Category Archives: Care

Discussion: Does this tree need to be pruned?

October 26, 2009 – 11:19 am

This quercas alba (white oak, click on for larger view) has been pruned over the years by the utility company. It does not appear to have one dominant leader, and the homeowner is wondering if the many crowded branches growing vertically are weak attachments. The homeowner also wonders if by thinning the crown in particular, [...]

By gufc | Comments (5)

DISCUSSION: Tree Sampling for Chemical Analysis

September 29, 2009 – 11:47 am

At our recent program, “The Elements of Tree Health,” Dr. Kim Coder discussed the 20 essential elements. Often arborists in the field will sample the soil to better understand the situation, but what about sampling the tree? The sample is typically extracted from the crown, where growth is active, using either a leaf or small [...]

By gufc | Also posted in Biology | Comments (1)