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Registro Completo |
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Biblioteca(s): |
Embrapa Agroindústria Tropical; Embrapa Amazônia Ocidental. |
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Data corrente: |
06/07/1993 |
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Data da última atualização: |
06/07/1993 |
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Autoria: |
CONRAD, J. P.; VEIHMEYER, F. J. |
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Título: |
Root development and soil moisture. |
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Ano de publicação: |
1929 |
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Fonte/Imprenta: |
Hilgardia, v.4, n.4, p.113-134, May, 1929. |
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Idioma: |
Inglês |
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Conteúdo: |
In all studies on the water relations of plants in which soil moisture is involved, much greater care should be given to the manner of taking the samples and to the interpretation of the results. The use of the moisture equivalent for the reduction of moisture contents to a common basis is suggested. Variations in soil texture that are not interpreted by moisture equivalents or by any other of the so-called soil-moisture constants may be great enough to make the results unreliable unless many samples are taken for each condition investigated. The data in this paper indicate that moisture under rows of grainsorghum plants is apparently extracted in successive zones and the extraction is progressive whenever no material additions of moisture occur during the growing season. The percentages for relative wetness expressed as ratios of soilmoisture contents to their respective moisture equivalents, may be used to indicate the development of roots, and the results of adequate moisture samples, taken at proper times, indicate with a fair degree of accuracy the presence or absence of roots of plants growing on the soil tested. A correlation has been shown to exist under the conditions of this study between the amount of roots and the extent to which the soil has been dried by root activity. The writers reason that if the soil is wet at the beginning of the growing season to the full depth to which roots of plants would normally penetrate, subsequent additions of water by rain or irrigation, unless adverse conditions ... MenosIn all studies on the water relations of plants in which soil moisture is involved, much greater care should be given to the manner of taking the samples and to the interpretation of the results. The use of the moisture equivalent for the reduction of moisture contents to a common basis is suggested. Variations in soil texture that are not interpreted by moisture equivalents or by any other of the so-called soil-moisture constants may be great enough to make the results unreliable unless many samples are taken for each condition investigated. The data in this paper indicate that moisture under rows of grainsorghum plants is apparently extracted in successive zones and the extraction is progressive whenever no material additions of moisture occur during the growing season. The percentages for relative wetness expressed as ratios of soilmoisture contents to their respective moisture equivalents, may be used to indicate the development of roots, and the results of adequate moisture samples, taken at proper times, indicate with a fair degree of accuracy the presence or absence of roots of plants growing on the soil tested. A correlation has been shown to exist under the conditions of this study between the amount of roots and the extent to which the soil has been dried by root activity. The writers reason that if the soil is wet at the beginning of the growing season to the full depth to which roots of plants would normally penetrate, subsequent additions of water by rain or irr... Mostrar Tudo |
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Palavras-Chave: |
Planta - agua - relacao; Planta - transpiracao; Raizes - desenvolvimento - solo - umidade - relacao; Root; Solo - umidade - determinacao. |
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Thesagro: |
Sorgo. |
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Thesaurus Nal: |
soil. |
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Categoria do assunto: |
-- |
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Marc: |
null
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Registro original: |
Embrapa Agroindústria Tropical (CNPAT) |
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Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Meio-Norte. |
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Data corrente: |
12/02/2007 |
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Data da última atualização: |
04/08/2023 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
ROCHA, R. R. C.; COSTA, A. P. R.; NASCIMENTO, H. T. S. do; CARDOSO, F. S.; SANTOS, P. A. C. dos; ALMEIDA, E. C. S. de; OLIVEIRA, L. de S. de. |
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Afiliação: |
RAIMUNDO RÔMULO COSTA ROCHA, UNIVERSIDADE FEDERAL DO PIAUÍ; AMILTON PAULO RAPOSO COSTA, UNIVERSIDADE FEDERAL DO PIAUÍ; HOSTON TOMAS SANTOS DO NASCIMENTO, CPAMN; FRANCIMARNE SOUSA CARDOSO, UNIVERSIDADE FEDERAL DO PIAUÍ; PAULL ANDREWS CARVALHO DOS SANTOS, UNIVERSIDADE FEDERAL DO PIAUÍ; EZEQUIEL CARDOSO SARAIVA DE ALMEIDA, UNIVERSIDADE FEDERAL DO PIAUÍ; LEONARDO DE SOUSA DE OLIVEIRA, UNIVERSIDADE FEDERAL DO PIAUÍ. |
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Título: |
Frequência cardíaca da raças Marota e Saanen no período chuvoso em Teresina-PI. |
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Ano de publicação: |
2005 |
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Fonte/Imprenta: |
In: ENCONTRO DE INICIAÇÃO CIENTIFICA, 1.; PRÊMIO DE INICIAÇÃO CIENTIFICA DA FAPEPI, 1., 2005, [Teresina]. Anais...[Teresina]: FAPEPI, 2005. |
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Descrição Física: |
1 CD-ROM. |
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Idioma: |
Português |
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Palavras-Chave: |
Estresse. |
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Thesagro: |
Caprino; Metabolismo; Raça. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://www.alice.cnptia.embrapa.br/alice/bitstream/doc/68333/1/25.pdf
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Marc: |
null
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Registro original: |
Embrapa Meio-Norte (CPAMN) |
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