Fig. 21: Stem diameter and quotient lengths to top and stem diameter

Fig. 21: Stem diameter and quotient lengths to top and stem diameter.

Numbers are representing the week number.

4.3 Yield

4.3.1 Total yield of fruits

The yield of tomatoes included all harvested red fruits during the growth period. The fruits were classified in 1. class (> 55 mm), 2. class (45-55 mm) and not marketable fruits (too little fruits (< 45 mm), fruits with blossom end rot, not well shaped fruits and green fruits at the end of the harvest period).

Cumulative total yield of tomatoes ranged between 22-25 kg/m2 (Fig. 22). In total was the cumulative total yield of tomatoes independent of the light treatment. However, the 1. class yield, the yield of too little fruits and green fruits was affected by the light treatment, while the 2. class yield was independent of the light treatment. There seem to be a small advantage of “HPS, Hybrid” compared to the other light treatments, even though this difference was not statistically different. The significantly higher yield of green fruits in “LED, Hybrid” and “HPS, Hybrid” compared to “LED, Hybrid+LED” is showing the potential of a possible higher total yield, in case the