Effect of coal combustion by-products on phosphorus runoff from a coastal plain soil

Keisha N. Johnson, Arthur L. Allen, Peter J.A. Kleinman, Fawzy M. Hashem, Andrew N. Sharpley, William L. Stout

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Coal combustion by-products can lower soil phosphorus (P) solubility, but few studies have assessed their effect on runoff P. A soil with elevated P content was amended with fluidized bed combustion ash, flue gas desulfurization gypsum, and anthracite refuse ash at rates of 0-40 g kg-1 soil, and runoff from small plots was monitored over 3 years. In the first year, by-products lowered dissolved P in runoff by up to 47% below the untreated control; however, effects did not persist into the remaining years of the study. Total P losses were not significantly affected by coal combustion by-products, likely because of elevated particulate P losses. Water-extractable P was up to 40% less in treated soils than in untreated soils across the 3 years. Results demonstrate that although coal combustion by-products readily lower P solubility in soils, their impact on P losses in runoff can be undermined by erosional processes.

Original languageEnglish (US)
Pages (from-to)778-789
Number of pages12
JournalCommunications in Soil Science and Plant Analysis
Issue number7
StatePublished - Jan 2011

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science
  • Soil Science


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