Sampling and sample size in the estimation of maize ear traits

Detalhes bibliográficos
Autor(a) principal: da Silva, Jaeveson
Data de Publicação: 1998
Outros Autores: Sérgio Lima e Silva, Paulo, de Pontes Nunes, Raimundo
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/5030
Resumo: The objective of this study was to evaluate the effects of random and non-random sampling and sample size on estimates and variance analysis for number of grains/ear (NGE), cob length (CL) and cob weight (CW) of ten cultivars. In the random sampling the plants were selected with the aid of a random number table. In the non-random sampling, the sampler tried to be random, but no random mechanism was used. The sample sizes studied were 1, 3, 5, 7, 9, 11, 13 and 15 ears for 26 ears harvested in each plot. The experiment was arranged in a randomized block design with five replications. F-test results for both sampling methods were in agreement for NGE, but not for CL and CW. There were differences between sampling methods for NGE and CW. It was concluded that at least 11 ears must be selected for estimation of the mentioned traits. This number of plants can be easily handled and requires much less labor input than sample sizes.
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spelling Sampling and sample size in the estimation of maize ear traitsAmostragem e tamanho da amostra na estimação de caracteres da espiga do milhoZea mays; grain; cobZea mays; grão; sabugoThe objective of this study was to evaluate the effects of random and non-random sampling and sample size on estimates and variance analysis for number of grains/ear (NGE), cob length (CL) and cob weight (CW) of ten cultivars. In the random sampling the plants were selected with the aid of a random number table. In the non-random sampling, the sampler tried to be random, but no random mechanism was used. The sample sizes studied were 1, 3, 5, 7, 9, 11, 13 and 15 ears for 26 ears harvested in each plot. The experiment was arranged in a randomized block design with five replications. F-test results for both sampling methods were in agreement for NGE, but not for CL and CW. There were differences between sampling methods for NGE and CW. It was concluded that at least 11 ears must be selected for estimation of the mentioned traits. This number of plants can be easily handled and requires much less labor input than sample sizes.O trabalho teve como objetivo avaliar os efeitos das amostragens aleatória e não-aleatória e de tamanhos da amostra sobre as estimativas do número de grãos/espiga (NGE), comprimento (CS) e peso (PS) do sabugo, de dez cultivares de milho, e sobre a análise de variância dos dados. Na amostragem aleatória (A) as espigas foram selecionadas com o auxílio de uma tabela de dígitos aleatórios. Na amostragem não-aleatória (NA), o amostrador procurou ser "aleatório" sem usar, no entanto, nenhum mecanismo de sorteio. Como tamanhos amostrais foram usados 1, 3, 5, 7, 9, 11, 13 e 15 espigas, de um total de 26 espigas produzidas na área útil de cada parcela. Utilizou-se o delineamento de blocos ao acaso com cinco repetições. Os resultados da aplicação do teste F para comparar cultivares são concordantes com os métodos A e NA, quanto a NGE. Nos outros dois caracteres ocorreram discordâncias entre os dois métodos de amostragem, com alguns tamanhos amostrais. Somente houve diferenças entre tamanhos amostrais em relação a PS. Entre métodos de amostragem ocorreram diferenças quanto a NGE e PS. Para estimar os referidos caracteres, é necessário o uso de pelo menos 11 espigas por parcela, a fim de se obterem estimativas com boa precisão experimental, economia de tempo, e recursos financeiros.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária Brasileirada Silva, JaevesonSérgio Lima e Silva, Paulode Pontes Nunes, Raimundo1998-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/5030Pesquisa Agropecuaria Brasileira; v.33, n.12, dez. 1998; 1983-1988Pesquisa Agropecuária Brasileira; v.33, n.12, dez. 1998; 1983-19881678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/5030/7179info:eu-repo/semantics/openAccess2014-12-16T16:23:19Zoai:ojs.seer.sct.embrapa.br:article/5030Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-12-16T16:23:19Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Sampling and sample size in the estimation of maize ear traits
Amostragem e tamanho da amostra na estimação de caracteres da espiga do milho
title Sampling and sample size in the estimation of maize ear traits
spellingShingle Sampling and sample size in the estimation of maize ear traits
da Silva, Jaeveson
Zea mays; grain; cob
Zea mays; grão; sabugo
title_short Sampling and sample size in the estimation of maize ear traits
title_full Sampling and sample size in the estimation of maize ear traits
title_fullStr Sampling and sample size in the estimation of maize ear traits
title_full_unstemmed Sampling and sample size in the estimation of maize ear traits
title_sort Sampling and sample size in the estimation of maize ear traits
author da Silva, Jaeveson
author_facet da Silva, Jaeveson
Sérgio Lima e Silva, Paulo
de Pontes Nunes, Raimundo
author_role author
author2 Sérgio Lima e Silva, Paulo
de Pontes Nunes, Raimundo
author2_role author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv da Silva, Jaeveson
Sérgio Lima e Silva, Paulo
de Pontes Nunes, Raimundo
dc.subject.por.fl_str_mv Zea mays; grain; cob
Zea mays; grão; sabugo
topic Zea mays; grain; cob
Zea mays; grão; sabugo
description The objective of this study was to evaluate the effects of random and non-random sampling and sample size on estimates and variance analysis for number of grains/ear (NGE), cob length (CL) and cob weight (CW) of ten cultivars. In the random sampling the plants were selected with the aid of a random number table. In the non-random sampling, the sampler tried to be random, but no random mechanism was used. The sample sizes studied were 1, 3, 5, 7, 9, 11, 13 and 15 ears for 26 ears harvested in each plot. The experiment was arranged in a randomized block design with five replications. F-test results for both sampling methods were in agreement for NGE, but not for CL and CW. There were differences between sampling methods for NGE and CW. It was concluded that at least 11 ears must be selected for estimation of the mentioned traits. This number of plants can be easily handled and requires much less labor input than sample sizes.
publishDate 1998
dc.date.none.fl_str_mv 1998-12-01
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/5030
url https://seer.sct.embrapa.br/index.php/pab/article/view/5030
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/5030/7179
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.33, n.12, dez. 1998; 1983-1988
Pesquisa Agropecuária Brasileira; v.33, n.12, dez. 1998; 1983-1988
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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