Not sure why the author doesn't mention the known (and gaining traction) solution: rotational grazing. It's a rather simple carbon-negative solution. You have a bunch of land, you divide it into paddocks, you rotate ruminants to fresh grass. The previous paddocks regenerate and bind carbon. Repeat. A large plot of land is able to bind carbon for decades. https://duckduckgo.com/?q=rotational+grazing+carbon+negative
I sincerely doubt this fully compensated for methane emissions.
https://www.agweb.com/news/livestock/beef/feeding-cows-seawe...