Farm
Produces Crops for construction, technology study, troops training & manufacturing, and expedition. (Crops Intake by troop's units consumes the most Crops.) Creating more Husbandry jobs boosts Crops production. The higher its level, the faster the jobs are created and the more jobs it can create, one at a time, per request.
Quarry
Produces Stone for construction, technology study, troops training & manufacturing, and expedition. (Upgrading the Temple and Wall, and manufacturing Rockfall and Onagers consumes the most Stone.) Creating more Gemology jobs boosts Stone production. The higher its level, the faster the jobs are created and the more jobs it can create, one at a time, per request.
Iron Mine
Produces Iron for construction, technology study, troops training & manufacturing, and expedition. (Troop's unit training and manufacturing consumes the most Iron.) Creating more Extractive jobs boosts Iron production. The higher its level, the faster the jobs are created and the more jobs it can create, one at a time, per request.
Sawmill
Produces Lumber for construction, technology study, troops training & manufacturing, and expedition. (Planting Barbican, training sagitanrii and manufaturing Bllistae consumes the most Lumber.) More Forestry job means faster Lumber production. Lumber is used in studying technologies and manufactring weapons. The higher its level, the faster the jobs are created and the more jobs it can create, one at a time, per request.