An Ideal Plum Tree
The modern fruit tree has been taught to assume a low rounded form, bearing its treasures within easy reach of the picker. In the tree here shown, the results of the first thinning with the rubber hose are seen on the ground, and the second thinning is being performed by a boy who is able to reach most of the clusters without the aid of a stepladder.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 5 Chapter 6