You clearly know very little about agriculture. Beef cattle actually graze many hundreds of thousands of acres of land that could not realistically be converted to legume production.
Your comment would be fine without the first sentence, and even better if you had added one or two sentences more to explain why it could not realistically be converted to legume production.
https://hn.algolia.com/?dateRange=all&page=0&prefix=true&sor...
Edit: having looked at your comment history, it's painfully clear that you're using HN primarily for ideological battle. That's the line at which we ban accounts*, regardless of what they're battling for, so I've banned this account. If you don't want to be banned, you're welcome to email hn@ycombinator.com and give us reason to believe that you'll follow the rules in the future. They're here: https://news.ycombinator.com/newsguidelines.html.
* https://hn.algolia.com/?sort=byDate&dateRange=all&type=comme...
Also, what's with the insulting tone?
Most of our meat in the US comes from factory farms.
> 70.4 percent of cows, 98.3 percent of pigs, 99.8 percent of turkeys, 98.2 percent of egg-laying hens, and over 99.9 percent of chickens raised for meat come from factory farms.
https://www.livekindly.co/99-animal-products-factory-farms/
This said, the range that beef cattle occasionally graze could be reclaimed, but not necessarily for legume production.
Legumes: https://gilmour.com/planting-zones-hardiness-map
Beef: https://www.sciencedirect.com/topics/agricultural-and-biolog...
There is overlap, but no where close to 100%.