Rejected.
One, you can't tell a peasant how much of his own food to eat - it's not like we had socialistic central food management, the granaries only take in surplus or cover deficits. So the only thing really under the control of the lord would be how much of the deficit he wants to cover with food from the granary.
Two, food supply is already figured into things like emmigration, region stats, etc. - so there is little in game-mechanics we would gain from adding this.
