"It takes several acres of farm to feed one person." I think this may be a bit high, my math may be wrong. an acre of lentils for instance should yield about

"It takes several acres of farm to feed one person." I think this may be a bit high, my math may be wrong. an acre of lentils for instance should yield about 5-8 quintals (say 500-800kg) of lentils a year. I imagine if you really care about that one acre, you may get higher yields still. 800kg of lentils would be about 2600 kcal/day for a year. Rice would yield substantially more (but not everyone lives where rice paddies can thrive) Corn: 1 acre yields 170 bushes / 5000kg, about 50,000 kcal/day. Now, you need to eat other stuff as well to avoid malnutrition, but if you don't have meat, 1 acre seems to be more than enough per person. If you have to (zombie apocalypse, not because it would be convenient). Caveat: IANAF, cannot provide any agricultural advice.