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Mining increases Iron production in your cities. It is one of the four resource production technologies, the others being cultivation, lumbering, and hammering. Mining is the fourth technology in your college, which must be level 2 to research mining. Every upgrade increases Iron production rate by 10%

Upgrade RequirementsEdit

Lv. Prerequisites Iron Gold
1
2
3
4
5 College (Level 2) Iron Mine (Level 5) 13920 44735
6
7
8
9
10

BenefitsEdit

Every upgrade increases Iron production rate by 10%. It is effective in all of your cities that have a college of level 2 or above, regardless of Iron mine levels in that city.

Lv. Production Increase
1 10%
2 20%
3 30%
4 40%
5 50%
6
7
8
9
10