I'm aware, that by the time of the treaty of Brest-Litovsk, the German Empire was practically starving due to a lack of food (caused mostly due to the British naval blockade). However even back then I thought that Ukraine and Ruthenia were major grain producers, and I would have thought that when the Germans signed the treaty, gaining all of this land, the seizure of such fertile lands would have been a massive boon to the starving German people? Yet I can't find any details on if the treaty had any impact or not.

Is it just that Ukraine and (modern_) Belarus weren't as big grain exporters as they are nowadays? Or was the overall impact on Germany just not enough to warrant a mention or any information on the subject. (As I'm still fairly sure that even with a stable food supply Germany and Austria-Hungary would have lost)