CH4 and CO2 flux measurements.

stint: Sampling event. 1 (25 June to 1 July 2019), 2 (29 July to 5 August 2019), 3 (26–28 August 2019), 4 (15–16 June 2020), 5 (28–29 July 2020), 6 (24–25 August 2020), 7 (15 September 2020).

block: block identity.

plot: C (control), CH (charcoal, i.e., biochar), MX (soil mixing), MCH (biochar + soil mixing).

subplot: subplot identity.

ch4: flux of CH4 from the forest floor, in micromol per square meter per second.

co2: flux of CO2 from the forest floor, in micromol per square meter per second.

soilMC: average soil moisture content, in % dry weight.

soilT: soil temperature, in degree centigrades.

airT: air temperature inside the chamber, in degree centigrades.