Resumo
This paper continues the statistical analysis of a coffee varietal trial at Campinas (1, 2, 3), utilising the data of a further period of 4 years. Variety D (Yellow Bourbon) has now drawn significantly ahead of C (Bourbon) as is shown by fig. 1 compared with fig. 2b of reference (3). This possibility was foreseen at the time of the earlier analysis (3), from a consideration of the annual rates of increase of yield. This is of interest to the general problem of selection of perennial plants, because it shows that not only average yield but also rate of increase of yield is a useful criterion for selection.
Analise estatística do ensaio de variedades de café : parte II
A. Morales
Assistente da Cadeira de Estatística Matemática e Demográfica, Faculdade de Ciências Econômicas e Administrativas da Universidade de São Paulo
SUMMARY
This paper continues the statistical analysis of a coffee varietal trial at Campinas (1, 2, 3), utilising the data of a further period of 4 years.
Variety D (Yellow Bourbon) has now drawn significantly ahead of C (Bourbon) as is shown by fig. 1 compared with fig. 2b of reference (3). This possibility was foreseen at the time of the earlier analysis (3), from a consideration of the annual rates of increase of yield. This is of interest to the general problem of selection of perennial plants, because it shows that not only average yield but also rate of increase of yield is a useful criterion for selection.
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LITERATURA CITADA
- 1. Mendes, J. E. T. Ensaio de variedades de cafeeiros II. Bragantia 9: 1-101. 1949.
- 2. Mendes, J. E. T. Ensaio de variedades de cafeeiros III. Bragantia 11: 29-43, fig. 1. 1951.
- 3. Stevens, W. L. Análise estatística do ensaio de variedades de café. Bragatina : 9: 103-123. 1949.
Datas de Publicação
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Publicação nesta coleção
25 Maio 2010 -
Data do Fascículo
Mar 1951
