Monoculture is definitely a risk, one exacerbated by megacorps and overly corporatized industry - but if you look at the history of ag departments they have introduced multiple variants and variations across crops and animals time and time again. They also work with smaller growers in communities in many ways - natural pest controls consultations for example

Just a fun fact. We're pretty close to the anniversary of the dust bowl. . . Which was driven by farming practices to raise monoculture crops.

No purpose to this other than this is a very long term problem that, I believe, will bite us in the ass at some point.