The sampling on the rubber tree nursery experimentation

Detalhes bibliográficos
Autor(a) principal: Rossetti, Adroaldo Guimarães
Data de Publicação: 2014
Outros Autores: Pereira, Ailton Vitor, Gomes, Frederico Pimentel
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Agropecuária Brasileira (Online)
Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/14925
Resumo: The present work was carried out with the objective of estimating the number of seedlings for sampling in rubber tree (Hevea spp) nursery experiments, originated from jungle seeds, so as to keep the variance to a minimum. The study was based on data from a density trial with twelve spacings, utilizing only the results of the best six treatments. The ideal sample size is that which estimates fie minimum mean variance. The minimum variance of the variables studied was obtained when four planting rows were taken as a sampling unit, expressing fie least coefficient of variation. The mean variance of fie sample practically stabilized when 'n' > twelve plants were distributed throughout the sampling unit. The coefficients of variation obtained were 3.92% for plant height, and 4.07% for stem diameter, for samples of competitives plants. The confidence interval estimated gives an idea of the experimental accuracy.
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spelling The sampling on the rubber tree nursery experimentationA amostragem na experimentação em viveiro de seringueiraHevea; variance of mean; coefficient of variation; confidence intervalHevea; variância da média; coeficiente de variação; intervalo de confiançaThe present work was carried out with the objective of estimating the number of seedlings for sampling in rubber tree (Hevea spp) nursery experiments, originated from jungle seeds, so as to keep the variance to a minimum. The study was based on data from a density trial with twelve spacings, utilizing only the results of the best six treatments. The ideal sample size is that which estimates fie minimum mean variance. The minimum variance of the variables studied was obtained when four planting rows were taken as a sampling unit, expressing fie least coefficient of variation. The mean variance of fie sample practically stabilized when 'n' > twelve plants were distributed throughout the sampling unit. The coefficients of variation obtained were 3.92% for plant height, and 4.07% for stem diameter, for samples of competitives plants. The confidence interval estimated gives an idea of the experimental accuracy.O presente trabalho foi realizado como objetivo de estimar o tamanho da amostra de plantas a serem mensuradas em experimentos de viveiro de seringueira Hevea spp formado de sementes oriundas de seringais nativos da Amazônia, de tal maneira que a variância seja a mínima possível. O estudo foi baseado em dados de um experimento de competição de doze espaçamentos, dos quais utilizaram-se os seis que deram melhores resultados. O tamanho ideal da amostra é aquele cuja estimativa de variância da média V(mn) é a mínima possível. A variância mínima, para as variáveis estudadas, ocorreu quando foram tomadas quatro linhas como unidade amostral expressando os menores coeficientes de variação. A variância da média da amostra praticamente estabilizou-se a partir de n > doze plantas distribuídas por toda a unidade amostral, fornecendo coeficientes de variação da ordem de 3,92% para altura da planta e 4,07% para diâmetro do caule, quando foram amostradas plantas competitivas da unidade amostral. A estimativa do intervalo de confiança dá uma idéia da precisão com que se está trabalhando.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraRossetti, Adroaldo GuimarãesPereira, Ailton VitorGomes, Frederico Pimentel2014-04-17info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/14925Pesquisa Agropecuaria Brasileira; v.21, n.8, ago. 1986; 837 - 841Pesquisa Agropecuária Brasileira; v.21, n.8, ago. 1986; 837 - 8411678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/14925/8627info:eu-repo/semantics/openAccess2014-10-29T17:16:45Zoai:ojs.seer.sct.embrapa.br:article/14925Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-10-29T17:16:45Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv The sampling on the rubber tree nursery experimentation
A amostragem na experimentação em viveiro de seringueira
title The sampling on the rubber tree nursery experimentation
spellingShingle The sampling on the rubber tree nursery experimentation
Rossetti, Adroaldo Guimarães
Hevea; variance of mean; coefficient of variation; confidence interval
Hevea; variância da média; coeficiente de variação; intervalo de confiança
title_short The sampling on the rubber tree nursery experimentation
title_full The sampling on the rubber tree nursery experimentation
title_fullStr The sampling on the rubber tree nursery experimentation
title_full_unstemmed The sampling on the rubber tree nursery experimentation
title_sort The sampling on the rubber tree nursery experimentation
author Rossetti, Adroaldo Guimarães
author_facet Rossetti, Adroaldo Guimarães
Pereira, Ailton Vitor
Gomes, Frederico Pimentel
author_role author
author2 Pereira, Ailton Vitor
Gomes, Frederico Pimentel
author2_role author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Rossetti, Adroaldo Guimarães
Pereira, Ailton Vitor
Gomes, Frederico Pimentel
dc.subject.por.fl_str_mv Hevea; variance of mean; coefficient of variation; confidence interval
Hevea; variância da média; coeficiente de variação; intervalo de confiança
topic Hevea; variance of mean; coefficient of variation; confidence interval
Hevea; variância da média; coeficiente de variação; intervalo de confiança
description The present work was carried out with the objective of estimating the number of seedlings for sampling in rubber tree (Hevea spp) nursery experiments, originated from jungle seeds, so as to keep the variance to a minimum. The study was based on data from a density trial with twelve spacings, utilizing only the results of the best six treatments. The ideal sample size is that which estimates fie minimum mean variance. The minimum variance of the variables studied was obtained when four planting rows were taken as a sampling unit, expressing fie least coefficient of variation. The mean variance of fie sample practically stabilized when 'n' > twelve plants were distributed throughout the sampling unit. The coefficients of variation obtained were 3.92% for plant height, and 4.07% for stem diameter, for samples of competitives plants. The confidence interval estimated gives an idea of the experimental accuracy.
publishDate 2014
dc.date.none.fl_str_mv 2014-04-17
dc.type.none.fl_str_mv
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/14925
url https://seer.sct.embrapa.br/index.php/pab/article/view/14925
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/14925/8627
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
dc.source.none.fl_str_mv Pesquisa Agropecuaria Brasileira; v.21, n.8, ago. 1986; 837 - 841
Pesquisa Agropecuária Brasileira; v.21, n.8, ago. 1986; 837 - 841
1678-3921
0100-104x
reponame:Pesquisa Agropecuária Brasileira (Online)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Pesquisa Agropecuária Brasileira (Online)
collection Pesquisa Agropecuária Brasileira (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv pab@sct.embrapa.br || sct.pab@embrapa.br
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