Fig. 6. Soil water retention curves for the conventionally tilled (CW1) and ridge-tilled (RW3) watersheds, as estimated by pedotransfer functions. Watershed means for _s and b (Eq. [1], Table 8) were used to plot these curves. Plotted points place the mean values for four dates of monitoring in both watersheds, indicating soil water potentials were similar between watersheds. Inset: predicted differences in between watersheds are greatest when soils are wet, and similar to those detected (Table 5).