Instruct your people to plant orchards, cultivate crops and build cattle farms, it will constantly refill your stocks of food, which is vital for the survival of the settlement. Fruit trees in orchards grow for many years; you need to take good care of them to ensure that you gather a rich crop every year without heavy expenditures.
Unlike orchards, fields need to be seeded every year. They give wheat, corn and other crops every autumn. Don’t forget to harvest on time as cereals are a good supplement to the diet of your inhabitants.
Food has a nutritional value measured in kcal. The higher that value the longer will your people be fed.