[maxerickson]

There's also the little pickle that manure from an industrial feedlot is considered an organic fertilizer.

(I'm not suggesting it's directly a problem, the issue is that it's real hard to figure out the nitrogen budget society ends up with if all synthetic fertilizers go away)

[hosh]

Have you looked at this? https://www.architectural-review.com/essays/cubas-urban-farm...

During the economic sanctions, Cuba was forced to stop using synethetic fertilizers, pesticides, and even tractors. They could not import enough to be able use those at scale. The people there had to adapt and work out how to live.