“…The values of CV (X) as a function of X can be related by the methods of modified maximum curvature (MMC) (Meier & Lessman, 1971), linear response and plateau model (LRP) (Paranaíba et al, 2009) and quadratic response and plateau model (QRP) (Peixoto et al, 2011), and make it possible to determine the optimal plot size (Xo) and the coefficient of variation in the optimal plot size (CV Xo ). Comparative studies involving the MMC and LRP methods have been carried out with papaya (Brito et al, 2012), pineapple (Leonardo et al, 2014), cabbage (Guarçoni et al, 2017) and cassava (Sousa et al, 2018), the LRP e QRP methods with passion fruit (Peixoto et al, 2011) and MMC, LRP and QRP methods with radish (Silva et al, 2012), sweet potato (González et al, 2018), cactus pear (Guimarães et al, 2019), coffee (Moreira et al, 2016, Brioschi et al, 2020, millet + slender leaf rattlebox + showy rattlebox (Cargnelutti et al, 2021a) and buckwheat (Cargnelutti et al, 2021b), evidencing distinct results between the methods and the importance of using more than one method to determine the optimal plot size.…”