Layering-plant propagation technique
by yamachem - uploaded on October 17, 2015, 1:10 am
This image was donated by Pearson Scott Foresman, an educational publisher, to Wikimedia Commons, and is thereby in the Public Domain.
you can see the source URL in the below comment.
This is a illustration of a layering as a plant propagation technique.
For more info about layering,see here:https://en.wikipedia.org/wiki/Layering