The sampling on the rubber tree nursery experimentation
Autor(a) principal: | |
---|---|
Data de Publicação: | 2014 |
Outros Autores: | , |
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. |
id |
EMBRAPA-4_2784a216d57b0f25f2f792f59267feb1 |
---|---|
oai_identifier_str |
oai:ojs.seer.sct.embrapa.br:article/14925 |
network_acronym_str |
EMBRAPA-4 |
network_name_str |
Pesquisa Agropecuária Brasileira (Online) |
repository_id_str |
|
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 |
_version_ |
1793416656100261888 |