What is the best the best way to make Hash yield "vs" quantity

Hi everyone:
My friend grows outdoors with allot of success and He wants to find out what is the best way to use the leaves after Harvest! To make Hash from the leaves or to make An oil from them? And what is the best way of performing both procedures? And Yield :VS: Quantity? Sorry in advance for getting so detailed with my Question!
Thanx again, Sindy

https://www.rollitup.org/view.php?pg=faq&cmd=category&id=109
read these, 5 dif ways to make oil/hash

isn't yield and quantity the same thing LOL
You are thinking yield and QUALITY i believe

bubble hash. multiple grades in one batch. the higher quanity the lesser quality. lesser quanity of the higher quality.