So, John Jevons says we could feed ourselves on 4,000 square feet per person. Multiply that times Kauai's 85,000 residents and visitors, and you get 7,800 acres.
So far so good, since Kauai's 356,000 acres includes 92,000 acres of cropland, roughly 20,000 of which is (now) fallow cane land.
Still, if we had to rely on the typical American land use for our diet (up to 30,000 sf per capita), that would sum to 58,650 acres. That's 64% of our Kauai cropland we'd need to grow our own food. Wouldn't it be better to grow our needs on 9% of the cropland, instead?
Oh, and, if we used the American average for all crops, including those grown for export, we'd need 323,000 acres of cropland, or virtually our entire island.
In other words, we've got just over an acre per person available to grow all our needs...including biocrops for energy
Seems like innovative methods to actually grow our food on less than one-tenth of an acre (as Jevons promises) might be a high priority...if only 'cause that leaves a lot of land for other stuff.
BTW, note that our State owns much of Kauai's land, including these prime ag lands:
- 10,000 acres in Kekaha
- 2,000 acres in Hanapepe
- 6,000 acres in Wailua
- 2,000 acres in Kamalomaloo
- 1,000 acres in Hanalei
So, let's see...that's over 21,000 acres of more or less 'prime' ag land we already own. That's more than 20% of the total cropland available.
Shouldn't be much problem with the 'land cost' portion of our local food production strategy, right?