The mean photosynthetic rate was significantly higher for Spunta than for Sieglinde, on
average, 11.8 mmol versus 8.6 mmol CO2 m2 s1 (first planting) and 13.6 mmol versus
12.3 mmol CO2 m2 s1 (second planting). The higher photosynthetic rate of Spunta was
consistent across almost all measurement dates (Table 2 and Fig. 1). The difference
between treatments for both irrigation regime and cultivar reached significance in many
measurement dates following both planting dates, as shown in Fig. 1.