The maximum increases in effective rooting area were 15% and 60% under one- and
two-side irrigation, respectively, and the fractions of the total rooting
areas formed by the effective areas were 1.0 for plant–dripper
distances up to 20 cm, in both systems, and decreased to 0.74 and
0.62 at 60 cm in the one- and two-side systems, respectively.