Agricultural industry is used to calculate the production of 
Grain, Cotton, Oil, Wine, Linen, Dates, and Sugar. Except for grain, which can be grown in all regions, each of these resources have a limited number of regions where it is possible to grow them.
Agricultural product is determined by all Building(s), and the final output modified by Terrain(s) of all Baronies in a County:
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Agricultural Buildings
(+)Additive values for all Buildings in a County:
Manor Houses:- Mansions: +10%
- Gardens & Vegetable Plantations: +15%
- Farm Estates: +20%
- Hundred-acre Fields: +25%
- Freeholds: +30%
- Windmills: +35%
- Consolidated Landholdings: +40%
- Grand Estates: +45%
- Cereal Fields:
- Logging Camps: +5%
- Resin Collectors: +8%
- Charcoal Burners: +12%
- Wood Pastures: +15%
- Tilled Fields: +19%
- Honey Pastures: +22%
- Forest Glassworks: +26%
- Sawmills: +29%
- Orchards:
- Fruit Orchards: +5%
- Berry Groves: +8%
- Fruit Tree Plantations: +12%
- Beekeepers: +15%
- Nut Tree Rows: +19%
- Mixed Gardens: +22%
- Grand Orchards: +26%
- Grafted Trees: +29%
- Hillside Fields:
- Hillside Fields: +3%
- Fell Pastures: +5%
- Root Cellars: +7%
- Vegetable Fields: +9%
- Lynchets: +11%
- Roads & Stairs: +13%
- Winter Granaries: +15%
- Apple Orchards: +17%
- Desert Agriculture:
- Small Plantations: +3%
- Trading Posts: +5%
- Weavers: +7%
- Wellsprings: +9%
- Caravanserais: +11%
- Date Groves: +13%
- Irrigation: +15%
- Large Plantations: +17%
Agricultural Terrain
(×)Multiplying terrain values for all Holdings in a County:
- Farmlands: 150%
- Floodplains: 135%
- Desert: 70%
- Desert Mountains: 40%
- Drylands: 100%
- Forest: 90% (slash-and-burn)
- Hills: 90%
- Jungle: 75%
- Mountains: 50%
- Oasis: 110%
- Plains: 100%
- Steppe: 100%
- Taiga: 20%
- Wetlands: 75%
