Is a unit conversion required to divide EEA/SMB?

13 June 2019 1 1K Report

Soil extracellular enzyme activity (EEA) data is typically reported as umol g-1h-1

Soil microbial biomass (SMB) via the common chloroform fumigation extraction method can be reported as any weight per weight, but typically mg/kg.

Is a unit conversion required? What are the units of specific EEA?

Nicholas Cullen Dove

Hey Noelle, not sure if you have an answer already, but if you divide EEA by microbial biomass and multiply by 1000, you get units in umol activity/mg SMB/h or mmol activity/g SMB/h. Hope all is well! See below:

umol/g soil/h * kg soil /mg SMB * 1000 g soil/kg soil

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