Fig. 3. The simulated salt distribution at the beginning (initial) and end of the growing season for four root distributions. The numbers in the key refer to the maximum depth of root penetration and the letters refer to whether the roots were predominantly shallow (s) or deep (d) within the depth of penetration. The irrigation water salinities were (A) 1.75 dS m^-1 and (B) 9.5 dS m^-1.