What does 10 kilograms of food represent? Take the Sawmill farm as an example, a piece of farmland growing the most cost-effective pumpkins can produce an average of 10 kilograms of pumpkins per day. Two plots of land would yield 20 kilograms of pumpkins daily, which is enough for ten people to eat for one day.
However, eating only pumpkins definitely won't suffice, if planting rice and wheat which are next in terms of cost-effectiveness, the average daily yield would be 6 kilograms of rice or flour. Anything lower would be various vegetables. It is said that the cost-effectiveness of potatoes and sweet potatoes is not inferior to rice and wheat, but the related seeds have not been obtained yet, so the specifics are unclear.
The good news is, the research institute has unlocked the fourth technology, increasing the yield of farmland by 5%. The discussion on whether to upgrade to the fourth technology or to continue advancing up the technology tree is currently heated.