Bibor
Doomsday Machine
Guys, you can't compare improved/uninproved bananas on a yield vs. yield level.
Improved Bananas provide 5 food with Plantation and Granary (6 with Fertilizer). While jungle cities won't starve, they won't grow fast either. Two or three Banana plantations will give the jungle city the proper growth boost it needs. Not only will you get more science from higher population, but also from the extra jungle tiles you can now work.
The same is true for those jungle gem, gold and coal mines, as jungle cities are chronically low on production.
My observations are for general jungle cities that you need as core, not those fancy gold/science generating peripheral ones.
Improved Bananas provide 5 food with Plantation and Granary (6 with Fertilizer). While jungle cities won't starve, they won't grow fast either. Two or three Banana plantations will give the jungle city the proper growth boost it needs. Not only will you get more science from higher population, but also from the extra jungle tiles you can now work.
The same is true for those jungle gem, gold and coal mines, as jungle cities are chronically low on production.
My observations are for general jungle cities that you need as core, not those fancy gold/science generating peripheral ones.