Covid-19 shows the international trade fair calendar in a completely different light.
Some fairs offer an online alternative (eg FRUIT ATTRACTION LiveConnect).

Other fairs have been postponed to (provisionally) 2021.
The PotatoEurope 2020 in France has been canceled, the next edition PotatoEurope 2021 will be in the Netherlands on the fields of Wageningen Plant Research in Lelystad.

Interpom in Kortrijk (Belgium) will be postponed for a year to November 2021.
The Agricultural Fair in the WTC Expo Leeuwarden will now be held in December 2021.
The IHF festival in Panningen was also canceled last year.
Sima in Paris has moved the edition from 2021 to November 2022.

The Agritechnica is currently still planned for November 2021.
The EIMA parts fair in Bologna will have a digital edition in November 2020, after which the event will take place live in February 2021.

In short, the 2021 trade fair calendar is full, and will probably be adjusted.