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| Silva,Anderson Rodrigo da; Lima,Renato Paiva de. |
| ABSTRACT There are many methods for determining precompression stress (σp), whose value is affected by the slope of the soil compression curve. This study was designed to evaluate the hypothesis that for a certain compression curve all methods used to determine σp present the same value and accuracy. The aim of this study was to compare the accuracy and the relationship among seven of these methods by computational simulation of soil compression curves under nine scenarios. The following methods were used: Casagrande, Pacheco Silva, intersection of the initial void ratio with the virgin compression line (VCLzero), and the regression methods based on 2 (reg1), 3 (reg2), 4 (reg3), and 5 (reg4) points for modeling the elastic curve. Under each scenario,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil stress; Soil compression curve; Soil compaction. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100413 |
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| Silva,Danilo Fernando Guimarães; Coelho,Caroline de Jesus; Romanek,Cristiane; Gardingo,José Raulindo; Silva,Anderson Rodrigo da; Graczyki,Brenda Luiza; Oliveira,Eduardo Augusto Teixeira; Matiello,Rodrigo Rodrigues. |
| ABSTRACT The present study aimed to estimate the genetic divergence among corn half-sib progenies seeking to direct recombination between contrasting and superior progenies for green corn production. Ninety-six progenies were evaluated in a randomized block design with 3 replications, and 18 characteristics associated with agronomic adaptation and green corn yield were measured. The genetic divergence was estimated using generalized square Mahalanobis distance and the progenies grouped by UPGMA and Tocher’s methods. The joint analysis of variance showed genetic variability among the progenies for the characteristics evaluated. The UPGMA method was more sensitive than Tocher’s, since it led to the formation of 11 groups genetically dissimilar compared to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; Ears yield; Potential; UPGMA; Tocher. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000400401 |
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| Silva,Anderson Rodrigo da; Cecon,Paulo Roberto; Dias,Carlos Tadeu dos Santos; Puiatti,Mário; Finger,Fernando Luiz; Carneiro,Antônio Policarpo Souza. |
| Multivariate techniques have become a useful tool for studying the phenotypic diversity of Germplasm Bank accessions, since they make it possible to combine a variety of different information from these accessions. This study aimed to characterize the phenotypic dispersion of garlic (Allium sativum L.) using two multivariate techniques with different objective functions. Twenty accessions were morphologically characterized for bulb diameter, length, and weight; number of cloves per bulb; number of leaves per plant; and leaf area. Techniques based on generalized quadratic distance of Mahalanobis, UPGMA (Unweighted Pair Group Method with Arithmetic Mean) clustering, and nMDS (nonmetrric MultiDimensional Scaling) were applied and the relative importance of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allium sativum L.; NMDS; UPGMA; Genetic divergence. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162014000100005 |
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