“…To obtain the adequate plot size, are described in literature dozens of methodologies, and among these are distinguished by their frequent use, currently, the maximum modified curvature, according to Meier and Lessman (1970), that of the maximum curvature of the varient's coefficient (Paranaíba, Ferreira, & Morais, 2009), and, that of Hatheway (1961). According to Celanti, Schmildt, Alexandre, Cattaneo, and Schmildt (2016b), the use of Hatheway's methodology is interesting because it can satisfy the yearnings of the researcher who wishes to know the adequate plot size for their research accuracy, that includes the number of treatments and replications, the experimental outline used and the experiments precision. Among recent uses of Hatheway's methodology are mentioned those of Cargnelutti in determining the plot size in experiments with Pigeon pea and that of Schmildt et al (2018) with papaya tree genotypes.…”