Let's go back to examples I have at hand (I'm in Portugal and live in a somewhat rural area).

50 to 60 sixty years back, there was a lot more cattle roaming the area, as this was wool country. Even then, through field rotation, the production/consumption of feed was close to zero (abundant rains, predictable sunny intervals) allowed for fields to produce using what was at hand for fertilizer.

Come the 90's, with the end of the wool industry, flocks reduce drastically but the production of feed crops and cereals remains the same, with marginal use of synthetic fertilizers.

Come the 2000's and the berry craze explodes, with large extensions of land converted into greenhouses or intensive growth fields, that divert and consume huge amounts of water and require tons of synthetic agrochemicals.

The problem with corn in the US we have it here with berry farms and common greenhouses, that actively refuse manures and composts, thus injecting amounts of nitrogen and phosphorous previously absent from the soil. I can widen the scope to include peach and plum orchards.

The only area we have identified has being satured with those elements is further south, again due to intensive tomato farming. And an area where cattle is also raised.

I'm not white washing my option: I want sustainable agricultural practices to become norm, not exception.