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Notes: Vertical Root Distribution of American Basswood in Sanitary Landfill Soil

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Root systems of twelve 7-year-old American basswood (Tilia americana L.) trees growing in cover soil placed over a completed sanitary refuse landfill were excavated and mapped. Elevated levels of soil CO2 and CH4 emanating from decomposing refuse, in conjunction with low O2 concentrations, appear to be partially responsible for causing a decrease in total root length and a reduction in the depth of root penetration. In areas of high landfill gas concentrations 20 cm below the soil surface, basswood roots ceased growing; however, at low gas concentrations, the roots grew toward the soil surface, away from the source of CO2 and CH4. Concentrations of soil CO2 and O2 were highly correlated with total root length. Forest Sci. 27:725-729.

Keywords: Tilia americana; chi-square analysis; root-depth distribution class

Document Type: Miscellaneous

Affiliations: Professor, Department of Plant Pathology, and Cooperative Extension Specialist, New Jersey Agricultural Experiment Station, Rutgers University, New Brunswick, New Jersey 08903

Publication date: December 1, 1981

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