So the idea in beta4 is that the conquest of food hexes will actually produce more initial food than it does now (1:1), to represent the fact the existing food can be looted but that once the hex is "exhausted" that food hex is out of the war.
and
How long were planning on allowing a conquered food resource to contribute to the conquering nation?
There's a 30% chance each turn after food is harvested from the hex that the hex will become exhausted.
Having thought about it some more, IMO this system is wrong from a historical perspective.
Under this when (if) Russia surrenders Germany gets a massive influx of food straight away that will then taper off as time passes.
This is exactly the opposite of what actually happened......they got almost no food straight away and there wasn't enough time for the food from the Ukraine to get to Germany in any significant amount before the armistice.
So I suggest reversing it - captured food produces NOTHING initially....but has a 30% chance of coming "online" each turn - but would then only produce at 1/3rd or perhaps 1/2 IMO.