hover over the icon of the resource you want and you will see a disable food subsitution button

Ahhh!!! ok thank you very much

Wow never knew that?!?

Oh another question please. Is it possible to set it so that only part of the crop not get turn into food?

Like my area, have lot's of wheat and some grape and honey. I would like to purely research on the multiplier for wheat rather than both wheat and grape/honey so I wouldn't need to waste my research time. So with large income of wheat is it possible to set a particular farm (or set a certain portion of wheat) to remain as wheat while the rest convert to food. This way I can get both food and alcohol from a single crop (even during winter where I can't get crop for alcohol).

引用自 Yamatoshi：

hover over the icon of the resource you want and you will see a disable food subsitution button

I might overlook something but can't find that button......there isn't a icon for wheat anywhere in the resource menu.

Yup, seems like wheat is default to be converted to food (maybe except if you got distiller) so you can never make ale in winter if it is make from wheat right now, since I can't find a way to store wheat as it is.
However if there is a way to put some wheat farms harvested product as wheat not food, then I can finally make go for ale maker. Right now ale maker doesn't seems to be of little use since you can't make ale during winter.

Except the food make from wheat is still considered as wheat (since in the food menu, it did say how much food is made from wheat) and can be use to make into ale in winter (please correct me, I haven't test this since I don't think it is working this way)