Going a realistic route would't be too bad: Your unit tends the farm for 5 minutes, building up a good healthy harvest, then harvests it for 1 minute for a large BURST of food into your treasury over that minute. Whatever way we end up doing it, I see this as very very low priority. lol Right now the Farms aren't ideal, but they work in an intuitive manner: Build field; harvest field; repeat. Very simple and gets the job done. Same way with the discussion on unit training elsewhere. The existing methods work intuitively, so let's focus on getting new features like trading, bartering, trample damage, running/charging, paper-rock-scissors, etc. into the game.