How to deal with lack of a certain resource?
When you have a ressource's surplus, you can sell it automatically pressing ctrl + shift.
In my case, my farms need water to produce food. I must buy water manually each time it is needed.
Is there a way to automatically buy ressources you're lacking?
You just have to click on the bouton below and the factory will auto-buy the ressource from the market.
However, these ressources won't be purchased if the factory doesn't make profit. It will shutdown instead. In addition to this question, you can force the purchase, if needed, with the first button of the screenshot.