Spiral copper tube, connected to water bath, was buried at one side end of soil pillar, acting as the heat source for soil heat charging. The water bath could provide hot water of various temperatures ranging from 0 to 100oC, with an accuracy of ±0.1oC and kept constant temperature as controlled during a period of time. Thermocouples with an accuracy of ±0.1oC and VWC sensors with an accuracy of ±2%, connected to data logger, were installed for the testing of soil temperature and VWC.