How tf do you think we've been managing to grow crops in the massive amounts we have? Pure wishful thinking?

The real answer is industrial chemical production processes and an increase in understanding of a lot of things. Traditional farming using dung is sooo last century; It's inefficient, significantly increases the risk of various pathogens and is hard to control leading to excess runoff and plant damage.

The reason more traditional methods are being resurrected is because those processes really benifit from scaling which all but gauranties monopolization leading to price gouging etc.