Fig. 3. Change with thermal time from emergence in number of live tillers per plant (A) and number of potentially fertile tillers per plant (B) for plants grown at a density of two (circles), four (upward pointing triangles), eight (squares) and 16 (downward pointing triangles) plants m^–2. Vertical lines represent s.e.m. of three replications. Timing of phenological events indicated by dotted lines relates to the main culm.