Here are some other guides to pruning that I found useful as a newbie to fruit trees:
training and pruning home orchard.pdf (4.8 MB) A very basic guide (14 pages). I liked this one because it has pictures for all the terminology I needed to learn (leader, sucker, water sprout, scaffold) and a short overview of different systems (open center, central leader, etc.).
Training and Pruning Apple Trees from VA extension (951.9 KB)- 9 page overview of physiology, the different types of cuts, timing and 1st-4th year for a tree.
Pruning Peach Trees from VA extension (3.8 MB) - 11 page overview of physiology, the different types of cuts, timing and 1st-4th year for a tree.
Two articles from “Good Fruit Grower” which talk about both the 3:1 ratio size rule and the 1-2-3 rule (both are things mentioned above):
ten apple pear tree pruning rules.pdf (1.4 MB)
has a picture about the 3:1 size ratio rule and a bunch of other tips.
pruning apple and pear 1-2-3.pdf (1.3 MB) more details about the 1-2-3 rule
physiology of pruning.pdf (936.3 KB) science! No “how to” in this article- just plant physiology and the effects of pruning
For older neglected trees these were my two favorites:
SP307-K-Pruning Neglected Fruit Trees.pdf (438.0 KB)
Uploading: restoring an apple tree.pdf…