With fields being damaged when walked across, it might be useful to see how much food they will yield. At the moment, potentially you could harvest one with 1 food left, so would be better off going to the forest. I say this seeing that a field in one of my games (not my field) lost 3 food this turn and still can't be harvested. Maybe there should be a guaranteed minimum yield, or start with a higher base value (though that would then change game tactics as it would be easier to stockpile early).
An indicator for how much food is left on a field would be useful though
