Not a farmer, but alfalfa can be grown many places. I watched a gabe brown video where he mentioned growing it for cattle grazing in North Dakota, which is basically a cold desert. Presumably US farmers in wetter climates like the upper midwest and southeast are capable of growing more profitable crops than cattle feed.
Just one example: If we switched to electric cars and eliminated the need for the midwest to grow corn for ethanol, then a tremendous amount of farmland would open up. So you're right to ask the macro question, it's just that the answer is complicated.
Just one example: If we switched to electric cars and eliminated the need for the midwest to grow corn for ethanol, then a tremendous amount of farmland would open up. So you're right to ask the macro question, it's just that the answer is complicated.