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Title: Lead forms in urban turfgrass and forest soils as related to organic matter content and pH
Author: Yesilonis, Ian D.; James, Bruce R.; Pouyat, Richard V.; Momen, Bahram
Source: Environmental Monitoring and Assessment. 146: 1-17.
Description: Soil pH may influence speciation and extractability of Pb, depending on type of vegetation in urban soil environments. We investigated the relationship between soil pH and Pb extractability at forest and turf grass sites in Baltimore, Maryland. Our two hypotheses were: (1) due to lower pH values in forest soils, more Pb will be in exchangeable forms in forested than in turfgrass soils and (2) due to the greater lability of exchangeable Pb in equilibrium with soil solution in forest soils, concentrations of this form will increase with depth more so than in the turfgrass soils, as related to organic matter content and pH. Soil samples were collected from three forested and three turfgrass sites to depths of 20 cm. Lead forms were determined using a sequential extraction technique.
Keywords: fractionation, metals, lead, sequential extraction, urban soils
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Pouyat, Richard V.; Yesilonis, Ian D.; Golubiewski, Nancy E. 2009. A comparison of soil organic carbon stocks between residential turf grass and native soil. Urban Ecosystems. 12: 45-62.
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