Low thinning

n. A thinning that removes trees of the lower crown classes to favor those in the upper crown classes (Helms 1998)

 

  • Discussion

 

Thinning from below is synonymous with the preferred term low thinning. Trees in the higher crown classes (dominant and codominant) are retained, while trees in the lower crown classes (intermediate and suppressed) are removed. If only merchantable-size trees are removed, many trees in the lower crown classes will be retained, resulting in a "thinning from the middle".