Fig. 3. Comparisons of volumetric water content from DPHP sensors at 5 (A) and 15 cm (B) among MSL, PSL, MSNL, and Ambient soil, and at 25 cm (C) among MSL, PSL, and Ambient soil. Vertical dashed lines highlight irrigation dates. Symbols (plus-x) along abscissa of each graph indicate significant differences among three treatments (P < 0.05), and x indicates significant differences between two treatments on a given day (at 1800 h).