Good to know. I know we have several different types of pecan trees and they produce different types of pecans. Some more than others, some smaller and meatier, some larger with thin shells, etc. The trees my grandfather planted have been there close to 100 years now. My father planted some at their house and those are around 40 years old. I bought a couple trees for my dad years ago and they came from Stark Brothers Nurseries online and so many varieties we weren't sure what to get. Some produce better, good to know this can sort of be changed around using grafts.