Maximum resource yield question

[Gilithos]

My question is regarding how to get maximum resource yield.

I'll ask with an example. I am crushing Granum. I know that I need max skills in Granum Lore, Basic Ore Extraction, Ore Extraction Appliances, Comminutors and Crusher Operation. My question is this, do I ALSO need to have max skill in Blood Ore, Amaranthum and Flakstone to get the maximum yield here?

Sorry if this was asked elsewhere, I couldn't find it.

 

[bbihah]

You need the lore on the things you are getting out of extracting as well to get the most out of it.

 

[Gilithos]

Thank you very much!