Vegetable Carbon
Vegetable Carbon is an Industrial Age African Granary upgrade for Villager gathering from Food Fields. It raises the same source-specific work rate by 20%, building on the earlier Swing Plow investment.

Research profile
- Age & building
- Industrial Age · Granary
- Prerequisite
- Swing Plow (after Subsistence Farming)
- Cost & time
- 800 Wood · 30 seconds
Research effect
The technology requires Swing Plow, costs 800 Wood and takes 30 seconds to research. Its bonus applies to Villagers gathering Food from Fields, not to Wood or Coin Fields, Hunts, Mills, Rice Paddies or Haciendas. The full chain also includes Subsistence Farming before Swing Plow.
Research condition
Africans · Industrial Age · Granary · requires Swing Plow · 800 Wood · 30 seconds · +20% Villager Food gathering from Fields.
Cost and prerequisites
Estimate how long Villagers will remain on Food Fields before paying 800 Wood. The upgrade can repay its cost in a sustained Field economy, but has little value if workers are moving to Hunts or other Food sources. Include the earlier prerequisites when deciding whether the complete chain fits the match.