Tab. 5: Proportion of marketable and unmarketable yield at different treatments

4.3.3 Outer quality of yield

Marketable yield was about 77-91 %. Marketable yield was lowest at the highest light intensity, because of a high amount of flawed and cracked fruits. Grafted tomatoes had less 2. class fruits compared to the other treatments (Tab. 5).

Tab. 5: Proportion of marketable and unmarketable yield at different treatments.

Marketable yieldTreatments

____________ Unmarketable yield ____________

1. class 2. class too little weight blossom end rot flawed cracked not well shaped

300 HPS, ungrafted 60 22 10 0 4 4 0 300 HPS, grafted 61 16 8 0 10 4 0 240 HPS, peat 61 28 9 0 1 0 0 240 HPS, pumice 65 25 8 0 1 0 0 240 HPS, scale 64 27 7 0 1 0 0 240 HPS, tending 62 28 7 0 2 0 0

4.3.4 Interior quality of yield

4.3.4.1 Sugar content

Sugar content of tomatoes was measured three times during the harvest period and varied between 3.7 and 4.5. At the beginning of the harvest period it was obvious that sugar content increased with grafting. However, these differences got smaller at the middle of the harvest period and disappeared at the end of the harvest period. It seems that sugar content was slightly higher with peat compared to pumice (Fig. 27).