Food has two slightly different meanings in Imperialism.
The manufactured, tradeable product, which can be called "canned food", is adequate to feed a single citizen indefinitely, but its ingredients would feed two citizens when raw. It is the only manufactured product that can be obtained from a minor nation.
Raw foods are:
- Grain - from an upgradeable grain farm or (a small amount) from a bare plain
- Fruit - from an upgradeable orchard
- Meat - from either a water area (river or sea) or an upgradeable livestock ranch
Citizens need a balanced diet. For every four citizens, you need to transport 2 grain, 1 fruit, and 1 meat (the same ingredients that you combine to create two cans of processed food). Additional citizens above a multiple of 4 require grain, fruit, and another grain, successively.