Forest Sciences Commons^™

Sp663 Tree Planting Procedure For Small, Bare-Root Seedings, The University Of Tennessee Agricultural Extension Service

Forestry, Trees, and Timber

Tree seedlings receive foremost care while growing in a managed nursery: fertile soil; ample moisture; and weed, insect and disease control. Lifting seedlings out of this comfort zone shocks them. Consider: they are dislodged from the soil; their roots are often torn; they are handled several times; they are packaged, shipped, exposed to wind and heat, and placed in planting bags or machine buckets; their roots are unveiled to open air; and they are often replanted in harsh soil where they are left to high temperatures with the hope of adequate precipitation for sustenance through the first few growing seasons.

Sp657 Impacts Of Air Pollution On The Urban Forest, The University Of Tennessee Agricultural Extension Service

Forestry, Trees, and Timber

An average human breathes around 3,400 gallons of air each day. Included in each breath can be numerous noxious chemicals as well as suspended particles. Consequently, human lungs must cope with this pollution. It is well known that air pollution is hazardous to human health and of enormous concern today. However, the “lungs” of our urban areas, trees growing in and around our cities, must also contend with air pollution. Just as air pollution impacts humans, air pollution affects trees in a variety of ways.

Pollution has long been identified as harmful to trees. Historically, impacts of air pollution were …