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| Mora,Freddy; Arriagada,Osvin. |
| ABSTRACT The objective of this study was to present a classification proposal for coefficients of variation (CV) in Eucalyptus experiments, aiming at providing a useful tool for experiments involving growth, survival and wood quality traits. Ninety-four studies were selected from a search for peer-reviewed journals yielding a total of 508 data. The CVs were classified as low, moderate, high and very high. The mean, standard deviation, maximum and minimum values, skewness and kurtosis were estimated to describe the distribution shape. The Shapiro-Wilk test confirmed that all variables satisfied the assumption of normality (p < 0.05). The results indicated that the growth traits had the highest variability, being variables strongly affected by the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus spp.; Experimental accuracy; Experimental error; Rank-ordering. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000300263 |
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| Stürmer,Glauber Renato; Cargnelutti Filho,Alberto; Guedes,Jerson Vanderlei Carús; Stacke,Regis Felipe. |
| It is important to quantify the population of stink bugs in the soybean, in order to determine the actions which are necessary for their control to protect the crop from losses in production, together with a reduction in cost and less environmental impact. The objectives of this study were to determine the sample size (the number of sampling points) needed to estimate the average population density of the bugs, and to verify the variability in sample size for the phases and species of the bugs and the phenological stages of the plants. In an area of 6.16 ha of soybeans, a grid of 154 sampling points, spaced 20 × 20 m apart, was laid out. Population-density data were collected for nymphs and adults of the species Dichelops furcatus (Fabricius, 1775),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sample sizing; Experimental error; Pentatomidae. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000100019 |
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| Santos,Daniel; Lúcio,Alessandro Dal’Col; Cargnelutti Filho,Alberto; Lopes,Sidinei José; Olivoto,Tiago. |
| ABSTRACT The variability within rows of cultivation may reduce the accuracy of experiments conducted in a complete randomized block design if the rows are considered as blocks, however, little is known about this variability in protected environments. Thus, our aim was to study the variability of the fresh mass in lettuce shoot, growing in protected environment, and to verify the border effect and size of the experimental unit in minimizing the productive variability. Data from two uniformity trials carried out in a greenhouse in autumn and spring growing seasons were used. In the statistical analyses, it was considered the existence of parallel cultivation rows the lateral openings of the greenhouse and of columns perpendicular to these openings.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Experimental accuracy; Experimental design; Experimental error; Lactuca sativa L.; Greenhouse. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000200230 |
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