When running a turn, at which phase of the turn does bushel decay come off? Is it at start of turn before actions happen or is it after turn when food has been used?

start i guess (not that it should matter at what point decay happens).

It does should and does matter. If a person were to hold only enough to run 2 turns at 10-15 mill bushels per turn, the decay timing will affect where and when most bushels are lost as there is decay on that many bushels...now look at it with double to triple that usage per turn. Decay can hurt at that point

everything is calculated per turn when it ends.

whether you group turns together or not, doesnt matter. when the turn is done, the next turn takes into account how many bushels, cash, military, etc you have on hand.

if you produce 50 bushel per turn and you have 450 bushels you will end up with 499 bushels after your turn(0.1% decay rate rounded up from 0.5 bushels). If you had sold 1 bushel and taken the turn at 449 bushels you would end up with 499 bushels as well, but none lost to decay. Its calculated like LI says when the turn ends. Same goes for expenses, Cash decay etc.

Earthquakes, buildings built or captured happens first thing tho, so that will affect your production, pop growth, PCI etc.

Excellent! Thanks a bunch

Does decay show up in the displayed amount of food consumed each turn? Or is it a silent loss of bushels?

Silent loss