FIG. 4. Cross-sections of the three-dimensional soil water content distribution after 1 d with constant water potential at the root collar h = –1000 cm (Collar Boundary Condition 1, Table 1). Comparison between the reference (extreme right) and 10-fold increase of xylem conductivity (K_x), radial conductance (K_r*), and saturated soil conductivity (K_s). Root architecture is shown in white.