Urban Forestry
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Browsing Urban Forestry by Author "Johnson, Gary"
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Item A Guide to the Construction and Management of Community Gravel Beds(2021) Johnson, GaryThis thorough guide walks the reader through the planning, construction, implementation and management of gravel bed systems for bare root tree transplanting. Highlights include: relevant terminology for the use of gravel bed systems, decision making for the placement, cost, and building of gravel beds, a comprehensive account of species performance within the system, how to order appropriate tree stock, the installation and transplantation of bare root trees, and a guide for trouble shooting gravel bed maintenance issues.Item 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.