Growing Trees in the Urban Jungle: Human Impact

By Alistair Johnston

Urban trees are often negatively impacted by those who benefit greatly from them, that is, humans. Poor planting practices, heavily compacted soils, utility pruning, improper maintenance, vandalism, mechanical injury from lawn equipment, or vehicle impact, are all sources of stress on tree health. Probably the most common and underappreciated human impact on trees is that of construction. Excavation associated with new buildings, pavements, and utility trenches often requires tree removal and/or results in severely damaged root systems.

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