I have an experiment testing efficiency of different concentrations of a herbicide mixed with different concentrations of surfactants (ex., 0.5 g/l herbicide + 0.0125 g/l surfactant, 0.5 g/l herbicide + 0.025 g/l surfactant, 0.5 g/l herbicide + 0.05 g/l surfactant, 0.5 g/l herbicide + 0.1 g/l surfactant; 1 g/l herbicide + 0.0125 g/l surfactant, 1 g/l herbicide + 0.025 g/l surfactant, 1 g/l herbicide + 0.05 g/l surfactant, 1 g/l herbicide + 0.1 g/l surfactant) on the growth of plants. Can the statistics in this experiment be calculated using a two-way ANOVA?
In cases involving continuous factors, optimizing these experiments using designs such as the Doehlert experimental design (for example) can lead to more robust analysis and enable the extraction of responses across the entire experimental domain."
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