As anybody who has spent time working on a farm can attest, whole corn and soybean are some of the primary cattle feed. The majority of all soybean grown in North America is used as cattle feed and corn is a large market segment. The reality is that meat production uses far more land than plant-based alternatives, even adjusted for caloric output. You don’t need to believe me as this is a well researched topic and you can find reputable sources for yourself.