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Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
22/12/1999 |
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Data da última atualização: |
18/01/2013 |
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Autoria: |
OLIVEIRA, J. C. M.; VAZ, C. M. P.; REICHARDT, K.; SWARTZENDRUBER, D. |
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Afiliação: |
USP-CENA; EMBRAPA-CNPDIA; University of Nebraska, Department of Agronomy. |
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Título: |
Improved soil particle-size analysis by gamma-ray attenuation. |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
Soil Science Society of America Journal, Madison, v. 61, n. 1, p. 23-26, Jan./Feb. 1997. |
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Idioma: |
Inglês |
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Conteúdo: |
The size distribution of particles is useful for physical characterization of soil. This study was conducted to determine whether a new method of soil particle-size analysis by gamma-ray attenuation could be further improved by changing the depth and time of measurement of the suspended particle concentration during sedimentation. In addition to the advantage of nondestructive, undisturbed measurement by gamma-ray attenuation, as compared with conventional pipette or hydrometer methods, the modifications here suggested and employed do substantially decrease the total time for analysis, and will also facilitate total automation and generalize the method for other sedimentation studies. Experimental results are presented for three different Brazilian soil materials, and illustrate the nature of the fine detail provided in the cumulative particle-size distribution as given by measurements obtained during the relatively short time period of 28 min. |
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Palavras-Chave: |
Agricultural instrumentation; Atenuacao por raio gama; Gamma-ray attenuation; Instrumentacao agropecuaria; Particle-size; Particula; Techniques; Tecnicas. |
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Thesagro: |
Solo; Tamanho. |
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Thesaurus NAL: |
soil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01773naa a2200289 a 4500
001 1026426
005 2013-01-18
008 1997 bl --- 0-- u #d
100 1 $aOLIVEIRA, J. C. M.
245 $aImproved soil particle-size analysis by gamma-ray attenuation.
260 $c1997
520 $aThe size distribution of particles is useful for physical characterization of soil. This study was conducted to determine whether a new method of soil particle-size analysis by gamma-ray attenuation could be further improved by changing the depth and time of measurement of the suspended particle concentration during sedimentation. In addition to the advantage of nondestructive, undisturbed measurement by gamma-ray attenuation, as compared with conventional pipette or hydrometer methods, the modifications here suggested and employed do substantially decrease the total time for analysis, and will also facilitate total automation and generalize the method for other sedimentation studies. Experimental results are presented for three different Brazilian soil materials, and illustrate the nature of the fine detail provided in the cumulative particle-size distribution as given by measurements obtained during the relatively short time period of 28 min.
650 $asoil
650 $aSolo
650 $aTamanho
653 $aAgricultural instrumentation
653 $aAtenuacao por raio gama
653 $aGamma-ray attenuation
653 $aInstrumentacao agropecuaria
653 $aParticle-size
653 $aParticula
653 $aTechniques
653 $aTecnicas
700 1 $aVAZ, C. M. P.
700 1 $aREICHARDT, K.
700 1 $aSWARTZENDRUBER, D.
773 $tSoil Science Society of America Journal, Madison$gv. 61, n. 1, p. 23-26, Jan./Feb. 1997.
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Embrapa Instrumentação (CNPDIA) |
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