Results
Effects of stage, soil, density, and interaction between stage and soil
were significant for most traits, and interactions between stage and
density, between soil and density were also significant for several
different traits (Table S1). Plant size (total mass) explained
significant variations in most traits. Across both stages, infertile vs.
fertile soil and high and medium vs. low density reduced total biomass
(P < 0.001; Fig. S1).