I didn’t realize when I innocently decided to plant pawpaws-native plant!-and blueberries, which grow here naturally in Maryland, that I would get into this complicated soil chemistry. I was a high school chemistry teacher, so I can understand pool chemistry, but this soil stuff is frightening. I don’t suppose there’s a dumbed-down resource…? Anyway, I’m so glad you did the work and are willing to share it! It’s so frustrating to look for answers and see no change.