2019/07/29 by Williams, P. J.
paper · doi:10.4224/40000663
Pressure membrane apparatus is widely used for the investigation of soil moisture suction. The results obtained are usually expressed in the form of moisture content versus suction (pF) curves. They have wide application in engineering, agriculture and other fields, where moisture movement, pore water pressures and related phenomena are being considered. The pressure membrane apparatus can be used to much higher soil suction values than is possible with the simpler suction plate apparatus, where the suction is limited by the instability of a water column to a pressure of about -13 psi (0.92 kg/cm2).