There was an error in the Nutrients and Soil Gas section of the orginal paper published. The values for soil carbon storage were stated incorrectly in this paragraph:

Soils represent a much larger reservoir of C and N than terrestrial plants (Matzner and Borken, 2008, and play major roles in global C and N cycles. Mineralization and subsequent leaching of soil N to groundwater and surface water has important consequences for water quality and aquatic ecology, and emission of greenhouse gases (CO2, CH4, and N2O) from soil has important effects on the global climate...

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