Soil Respiration Calculator

Analyze soil CO2 flux measurements with temperature and moisture corrections to assess microbial activity and nutrient cycling.

CO2 respiration (mg CO2-C/g/day)

Soil temperature at sampling (°C)

Water-filled pore space (%)

Soil organic matter (%)

Tab to move between fields

Standardized respiration (mg CO2-C/g/day)

0.85

Activity score (0-100)57

Temperature factor0.71

Moisture factor1

Annual C mineralized (tons/ac)1,030.16

Est. N mineralized (lb N/ac/yr)171,694

Q CO21.41

RatingModerate

How to Use This Calculator

Enter the CO2 evolved in ppm over the measurement period from a Solvita jar test or field sensor.
Input the measurement duration in hours and the sample mass in grams.
Set the soil temperature at sampling to apply a temperature correction.
Review the Respiration Rate in mg CO2-C per kg per day and the Microbial Activity Rating.
Compare against the baseline for your region to evaluate whether microbial diversity is adequate.

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