Penn State Extension

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A Guide to Preserving Trees in Development Projects
A Guide to Preserving Trees in Development Projects - Articles Articles

A Guide to Preserving Trees in Development Projects

William Elmendorf, Ph.D., Henry Gerhold, Ph.D., Larry Kuhns

This publication explains tree health and environmental considerations and details how to preserve trees. More
Are Roadside Springs Safe?
Are Roadside Springs Safe? - Videos Videos

Are Roadside Springs Safe?

Bryan Swistock, Susan Boser, Mark Madden, James Andrew Clark, Diane Oleson, M.S., Amy Galford, Gary William Micsky

Many people drink water from roadside springs in Pennsylvania. But recent research suggests that you should use caution when consuming spring water. More
Landscape Tree Factsheets
Landscape Tree Factsheets - Guides and Publications Guides and Publications

Landscape Tree Factsheets

Henry Gerhold, Ph.D.

456

$30.00
Select trees for planting in your towns and cities. More
A small roadside spring located along a state forest road in northcentral Pennsylvania.
Roadside Springs - Articles Articles

Roadside Springs

Bryan Swistock, Susan Boser, Mark Madden, Diane Oleson, M.S., Amy Galford, Gary William Micsky, James Andrew Clark

This article discusses a research study on the water quality and use of numerous roadside springs across Pennsylvania. More
Pruning Landscape Trees
Pruning Landscape Trees - Articles Articles

Pruning Landscape Trees

William Elmendorf, Ph.D., Henry Gerhold, Ph.D.

Proper pruning of landscape trees improves their structural strength, maintains their health, enhances their beauty, and increases their value. More
Topping trees results in large areas of decay and fast-growing, weak, and unattractive watersprouts.
Don't Top Trees - Articles Articles

Don't Top Trees

William Elmendorf, Ph.D., Henry Gerhold, Ph.D.

This article explains the dangers of tree topping and what measures should be taken to prevent them. More