Figure 3. Biplots of the first two principal components
summarizing variation in a) soil properties and b) plant root
morphological attributes, for RS (green), OUS (blue), and DUS (orange)
environments. Soil PCA (PCsoil) (a) used recorded
information at site level (nsite = 60), while root PCA
(PCroot) (b) depicted included information at plant
level (nplant= 201).