Among the factors that influence the detection of minimum significant differences between treatments in conventional experiments is the size of the plot, whose correct determination allows the reduction of experimental error, consequently, increases the precision of the experiment and the reliability of the interpretations and conclusions obtained. There are different methods to estimate the optimal plot size, which relate plot size and residual variation, highlighting among these the methods of maximum curvature, maximum modified curvature, maximum curvature of the coefficient of variation and regression with plateau response. In addition to these, there is the Hatheway method that takes into account factors such as number of treatments, repetitions and levels of significance. Since there is little work to estimate the optimal plot size in experiments with species of the genus Brassica, the present study aimed to increase the experimental precision in experiments with cabbage in the municipality of Alegre - ES by determining the optimal plot size with based on Hatheway's methods, maximum curvature, maximum curvature of the coefficient of variation and plateau regression. The work was carried out by means of a blank test carried out in the experimental area of the Center for Agricultural Sciences of the Federal University of Espírito Santo, Alegre - ES, in which both productive and growth variables were evaluated. At the end of the project, propose the optimal plot size to be used in experiments with cabbage in order to increase the experimental precision and the reliability of the results obtained in future experiments.
Este trabalho teve como objetivo conhecer a cafeicultura praticada na comunidade quilombola de Monte Alegre, localizada na zona rural do município de Cachoeiro de Itapemirim, sul do Estado do Espírito Santo, Brasil. O trabalho foi desenvolvido em duas etapas: serviço de campo e de escritório. No serviço de campo, fez-se o levantamento de algumas características da estrutura fundiária e da cafeicultura praticada no local. No serviço de escritório, foi realizado o mapeamento aéreo da cafeicultura local mediante o uso de Sistema de Informação Geográfica. Verificou-se que a comunidade quilombola de Monte Alegre possui uma área total de 13,37 km² e é formada por 66 estabelecimentos rurais. A cafeicultura ocupa 10,69% da área da comunidade e está presente em 22 estabelecimentos. A variedade mais cultivada é a “tradicional” e o espaçamento mais empregado é de 2,5x1,6 m. O café encontra-se cultivado na sua maioria no modo convencional, sob a forma de monocultivo, conduzido à pleno sol e em regime familiar, com uma produtividade média de 27,77 sacas/ha. Os cultivos consorciados são em minoria, realizado principalmente com carneiro.
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