Assessment of calcium status in soils of red spruce forests in the northeastern United States
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Biogeochemistry. 38: 19-39.
Long term changes in concentrations of available Ca in soils of red spruce forests have been documented, but remaining questions about the magnitude and regional extent of these changes have precluded an assessment of the current and future status of soil Ca. To address this problem, soil samples were collected in 1992-93 from 12 sites in New York, Vermont, New Hampshire, and Maine to provide additional data necessary to synthesize all available research results on soil Ca in red spruce forests. Sites were chosen to encompass the range of environmental conditions experienced by red spruce. Concentrations of exchangeable Ca ranged from 2.13 to 21.6 cmolc kg-1.
Lawrence, Gergory B.; David, Mark B.; Bailey, Scott W.; Shortle, Walter C. 1997. Assessment of calcium status in soils of red spruce forests in the northeastern United States. Biogeochemistry. 38: 19-39.