Dwilight's got donut regions around it's cities where all the food is produced. You should see Nifelheim, and other cities on Dwilight, as strictly that what's inside the city's walls. The fields that you'd find in larger city-regions on other continents fall under their donut-townslands on Dwilight. Other cities, like Springdale, are coastal though, so they can still get food from fishing.
