The intensity of the laser beam is modulated using a modulation system with an on-off scheme using the Arduino Uno. The modulation frequency has been varied to get the maximum detection frequency. The photoacoustic cell used was a single resonator photoacoustic cell with type H. So...
Figure 7. (a) logarithm to base 10 of the soil carbon dioxide emission (EC-CO2) in the different treatments alongside the 95% confidence interval for the means according to the orthogonal contrasts based on the two-way ANOVA results; (b) soil organic carbon mass fraction (wSOC) at 0–20...