Fig. 6 Variation in DWR (difference between water retention values before and after wetting event) at different water potentials with different rates of sludge application in (A) silty clay soil and (B) loamy soil. Each value in this figure represents the mean DWR value at each application rate (i.e., the average of the values from three replicates and five depths). The , ** symbols represent linear contrasts significant at P 0.10 and 0.01, respectively