Fig. 5. The near saturation water pressure, air pressure, and water flow (downward negative) in (a) a structured sandy clay loam field sample, L = 3.2 cm; (b) a repacked silty clay loam, L = 2.7 cm; and (c) a repacked loam, L = 6 cm. Air pressure (gauge) was measured in an artificial cavity at z (cm) above the lower boundary as indicated.