SciELO - Scientific Electronic Library Online

vol.37 issue9Morphological components and forage production of oat (Avena strigosa, Schreb) and annual ryegrass (Lolium multiflorum, Lam) pasture managed at different heightsSwine deep bedding amendment and legume sod-seeding to increase production and quality of natural pasture author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Revista Brasileira de Zootecnia

Print version ISSN 1516-3598On-line version ISSN 1806-9290


FREITAS, Alfredo Ribeiro de et al. Exploratory data analysis techniques in cultivars of alfalfa. R. Bras. Zootec. [online]. 2008, vol.37, n.9, pp.1531-1536. ISSN 1516-3598.

The objective was to utilize exploratory data analysis techniques for evaluating dry matter production (DMP) obtained from 16 cuts of 92 accessions of alfalfa (Medicago sativa L.). A significant effect on DMP was observed both within and among cuts; the coefficient of variation ranged from 17.7% (cut 2) to 51.7% (cut 9). The DMP data obtained from 16 cuts of 92 accessions of alfalfa did not fit to the normal distribution. The skewness coefficients were negative for dry matter production data in cuts 1 to 4, 10 to 12, and 14 to 16, while kurtosis coefficients were negative in cuts 1, 9, 10, 12, and 16. Robust estimates of standard deviation obtained from four different methods were different from the traditional standard (S) in all cuts, showing that estimate S should be replaced by these robust estimators in statistical analysis.

Keywords : dry mater production; location tests; robust measures of scale; tests for normality.

        · abstract in Portuguese     · text in Portuguese     · Portuguese ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License