The Editor regrets that the wrong group of graphs was selected for use in Figure 1 on page 304 of the October Journal of Arboriculture in the paper by Geoffrey P. Arron. The graphs for EL-500 and PP-333 also should have been included. They are represented below. Please make a note of this correction in your copy of the Journal.
- © 1985, International Society of Arboriculture. All rights reserved.
