[Carry_Okie]

Your book discusses G_d's plan for preparedness, but does not mention the Sabbath year. That means you have missed totally the lynchpin of that system for how it was supposed to work in concrete logistical terms.

The key is the Sabbath for the Land.

[LomanBill]

Have you looked at Aquaponics?

The fish seem pretty happy without a Sabbath.