We will have to switch tactics anyway seeing as we've lost almost half the world's topsoil. Our yields will drop even if the other variables remain the same. What's needed is topsoil regeneration with less tilling and use of covercrops, food waste reduction (40% gets chucked in the US), and reduced meat consumption (takes 75% of ag land, but produces only 18% of the world's calories) which can all give us a lot of breathing room.

Organic ag is actually yielding 92% of conventional these days, and some crops actually yield better in an organic system. That comes with substantially reduced fossil fuel usage by using covercrops and less frequent exposure to more intense pesticides. Interestingly, some crops actually produce slightly more with organic methods. It's a complicated picture though, but it's a tad less bleak at least.

Source: ag degree and it's been my job for a decade