The heights, i.e., depths, of all these trapeziums were about 20 cm, and the overall lengths of their upper sides increased from 20 to 35 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.