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Fermat-mod (Fertility Matters)

This mod is named after the famous mathematician Pierre de Fermat but isn't connected with him at all. Just another abbreviation and wordplay.

The mod changes fertility system. It is aimed to make the game not easier but more various. In fact, the changes are few:

1) All city wall buildings give the fertility level (FL) and income penalties. The fertility level is not an integer number but a fraction one that is subordinate to the simple law of mathematical rounding. So, if you have 0,4 level, the real fertility level is 0. If you have 0,5 level, the real fertility level is 1. It means that you need to creat real irrigation system in a province.
The barbarian and civilized nations have different levels of irrigation technologies:
- Barbarians: in all main cities, the 4th level walls give 0,6 FL. In all minor cities, the 4th level walls give 0,2 FL.
- Civilized nations: in all main cities, the 3rd level walls give 0,4 FL and the 4th level walls give 1 FL. In all minor cities, the 3rd level walls give 0,3 FL and the 4th level walls give 0,5 FL.

2) All the bad seasons give -1 FL. Now the fertility can randomly change during the year.

3) The Garamantians have -3% penalty to all types of building income in order to balance their unfair fertility trait.

It's almost impossible to balance the Slavic Paganism temples because they can be build twice in a province and their fertilirty can be summed up. However, I recommend to combine this mod with my other work - the Roerich-mod. The Slavic temples are a bit more balanced there.