hydroponic farms

Add hydroponic farms as highest tier, that can be built on any type of terrain, require less water - due to reusing the same water - but all water must be supplied through pipe and not rain, can't use fertility from soil, take significant amount of fertilizer and brings more harvest. Upgrades can be multilayer farm, artificial lighting farm and robotic one (like on picture)

And I think, add alternativ production fish hydroponic, feed fish with animal food and make smaller amout of food.