From AusBonsai Wiki
A Trunk chop refers to an aggressive pruning typically on the trunk of a bonsai, which reduces the height of the trunk significantly. Chopping is not usually performed with an ax, it's just a figure of speech used to suggest radical pruning.
|Types of Pruning|
|Pruning | Drastic pruning | Defoliation |Pinching | Trunk chop | Thinning | Trimming | Root pruning | Root trimming | Decandling|
|Tools for Pruning|
|Concave cutters | Shears | Thinning shears | Decandling shears | Leaf trimmers | Scythe | Root cutters | Branch cutters | Spherical cutters | Knob cutters|