"Soil" might be simpler since the other number refers to "materials".
Soil works for me
You settle in a place because of the "Food" you upgrade your "Food" to get more "Surplus Food"
Clean simple, and im confused ^^ I think those 2 are way too close to each other to be any good to be honest, might be me who is silly though.
If you really want some options, open a dictionary and find all the alternate words for food, grain, soil-fertility, Big tree's and whatever you think might be suitable for food.
Another word could be Irrigation: The amount of water in the area, because as we know, in medieval times, water = life, life = food.