Greening Canada’s highways: expanding nursery and landscape market opportunities

Authors: McGrath, Darby

Organizations: Vineland Research and Innovation Centre

Start Date: 01/04/2013 | End Date: 31/03/2018

Based on earlier research results which pointed to the negative impact of compacted urban soils, this research project was designed to improve tree survivability in highway and urban environments. After five years of research and four years of direct testing, deep ripping and the addition of organic matter has been proven as a method of remediation of urban soils to ensure the long-term survival of trees. Based on several sites sampled throughout Ontario and Alberta, a soil remediation calculator was developed that estimates the amount of organic amendment required to bring the soil bulk density below root limiting thresholds for trees

Keywords: compacted urban soils, deep ripping, soil remediation, soil bulk density, remediation calculator