.... The difficulties with Nelder plot design is their uncommon layout and complex parameterization (Parrott et al. 2012). This computer-aided tool for designing the Nelder plot can be very useful for the practical implementation of this experimental design.\r\n\r\nReferences\r\nNelder JA (1962) New kinds of systematic designs for spacing experiments. Biometrics 283–307\r\nParrott DL, Brinks JS, Lhotka JM (2012) Designing Nelder wheel plots for tree density experiments. New Forests 43:245–254.