The system operations prevent an excessive CO2 pressure build
up within the chamber by operating between maximum and minimum
CO2 concentrations which were equal to that measured on the
soil surface
±10 ppm CO2. At the same time as the CO2 efflux measurement,
soil temperature (from 0 to 15 cm depth) was measured
a few centimetres away using the 6000-09TC Li-COR temperature
probe.