The thing about food production is that intensive fertilizer use allows double-cropping (two+ harvests per year in one field, like corn-soy). Brazil uses this a lot. So if you switch to lower input 'regenerative' processes, you'll only get one harvest per year most likely. This means Brazil might stop exporting food, and a lot of countries rely heavily on those exports.
There is a stat going around which states that !if everyone went vegetarian we could free up 80% of the farm land", yet with comments like double cropping per year which we see in the UK that 80% figure should actually be a lot lower especially if fallow time was factored in.
So if fallow time was factored in, in reality we have probably already run out of farm land to grow livestock and are at or just exceeding the available farmland to grow nutritional crops!
It makes the MIT population collapse model prediction for a global collapse in society by 2040 seem more believable when looking at the lack of farmland this planet has to grow decent nutritional crops.
A lot of that grain is fed to cattle, what is interesting is that here is a way to raise cattle with almost no inputs and certainly no feeding of grains.
I don't agree, because with that kind of thinking nobody has to ever stop. After all, convincing "everyone" is hard. Better to just start and do it over time, after folks see your solution works.
https://www.card.iastate.edu/ag_policy_review/article/?a=94
Becoming reliant on such intensive farming practices was a mistake, but here we are.