Figure 6

Hierarchically clustered heat map of the variables of concentration, accumulation, and stoichiometric ratios of C:N:P:Si in the leaf (a), in the stem (b), and in the root (c) associated with the physiological variables and the biomass of grain sorghum plants under different concentrations of silicon (Si). 0.0 to 1.0 indicates similarity between variables, where 1.0 is the greatest similarity and 0.0 the greatest dissimilarity.