When you make a new city it changes the yields to add some hammers/food/gold to 2/2/1. Are these values in the xml files somewhere? I've been trying to find it in terrain, since that's where all the yields are.
Edit: Found it on the civ5 forum! Appears to be in the yields folder, the MinCity values.
Edit: Found it on the civ5 forum! Appears to be in the yields folder, the MinCity values.