SBICafé
Biblioteca do Café

Análise do ensaio de desbaste de ramos inferiores do cafeeiro

Mostrar registro simples

dc.contributor.author Stevens, W. L.
dc.contributor.author Fraga Jr., C. G.
dc.date.accessioned 2019-01-21T11:07:09Z
dc.date.available 2019-01-21T11:07:09Z
dc.date.issued 1951-10
dc.identifier.citation STEVENS, W. L.; FRAGA JR., C. G. Análise do ensaio de desbaste de ramos inferiores do cafeeiro. Bragantia, Campinas, v. 11, n. 10-12, p. 285-289, out./dez., 1951. pt_BR
dc.identifier.issn 1678-4499
dc.identifier.uri http://dx.doi.org/10.1590/S0006-87051951000400003 pt_BR
dc.identifier.uri http://www.sbicafe.ufv.br/handle/123456789/11003
dc.description.abstract This paper was written primarily to illustrate the process of fitting constants to non-orthogonal data. The design of the experiment, on the pruning of lower branches of coffee-trees, was systematic (see plan at the beginning). Three constants were fitted, representing respectively the treatment contrast, the difference between upper and lower half of the field and the linear gradient of fertility across the field. The use of the residual sum of squares for the estimation of error is not, of course, logically correct but it is unlikely to lead to seriously wrong conclusions if caution is exercised. In the event, the procedure failed to eliminate any soil heterogeneity (see Analysis of Variance, p. 288). Inspection of the data showed that much of the heterogeneity would have appeared in a quadratic term in the gradient. When, as here, the number of data is very small, it is particularly dangerous to allow the data to suggest the scheme of adjustment, because this will lead to an over-estimation of the precision of the experiment. The conclusion was that not pruning the lower branches of tree gave an increase in yield of 104 ± 50 kg (dry fruits) per plot, with a general mean of 743 kg per plot. pt_BR
dc.format pdf pt_BR
dc.language.iso pt_BR pt_BR
dc.publisher Instituto Agronômico (IAC) pt_BR
dc.relation.ispartofseries Bragantia;v. 11, n. 10-12, p. 285-289,1951;
dc.rights Open Access pt_BR
dc.subject.classification Cafeicultura::Implantação e manejo da lavoura pt_BR
dc.title Análise do ensaio de desbaste de ramos inferiores do cafeeiro pt_BR
dc.type Artigo pt_BR

Arquivos deste item

Arquivos Tamanho Formato Visualização
Bragantia_v. 11_n. 10-12_p. 285 - 289_1951.pdf 206.6Kb application/pdf Visualizar/Abrir ou Pre-visualizar

Este item aparece na(s) seguinte(s) coleção(s)

  • Bragantia [359]
    Artigos relacionados a Cafeicultura

Mostrar registro simples

Buscar em toda a Biblioteca


Sobre o SBICafé

Navegar

Minha conta