City Trees

May/June 2013

City Trees is a premier publication focused on urban + community forestry. In each issue, you’ll learn how to best manage the trees in your community and more!

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-ADVERTISEMENT- Bartlett Tree Experts Research Biochar Biochar Fact Sheet Biochar is a new term for the ancient practice of converting agricultural waste into a stable, carbon-rich charcoal for soil enhancement ("terra preta" Dark Earth). The potential of biochar to reduce stress on urban plantings due to inferior soil quality has intrigued us at the Bartlett Tree Experts for many years. As such, the Bartlett Tree Research Laboratories has implemented numerous studies to evaluate biochar's effects on soil and Biochar "terra preta" plant health. Individually and in partnership with universities and other leading research institutions, we set out to verify claims that biochar: • • • • • Enhances soil fertility while reducing nutrient leaching and ground water contamination Increases soil microbial activity Increases water retention Stimulates plant growth Reduces disease and insect susceptibility Other potential environmental benefits include the use of existing agricultural and horticultural debris streams, carbon sequestration from this biomass for hundreds of years, reduced needs for fertilizer, and reducing greenhouse gases such as nitrous oxide and methane. Biochar test plot The potential benefits have led us to establish eight research projects to examine these claims using realworld and controlled scenarios. Comprehensive trials include urban street tree pits, simulated tree pits, greenhouse soil microcosms, greenhouse tree defense chemistry analysis, and disease resistant plots. The diversity of these experiments is necessary to fully evaluate biochar's potential as a soil and plant health enhancer. As more information is released in scientific publications, we intend to adjust our research accordingly. Biochar research is in its infancy. Bartlett has placed a great emphasis on fully understanding this exciting product. Woodchip Biochar About Bartlett Tree Experts Biochar application www.urban-forestry.com The F.A. Bartlett Tree Expert Company was founded in 1907 by Francis A. Bartlett and is the world's leading scientific tree and shrub care company. The organization's current chairman, Robert A. Bartlett Jr., represents the third generation of Bartlett family management. Bartlett has nearly 100 local offices serving 28 U.S. states, Canada, Ireland and Great Britain. Services include pruning, integrated pest and disease management, soil analysis and management, cabling and bracing, tree lightning protection systems and tree/stump removal. Its corporate offices are located in Stamford, CT. To find out more, visit the company's web site at www.bartlett.com or call 1-877-BARTLETT (227-8538). 17

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