Once Maroccidens is wholly settled, there will be an overabundance of food.
Terran will be self-sufficient when fully developed. Barca and Aurvandil will run major surpluses. D'Hara will continue, now and forevermore, to run deficits. I suspect, however, that D'Hara's deficits will be smaller than Barca and Aurvandils' surpluses. Fully settled, I expect Dwilight would have huge, consistent, food surpluses in most areas.