Urban Forestry

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https://hdl.handle.net/11299/223269

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Browsing Urban Forestry by Author "Hanson, Dave"

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    Buried Root Systems: Their association with stem encircling and girdling roots, and relationship with tree condition
    (2004-09-05) Hanson, Dave
    This study examines buried root systems among street trees surveyed in three Minnesotan cities. Buried root systems can cause tree roots to encircle, girdle a tree stem, cutting off vital nutrients to the tree canopy and causing the tree to decline, die. Results of this study will help arborists and urban foresters better understand the association between the depth of soil over a tree’s first lateral root and frequency of these encircling, girdling root systems.
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    Research Summary on a Long-Term Planting Depth Study
    (2007-09-05) Hanson, Dave
    The focus of this study is to determine how quickly stem encircling (SERs) or stem girdling roots (SGRs) occur, and to determine what (if any) relationships exist between planting depth and suckering, SERs, SGRs, or growth rates. While there are some interesting trends, few solid conclusions can be drawn from the data collected thus far.
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    Research Summary on Pot-In-Pot Production and Planting Depth
    (2006-04-03) Hanson, Dave
    This focus of this research study investigates the nursery practice of placing trees deeply in containers to prevent wind-throw and excessive lean. After four months of observation, tree lean, caliper and root volume were analyzed, and results showed no association between planting depth and occurrence of windthrow. A lower proportion of trees required staking when planted at greater depth of soil. Species-specific associations between planting depth and root volume and caliper were observed, and these findings can help inform standard nursery practices.