highly significantP = 0.0003
The increases in temperature were highly significant (repeated measures anova controlling for plot: F 1,6 = 59.03, P = 0.0003) but did not affect soil moisture (treatment: F 1,4 = 0.08, P = 0.7880; treatment × time: F 37,148 = 0.74, P = 0.8557) in the period when the heaters were turned on.