*Appendix E.8. Potato*

We took years 2015 and 2017 from Figure 3 [15]. To be conservative, we assumed an average shading level of 38%, the mean of 26% and 50%, two of the shading intensities shown in Figure 3 [15]. Reading in the graph the pertinent values and calculating, a shading level of 38% delivered an average tuber yield variation of 23.4%, which we rounded to 23%. We decided to apply no further uncertainty factor due to the following: although, with respect to the availability of the solar resource, our latitude of Seville is more advantageous than the latitude of Germany [15], this is cancelled-out by the fact that our early potato crop season is shifted towards winter.

## *Appendix E.9. Tomato*

The data compiled in Table 1 [32] indicate no tomato yield variation between fullsunlight and shade (60% light). To be conservative, we considered a -5% in yield, to account for the fact that Hernández et al.'s experiment [32], although at the same latitude than ours, was conducted inside a greenhouse.

### **References**

