of strikes for pre-defined layers (NL) was proposed and compared to the conventional procedure that records depths per strike (Dn). Mass and falling height variability of commercial penetrometers were assessed and the effects on the penetration resistance (PR) equations were evaluated. Comparisons between dynamic and static penetrometers were performed for soils of different textures and a device to extract dynamic penetrometers from very compacted soils was proposed. The alternative procedure-NL presented no statistical difference to the conventional procedure-Dn, shorter acquisition times and simple data post-processing, which was recommended for routine analysis. Mass and falling height variability of 22 Stolf/IAA penetrometers significantly impacted the equations to calculate PR, with variations from − 5 to +10% compared to the standard equation. Thus, users should utilize their own equations to transform raw data in PR. The dynamic penetrometer performance was significantly affected by soil texture as compared to the static penetrometer. The puller device was effective for extracting the dynamic penetrometers from soils with PR higher than 5 MPa 650 $aOxisols 650 $aPenetrometers 650 $aResistance to penetration 650 $aSoil compaction 650 $aCompactação do Solo 650 $aResistência 653 $aPenetration resistance 653 $aPenetrometer 653 $aPuller device 700 1 $aRESENDE, J. M. de 700 1 $aFRANCHINI, J. C. 700 1 $aDEBIASI, H. 700 1 $aNUNES, M. R. 773 $tSoil & Tillage Research$gv. 220, 105373, 2022.
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