Unsaturated Hydraulic Conductivity Determined by the Hot Air Method for Some Danish Till Soils

Unsaturated hydraulic conductivity relations for topsoil and subsoil in 12 Danish till soils were obtained from measurements by the hot air method. In the range of pressure potentials (pF-values from 1.7 to 3.0) within which the method is most suitable the hydraulic conductivities were found to be within the range of 10^-10-10^-7 m s^-1 for topsoils and 10^-11-10^-8 m s^-1 for subsoils. The hydraulic conductivity relations obtained were briefly discussed in relation to the corresponding pF-curves. At any pF-value the subsoils differed more than the topsoils in hydraulic conductivity.