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Article: Tree grates and guards - scrapping the heavy metal.
- Article from:
- Public Works
- Article date:
- October 1, 1993
- Author:
CopyrightCOPYRIGHT 1993 Hanley-Wood, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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FOR nearly 100 years botanists have understood that iron, as a micronutrient, is necessary for tree survival. Iron contributes to chlorophyll formation and, when not readily available in the soil, may cause leaf discoloration (chlorosis) and mortality. However, when it is formed into tree grates and tree trunk guards that are not properly maintained, iron can severely injure or kill valuable street trees. In Cincinnati, improperly maintained tree grates and guards have killed or injured over 300 trees. These trees could cost $90,000 to replace. This figure does not include the actual value of the trees based on "The Council of Landscape Appraisers Guide for Plant Appraisal," ...