Fig. 4

Boxplot of shoot dry mass (g) of barley assessed in the six tested protocols. Above ground biomass was harvested and oven dried at 70 °C for 48 h. A-F protocols 1–6. Whiskers indicate minimum and maximum values in the first and fourth quartile. The box boundaries indicate the upper (25th percentile) and the lower (75th percentile) quartiles. The bold line in the box represents the median