Fig. 4 Starch and soluble sugar content (g m^-2 leaf area) of middle leaves of four soybean cultivars shaded during seed filling, 1994. The arrows indicate when the shade was installed. The bars represent ± standard error of the mean. Only representative bars are shown for starch and the bars for soluble sugars were frequently smaller than the symbol. Significant shade effects within a sample date are shown by * . NS = not significant