A new mechanism for calcium loss in forest-floor soils

  title={A new mechanism for calcium loss in forest-floor soils},
  author={Gregory Lawrence and Mark B. David and Walter C. Shortle},
CALCIUM is the fifth most abundant element in trees, and is an essential component for wood formation and the maintenance of cell walls. Depletion of Ca from the rooting zone can result in acidification of soil1 and surface water2 and possibly growth decline and dieback of red spruce3,4. During the past six decades, concentrations of root-available Ca (exchangeable and acid-extractable forms) in forest-floor soils have decreased in the northeastern United States5,6. Both net forest growth and… CONTINUE READING
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