Decoding soil pCO2 and pO2 to unravel the abiotic (mineral/climate/hillslope/soil physicochemical property) and biotic controls on soil carbon cycling. See work performed at the Susquehanna Shale Hills Critical Zone Observatory. We will be expanding this work to the Kessler Field Station in Oklahoma!

Tracking the influence of acidity produced during nitrification of fertilizers on soil inorganic carbon flux partitioning in calcareous soils. See work from the Cole Farm watershed of the Susquehanna Shale Hills Critical Zone Observatory. We plan to perform both laboratory and field-scale experiments to target the controlling mechanisms of CO2 flux partitioning in agricultural, calcareous watersheds.

Using fixed potential electrodes (see graphite electrode below to left) to quantitatively track metal redox reactions and redox transition zones in upland soils. See Dr. Hodges (below to right) installing electrodes at the Susquehanna Shale Hills Critical Zone Observatory.


Characterizing the role of poorly-crystalline metal oxides (Fe, Mn, Al) in controlling soil organic carbon retention across pedogenic gradients (precipitation and vegetation gradient in Argentina, lithologic gradient at the Calhoun and Susquehanna Shale Hills Critical Zone Observatories). To be expanded across precipitation gradient in Oklahoma!

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