Resumo

JARAMILLO JARAMILLO, Daniel Francisco. EFFECT OF SYSTEMATIC VARIABILITY IN FERTILIZATION EXPERIMENTS WITH BEANS. FIRST SOWING. Rev. Fac. Nac. Agron. Medellín [online]. 2005, vol.58, n.1, pp.2717-2732. ISSN 0304-2847.

An evaluation was made of the possible impact of structured variability on the production of two varieties of beans by means of spatial tendency and semi-variography analyses of the results of analyses of variance in an organic fertilization experiment and with micro-organisms, in the first sowing, in a completely randomized experimental design with seven treatments and four replications, conducted in the "La Selva" Research Center of CORPOICA, Rionegro munincipality, eastern Antioquia-Colombia. A differential effect based on bean variety was found of the structured variability on the results of the analyses of variance. In the ICA Viboral variety, the ANOVA conducted on the original data did not show significant treatment effects on production, but upon eliminating spatial tendency and variability components, the ANOVA detected that in fact there were highly significant treatment effects on production. To the contrary, the variety CORPOICA 106 showed no significant treatment effects for neither the original data of with the residuals of the spatial tendency and variability analyses. This pattern resulted both when working with central meter production of the furrow or with the entire furrow. The specific effect of each treatment in the analysis of variance also was distorted upon eliminating spatial components of the variability. Based upon the results of this study, we can recommend that in sites to be used for farm research, detailed studies of soil properties related to production should be made, in which knowledge of its spatial variability is included, so that adequate interpretations of the tests conducted in them may be made.

Palavras-chave : Spatial variability; tendency analysis; analysis of variance; experimental design; bean production.

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