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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados; Embrapa Hortaliças. |
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Data corrente: |
03/03/1997 |
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Data da última atualização: |
03/03/1998 |
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Autoria: |
SILVA, E. M. da. |
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Título: |
A test of the independent domain theory for predicting moisture hysteretic paths. |
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Ano de publicação: |
1980 |
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Fonte/Imprenta: |
Davis: University of California, [1980]. |
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Páginas: |
165p. |
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Descrição Física: |
Ms.C. Thesis. |
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Idioma: |
Inglês |
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Conteúdo: |
The conceptual model of hysteresis as proposed by Mualem (1974) was used as means of testing the independent domain theory to describe measured primary scanning curves. Three porus materials were used: Boise sandstone, yolo fine sandy loam, and Aiken clay. Water content values at a given capillary presure head were measured using a statc equilibrium method. The applied pressure increment for reaching each point along a specific characteristic curve was equally spaced. Appreciable water evaporation losses were registered and a correction was utilized to obtein the actual water content values.The measured moisture characteristics varied considerably for each poruous material. The area enclosed between boudary curves benig smaller for sandstone than that for the other materials was an indication that the pore geometry and its radial interconnections was simpler for sandstone than for the natural soils. The comparison between predicted measured scanning curves was better for the sandstone than for soils. In general there was a satisfactory agreement between theory and measured data. The mathematical model used is simple to apply and does not require much computation time for its application. |
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Palavras-Chave: |
Medida; Moisture; Moisture content; Soil water contents; Water availability; Water movement. |
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Thesagro: |
Água; Água do Solo; Modelo Matemático; Movimento; Porosidade; Solo; Umidade; Umidade do Solo. |
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Thesaurus Nal: |
hysteresis; mathematical models; soil; soil pore system; water content. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02122nam a2200349 a 4500
001 1557878
005 1998-03-03
008 1980 bl uuuu m 00u1 u #d
100 1 $aSILVA, E. M. da
245 $aA test of the independent domain theory for predicting moisture hysteretic paths.
260 $aDavis: University of California, [1980].$c1980
300 $a165p.$cMs.C. Thesis.
520 $aThe conceptual model of hysteresis as proposed by Mualem (1974) was used as means of testing the independent domain theory to describe measured primary scanning curves. Three porus materials were used: Boise sandstone, yolo fine sandy loam, and Aiken clay. Water content values at a given capillary presure head were measured using a statc equilibrium method. The applied pressure increment for reaching each point along a specific characteristic curve was equally spaced. Appreciable water evaporation losses were registered and a correction was utilized to obtein the actual water content values.The measured moisture characteristics varied considerably for each poruous material. The area enclosed between boudary curves benig smaller for sandstone than that for the other materials was an indication that the pore geometry and its radial interconnections was simpler for sandstone than for the natural soils. The comparison between predicted measured scanning curves was better for the sandstone than for soils. In general there was a satisfactory agreement between theory and measured data. The mathematical model used is simple to apply and does not require much computation time for its application.
650 $ahysteresis
650 $amathematical models
650 $asoil
650 $asoil pore system
650 $awater content
650 $aÁgua
650 $aÁgua do Solo
650 $aModelo Matemático
650 $aMovimento
650 $aPorosidade
650 $aSolo
650 $aUmidade
650 $aUmidade do Solo
653 $aMedida
653 $aMoisture
653 $aMoisture content
653 $aSoil water contents
653 $aWater availability
653 $aWater movement
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Registro original: |
Embrapa Cerrados (CPAC) |
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| 81. |  | MORAES, M. F.; NUTTI, M. R.; WATANABE, E.; CARVALHO, J. L. V. de. Práticas agronômicas para aumentar o fornecimento de nutrientes e vitaminas nos produtos agrícolas alimentares. In: SIMPÓSIO BRASILEIRO DE AGROPECUÁRIA SUSTENTÁVEL, 1., 2009, Viçosa, MG. Agricultura, pecuária e cooperativismo: anais. Viçosa, MG: Universidade Federal de Viçosa, 2009. p. 298-312.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Agroindústria de Alimentos. |
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| 82. | | ASCHERI, J. L. R.; CARVALHO, C. W. P.; MATSUURA, F.; CARVALHO, J. L. V. Producao de pellets a partir de tres cultivares de farinha de mandioca. In: CONGRESSO BRASILEIRO DE CIENCIA E TECNOLOGIA DE ALIMENTOS, 16., 1998, Rio de Janeiro, RJ. Anais... Rio de Janeiro: SBCTA, 1998. v.3, p.1963-1966.| Biblioteca(s): Embrapa Agroindústria de Alimentos. |
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| 89. | | BECHOFF, A.; TALEON, V.; CARVALHO, L. M. J.; CARVALHO, J. L. V. de; BOY, E. Micronutrient (provitamin a and iron/zinc) retention in biofortified crops. African Journal Food Agriculture, Nutrition and Development, v. 17, n. 2, p. 11893-11904, 2017. Special Issue devoted to Biofortification| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Agroindústria de Alimentos. |
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| Registros recuperados : 510 | |
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