Donāt believe those that say they can grow good yields organically or any other so called sustainable, if you try the farm organically you go out of business very quickly, others give up after a few years, they canāt control weeds and pests.
Before fertilizers were used, to grow a crop of wheat you grew fodder crops to feed to livestock, then you had enough to grow a modest crop. Thatās around 2 tons of wheat every 4th year, with modern varieties and proper crop protection yields are double, in the rotation, rape or beans are grown adding to production
Pollinators. In the past DDT and other nasty chemicals were used, it didnt exterminate insect life, we still have all the pollinators we need. Those chemicals have long gone, even so they did no harm to the population in general, it was the farm workers that were affected, mostly because they did not wear protective clothing.
These are a few of the reasons why farmers are giving up even if they donāt want to, they are so widely demonized by, you have the best regulated, best quality food of any nation, yet itās not enough, you would rather import poorer quality.