Fig. 5 A comparison of electrical conductivity measurements by time domain reflectometry and conductivity bridge. {sigma}YZT values are given by Eq. [8] and {sigma}GT values result from Eq. [10]. In the legend, A and B refer to horizons of Temora soil. W refers to soil wetted with tap water. S refers to soil wetted with 0.05 M KCl solution. Filled symbols are {sigma}GT, and open symbols are the corresponding {sigma}YZT values