An acre of land used to raise cattle yields 20 lbs of edible protein. That same acre could grow 356 lbs of soybeans. It takes 300 gallons of water per day to produce food for... more An acre of land used to raise cattle yields 20 lbs of edible protein. That same acre could grow 356 lbs of soybeans. It takes 300 gallons of water per day to produce food for a Vegan and 4000 gallons of water a day to produce food for a meateater. Kinda staggering isn't it?