Not nearly as many. It looked big because it was tractors instead of people. And it was very well covered in all media. Don‘t try to spread false information here.
You're assuming "with a tractor" was the only way for farmers to show up to these protests. It was not; many of them showed up in plain cars.
> impact of those protests was quite high
Indeed, mostly because they were very disruptive. Despite prior assurances, they even hindered emergency services in performing their jobs.