The point is that "a handful of enclosures" would only provide a few meals for a small group but would take six months to produce them. The group needs to eat f

The point is that "a handful of enclosures" would only provide a few meals for a small group but would take six months to produce them. The group needs to eat for the entire six months. Let's say each enclosure produces three-days worth of yams in six months. To feed one person for a year you need 100 enclosures, and you need to stagger their planting so you can harvest them continously. Each enclosure takes up about one square meter, so you need a line of them 100m long for each person in your group. You also need space to walk between them, so you need 3m for each two lines of enclosures. For a ten-person group, that's a 100m x 30m yam farm.