Feed Conversion Ratio (FCR) for cattle is about 10, pig 3, sheep 5, and chicken 2. That means we could feed about 10 times more people per hectacre on grains than using that grain as feed for beef. Ruminants are important for nutrient cycling and other ecosystem services, but far from efficient as a food source for humans. They are best utilized on marginal land where agriculture isn&#x27;t ideal.<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Feed_conversion_ratio" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Feed_conversion_ratio</a>