Agrocultural production in this era would be relatively linearly related to rural population. Each rural peasant would produce a tiny amount more food than he needs to sustain himself.

A place like Violette would be roughly in equilibrium. Anywhere less urbanized would produce an excess for export, anywhere more urbanized would need to import a portion of their food, and places like Starborn City or the Vialiphate would be completely dependent on food imports for nearly all of their agricultural needs.