Table 2.

Volumetric soil water and air content (cm${}^3$/cm${}^3$) for each irrigation threshold.

Irrigation thresholds	Equivalent water content (cm${}^3$/cm${}^3$)a	Equivalent air content (cm${}^3$/cm${}^3$)a
$-15$	0.35	0.13
$-30$	0.33	0.15
$-45$	0.32	0.16
$-60$	0.31	0.17

^aCalculated with the van Guenuchten equation⁴⁷.