Fig. 5 – Total phenolic concentration (mg GAE/g DW) of raw control (C) and cooked green asparagus spears. Data are
pooled over two years. ANOVA was conducted on natural logarithm-transformed data; means (n = 4 to 10) have been
backtransformed for clarity. Means for individual treatments with the same letter are not significantly different according to
a Tukey’s test on transformed data (α = 0.05). The concentration of phenolic compounds in cooked spears, as a percentage
of that in raw spears, is presented above each bar.