I hope all those post those “people will starve in America” posts would read your post.
I agree in general, with your general premise that America will see decline in food productivity based on limitations and embargoes of fertilizers.
Nonetheless, world-wide the availability and especially, the cost of food will steadily increase thanks to the 'Globalist Economy' that our leaders have encouraged and embraced.
We are in competition with the rest of the world, especially in the time of food shortages.
Continuous supply chain disruption is something that we have never been faced with as a nation, except for the decade of the "Dust Bowl" era of the 30's.
How did the nation and technology respond ?
It gave us reliable and safer automotive transportation built upon cheap 'fossil fuels', thus establishing the reliable supply chain that we used to consider normal.
There is nothing 'normal' about this food security shortage, nor supply chain crisis, being brought on by governments and corporations.
It is purposely contrived, and aggravated by inflation.