Build and upgrade your Farm, Stone Mason, and Sawmill to increase both your capacity and production rate for Food, Stone and Wood.
 
Once a producer is full it will stop producing, tap on the icon above it to collect the resources and resume production.
 
Plots can be built to plant crops and/or raise cattle and chickens. These can be harvested when ready for additional Food. Plots can also be looted if they are ready to harvest and you defeat a city in combat.