Urban Forestry
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Item Report to the 1999 Minnesota Legislature(1999) Minnesota Shade Tree Advisory CommitteeItem The Road to a Thoughtful Street Tree Master Plan: A practical guide to systemic planning and design(2008-08) Simons, Ken; Johnson, GaryMany if not most urban forestry successes and failures begin at the planning stage. The intent of this design manual is to replace as many of the subjective decisions made during street tree design and plant selection with objective criteria. The manual will assist communities and planners to not only select the best trees for their available planting sites, but to use specific principles of street tree design to most effectively create public green spaces, positively affect traffic patterns, and create healthy living spaces. The format of the design manual is one of prompting questions. This will not only help the user select the best plants for the area, but will pose sufficient questions to better ensure that issues of spacing, relative placement to travel corridors, and a wide variety of design elements will be satisfied. The tree species selection philosophy includes not only whether the tree is hardy enough but whether it can achieve the design function for the area. In theory, a well-placed tree in a well-designed landscape will require less maintenance and yield more rewards for the community.Item Stem Girdling Roots: The Underground Epidemic Killing our Trees(2021) Johnson, Gary; Fallon, DennisIn partnership with Xcel Energy and the USFS, the University of Minnesota Urban Forestry Outreach and Research lab produced this report which details the importance of diagnosing, preventing and correcting stem girdling roots. Stem girdling roots (SGRs) are dysfunctional root systems that grow against a tree's stem, compressing the sapwood and preventing vital nutrients from being delivered to and from the roots. This report details the negative consequences of SGRs for the health of the tree, safety of the community, as well as the economic and emotional losses of tree fatalities resulting from this preventable condition.Item Walking in the Footsteps of Giants: Selecting, Cloning, and Screening Minnesota-Native Elms for Dutch Elm Disease Resistance(2008-12-17) Giblin, ChadSince 2004, the UMN Urban Forestry Outreach Research (UFOR) Lab has performed research on thirty-two Minnesota-native elms for possible DED-resistance and identified seven new American and rock elm selections from the West Metro and eighteen new rock and red elm selections from Kandiyohi County for cloning, production, and inoculation research. Modified cloning and production practices enhance clonal root production and reduce transplant stress and failure. Additionally, UFOR researchers increased production of grafted trees to test rootstock-scion compatibility and implemented a replicated pruning study of juvenile clones to improve tree form and structure for long-term health and success. In 2009, these trees will be included in our field evaluations of inoculated clones to monitor their recovery. Future research on these specimens will include expanded cloning research, budding and grafting work, along with replicated inoculations of larger field stock in 2009.