Data/hora: 12/06/2024 06:30:48

Provedor de dados: 	63	
País: 	Brazil	
Título: 	Plot size and experimental precision for sunflower production	
Autores: 	Lorentz,Leandro Homrich; Boligon,Alexandra Augusti; Storck,Lindolfo; Lúcio,Alessandro Dal'Col.	
Data: 	2010-08-01	
Ano: 	2010	
Palavras-chave: 	Helianthus annuus L; Experimental techniques; Number of replications; Experimental design.	
Resumo: 	In order for sunflower cultivation to be economically sustainable, research should be based upon suitable experimental techniques. Since this kind of information is not readily available, the aim of this study was to estimate the seed production heterogeneity index and the optimal experimental plot size, and to verify experimental precision in sunflower experiments. Sunflower seed yield figures for plots of 1-meter rows (0.4 m spacing) were collected. The experiments were carried out in the 2004/05 and 2005/06 growing seasons in a 1-ha area, by marking out 12 randomized blocks (12 uniformity trials) of two rows 48 plots long on land used for commercial production of sunflowers in Bossoroca, state of Rio Grande do Sul, Brazil. Plots of different sizes were simulated and estimates made for the mean, variance and coefficient of variance for each plot size, and the production heterogeneity index, optimal plot size and experimental precision estimated. The sunflower seed production heterogeneity index was high, the plots should be large and the rows are the blocks. The optimal plot size is two 3-meter rows (2.4 m²).	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000400005	
Editor: 	São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"	
Relação: 	10.1590/S0103-90162010000400005	
Formato: 	text/html	
Fonte: 	Scientia Agricola  v.67 n.4 2010	
Fonte: 	info:eu-repo/semantics/openAccess