Coefficients for mixed effects model of log-transformed soil moisture. Date is number of days after 31 May 2009. The intercept refers to soil moisture level at the interior control plots at the beginning of the experiment. The final model was selected using the Akaike Information Criterion by stepwise removal of terms from the saturated model. Temporal autocorrelation of errors between successive measurements was 0.04. The error variance attributable to plot pairs was 0.004, and residual error variance was 0.03.