This family of 3 produces 6000 pounds of food a year on 1/10 of an acre that is organic, non-GMO and vegetarian: https://www.youtube.com/watch?v=NCmTJkZy0rM

They have enough surplus to sell to local restaurants to the tune of about 20,000$/year to supplement their income.

They use a lot of techniques handed down from antiquity, apparently.

Shh, don't tell the eugenicists masquerading as environmentalists and conservationists!