I thought I'd tell you about the mana vai which the people of Rapa Nui
used, and still use, to grow crops. Within stone walls, the plants are
well protected from the wind; this conserves water (vai). This is very
helpful for the more tropical plants brought from Polynesia. Here our
guide Soro has ginger in one hand and a sugar cane in the other. Mark
and John were impressed, and there's more sugar cane behind John.
The other photo shows a much tidier mana vai, which we saw in the same
area while we were looking for places to sample soil.
