The papercrete factory (tomorrow era) requires Hemp to be boosted. Papercrete is required to make Coral in a Coral breeder (Oceanic Future) This is why it gave you that boost from conquering an OF map sector. You probably also got the Guano boost. Thus allowing you to build the Coral breeder when you get to OF. So to be able to produce Coral, you need Papercrete, to produce Papercrete, you need the HEMP boost. It all makes sense to me my friend. However, any knowledgeable player would be using special buildings like a sleigh builder for all goods production at or before ME to avoid all this garbage.