ANALYSIS OF VARIANCE PRECISION FOR INDICES USED IN INTERCROPPING EXPERIMENTS
Euclides Braga MALHEIROS[1]
Dilermando PERECIN1
§
ABSTRACT: The use of indices is
an usual practice, in the studing intercropping efficiency compared with sole
crop. The problem is the distribution of these indices, making the analysis of
variance not always be exact. The analysis of variance precision for three
indices (RC –Competitive Ratio; K –Relative crowding and A –Agressivity) were
compared by simulated data obtained in computer. These precisions were compared
with the standardizations by the mean of the LER indice, inter and intrablocks,
too. Results show that analysis of variance was completely imprecise for the RC
and K indices, and it didn’t happen for the other studied indices.
§
KEYWORDS: Indices for
intercropping; standardizations by the mean; analysis of variance precision.
[1]Departamento de Ciências Exatas da Faculdade de Ciências Agrárias e Veterinárias - UNESP- 14870-000 - Jaboticabal - SP