I think you're making an error there somewhere, possibly mixing calorie yields per year with human requirements per day. Divide that by 365 for a more realisti

I think you're making an error there somewhere, possibly mixing calorie yields per year with human requirements per day. Divide that by 365 for a more realistic estimate. About 60 people per acre if you can maintain the world record yield, or about 15 with the mean US yield.