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Gary Johnson
Extension Professor

Urban and community forestry

Office: 101e Green Hall
Lab: 130 Green Hall
Phone: (612) 625-3765
Fax: (612) 625-5212
E-mail: johns054@umn.edu

Forest Resources Extension

Areas of Expertise

· Urban Forest Health:
      Stress Disorders: Deicing Salt Damage; Urbanized Soils.
      Diseases of Trees and Shrubs.
· Risk Assessment and Management.
· Tree Preservation During Construction Activities.
· Dysfunctional Root Systems, including Stem Girdling Roots.
· Nursery Tree Production.

Areas of Outreach and Research

· Outreach:
     Chair, Minnesota Shade Tree Short Course.
     Coordinator, Minnesota Tree Care Advisor program.
     Coordinator, Minnesota Tree Inspector Core Course Certification and
          Recertification Workshops.
· Research:
     Tree Failure Due to Loading Events.
     Stem Girdling Root Syndrome: Causes, Effects, Prevention, Treatment.
     Effects of Construction Activities on Tree and Urban Forest Health: Early
          Detection, Prevention and Treatment.
     Production of Nursery Grown Trees and Shrubs: Gravel Bed Systems,
          Pot-in-Pot Production, Producing Quality Root Systems.
     Effects of Deep Planting on the Health and Condition of Trees.

Courses Taught

• ESPM 4041  Problem Solving and Planning in Natural Resources, 4 cr, fall only.

• FR 3501 Arboriculture, 3 cr, spring only.

• FR 4501/5501 Urban Forest Management: Managing Greenspaces for People, 3 cr, spring only.

Selected Publications

• Tough trees and shrubs for tough sites. 2001. Johnson, G.R., Zins, M., and Shippee, M. University of Minnesota Extension Service. FO-7502-S. http://www.extension.umn.edu/distribution/naturalresources//DD7502.html
• A practitioner's guide to stem girdling roots of trees: impacts on trees, symptomology, and prevention. 2000.
  Johnson, Gary and R. J. Hauer. University of Minnesota, Extension Service. BU-7501-S. http://www.extension.umn.edu/distribution/naturalresources//DD7501.html
• Protecting trees from construction damage: a homeowner's guide. 1999. Johnson, Gary. University of Minnesota Extension Service. FO-6135-S. http://www.extension.umn.edu/distribution/housingandclothing/DK6135.html
• Storm damage to landscape trees: prediction, prevention, treatment. 1999. Johnson, Gary and Ben Johnson. University of Minnesota Extension Service. FO-7415-S. http://www.extension.umn.edu/distribution/naturalresources/DD7415.html
• Minimizing de-icing salt injury to trees. 1995. Johnson, Gary and Ed Sucoff. University of Minnesota, Minnesota Extension Service, FO-1413. http://www.extension.umn.edu/distribution/naturalresources/DD1413.html
• Recommended trees for: Southeast Minnesota. An ecosystem approach. 1996. Johnson, Gary and Katie Himanga.
  University of Minnesota, Minnesota Extension Service, FO-6574-S.
  http://www.extension.umn.edu/distribution/naturalresources/DD6574.html
• Planting trees and shrubs for long-term health. 2002. Hargrave, R., Gary Johnson, and Mike Zins. University of Minnesota Extension Service. MI-07681-S. http://www.extension.umn.edu/distribution/horticulture/DG7681.html
• Stress on the streets: assaulting and saving urban trees. 2003. Johnson, Gary. Tree Care Industry 14(3):8-14.
• Tree Care Advisor: A voluntary stewardship program. 1995. Johnson, Gary. Journal of Arboriculture 21(1):25-32.
• Nature and children: Their perspectives - our future. 1996. Johnson, G.R.. In: Proceedings of the 1995 Society of American Foresters Convention, Portland, Maine, Oct. 28-Nov. 1, 1995. Bethesda, MD, SAF. pp.169-172.