Figure legends
Fig. 1. Original (left) and adjusted (right; by removing effects of total mass) mean values (± SE) of plant root mass (grey) and shoot mass (white) at low, medium and high densities in infertile and fertile soil conditions at 30, 50 and 70 d of growth. Different letters denoted significant differences between density treatments (p < 0.05) within each soil condition and stage.
Fig. 2. Original (left) and adjusted (right; by removing effects of total mass) mean values (± SE) of root:shoot ratio for individuals at low (white), medium (grey) and high (black) densities under infertile and fertile soil conditions at 30, 50 and 70 d of growth. Different letters denoted significant differences between density treatments (p < 0.05) within each soil condition and stage.
Fig. 3. Original (left) and adjusted (right; by removing effects of total mass) mean values (± SE) of main root diameter (MRD), lateral root length (LRL) and number (LRN) at low (white), medium (gray) and high (black) densities under infertile and fertile soil conditions at 50 and 70 d of growth. Different letters denoted significant differences between density treatments (p < 0.05) within each soil condition and stage.