From the same wikipedia page, a bit above what you linked, there's also this chart: https://en.wikipedia.org/wiki/File:Meat_Atlas_2014_subsidies... showing how many billions are spent on animal product subsidies.
Unfortunately I had no luck finding the actual OECD reports, though (aside from the " Agricultural Policy Monitoring and Evaluation 2019" report, but that seems to just compare each country to the global average, rather than talking about different types of subsidies)
I'm all for removing subsidies to monoculture agriculture.
Yeah, I searched around a bit (even outside of the US) and I'm having difficulty finding any proper data to back up or refute it. That's a pity, would have been nice to know either way. The best I found was data on subsidies given to individual farmers in my country (I'm not in the US), but unless I scrape the site and aggregate and categorise the data, its not really useful (and doing that is too much work for me).
> I'm all for removing subsidies to monoculture agriculture.
Absolutely. I don't even mind animal products receiving subsidies, I'm not vegetarian and certainly not vegan, but I do hope that non-animal products get a large chunk of the subsidy pie, personally.