2.4.
Soil temperature and moisture
measurement
The temperature and moisture of soil were measured using a soil
temperature and moisture measuring probe (Em 50, Decagon Inc, USA)
(Fig.1).At the same time as the CO2 gas collector was
installed, the probe was placed a distance of 200, 140, 80, 20, 5 cm
underground and surface at the same time with the CO2gas collectors .