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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
03/07/1995 |
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Data da última atualização: |
03/07/1995 |
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Autoria: |
DUNCAN, L. W.; EL-MORSHEDY, M. M.; MCSORLEY, R. |
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Afiliação: |
University of Florida; Central Agricultural Pesticide Laboratory; Department of Entomology and Nematology University of Florida. |
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Título: |
Sampling Citrus Fibrous Roots and Tylenchulus semipenetrans. |
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Ano de publicação: |
1994 |
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Fonte/Imprenta: |
Journal of Nematology, v.26, n.4, p.442-451, 1994. |
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ISSN: |
0022-300x |
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Idioma: |
Inglês |
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Conteúdo: |
Sampling precision was investigated for Tylenchulus semipenetrans juveniles and males in soil and females from roots and for citrus fibrous root mass densisty. For the case of two composite samples of 15 cores each, counts of juvenile and male nematodes were estimated to be within 40% of u, at p<0.06(a) in orchads where x >1,500 nematodes/100 cm soil. A similar level of a was estimated for measurements of fibrous root mass density, but at a precision level of 25% u. Desisties of female nematodes were estimated with less precision than juveniles and males. Precision estimates from a general sample plan derived from Taylor'sPower Law were in good agreement with estimates from individual orchards. Two aspects involded in deriving sampling plants for management advisory purposes were investigated. A minimun of five to six preliminary samples were required to appreciably reduce bias toward underestimation of o. The use of a Student's t value rather than a standard normaldeviate in formulae to estimate sample size increased the estimates by an average of three units. Cases in which the use of z rather than Student's t is appropriate for these formulae are discussed. |
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Palavras-Chave: |
Citrus nematode; Taylor's Power Law; Tylenchulus samipenetrabs. |
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Thesaurus Nal: |
sampling. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01740naa a2200205 a 4500
001 1633667
005 1995-07-03
008 1994 bl uuuu u00u1 u #d
022 $a0022-300x
100 1 $aDUNCAN, L. W.
245 $aSampling Citrus Fibrous Roots and Tylenchulus semipenetrans.
260 $c1994
520 $aSampling precision was investigated for Tylenchulus semipenetrans juveniles and males in soil and females from roots and for citrus fibrous root mass densisty. For the case of two composite samples of 15 cores each, counts of juvenile and male nematodes were estimated to be within 40% of u, at p<0.06(a) in orchads where x >1,500 nematodes/100 cm soil. A similar level of a was estimated for measurements of fibrous root mass density, but at a precision level of 25% u. Desisties of female nematodes were estimated with less precision than juveniles and males. Precision estimates from a general sample plan derived from Taylor'sPower Law were in good agreement with estimates from individual orchards. Two aspects involded in deriving sampling plants for management advisory purposes were investigated. A minimun of five to six preliminary samples were required to appreciably reduce bias toward underestimation of o. The use of a Student's t value rather than a standard normaldeviate in formulae to estimate sample size increased the estimates by an average of three units. Cases in which the use of z rather than Student's t is appropriate for these formulae are discussed.
650 $asampling
653 $aCitrus nematode
653 $aTaylor's Power Law
653 $aTylenchulus samipenetrabs
700 1 $aEL-MORSHEDY, M. M.
700 1 $aMCSORLEY, R.
773 $tJournal of Nematology$gv.26, n.4, p.442-451, 1994.
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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Registro Completo
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Biblioteca(s): |
Embrapa Agroindústria Tropical. |
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Data corrente: |
01/07/2016 |
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Data da última atualização: |
22/06/2017 |
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Tipo da produção científica: |
Boletim de Pesquisa e Desenvolvimento |
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Autoria: |
SILVA, L. M. A. e; BRITO, E. S. de; CANUTO, K. M.; ZOCOLO, G. J.; ALVES FILHO, E. de G. |
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Afiliação: |
LORENA MARA ALEXANDRE E SILVA, CNPAT; EDY SOUSA DE BRITO, CNPAT; KIRLEY MARQUES CANUTO, CNPAT; GUILHERME JULIAO ZOCOLO, CNPAT; Elenilson de Godoy Alves Filho, Bacharel em Química, Ph.D. em Química Orgânica, Bolsista de pós-doutorado da Universidade Federal do Ceará-UFC. |
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Título: |
Preparo de amostras para análises por ressonância magnética nuclear. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Fortaleza: Embrapa Agroindústria Tropical, 2016. |
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Páginas: |
18 p. |
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Série: |
(Embrapa Agroindústria Tropical. Boletim de Pesquisa e Desenvolvimento, 113). |
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Idioma: |
Português |
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Palavras-Chave: |
Padronização de protocolos; RMN quantitativa; Tampão fosfato. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/145339/1/BPD16005.pdf
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Marc: |
LEADER 00689nam a2200205 a 4500
001 2048157
005 2017-06-22
008 2016 bl uuuu u0uu1 u #d
100 1 $aSILVA, L. M. A. e
245 $aPreparo de amostras para análises por ressonância magnética nuclear.$h[electronic resource]
260 $aFortaleza: Embrapa Agroindústria Tropical$c2016
300 $a18 p.
490 $a(Embrapa Agroindústria Tropical. Boletim de Pesquisa e Desenvolvimento, 113).
653 $aPadronização de protocolos
653 $aRMN quantitativa
653 $aTampão fosfato
700 1 $aBRITO, E. S. de
700 1 $aCANUTO, K. M.
700 1 $aZOCOLO, G. J.
700 1 $aALVES FILHO, E. de G.
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Embrapa Agroindústria Tropical (CNPAT) |
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