Fig. 2 Measured 
v plotted as a function of the multisensor capacitance probe (MCAP)-scaled frequency, SF for the calcic (open diamond) and surface (filled diamond) soil materials and calculated using the regression relationships listed in Table 2. (A) The least squares regression using Eq. [3] and ln-transformation of the pooled Texas-data appears to fit poorly. Nonlinear fits of Eq. [4] to the untransformed calcic and surface Texas-data were similar and, therefore, pooled. (B) Measured v and water contents calculated using calibrations reported by Paltineanu and Starr (1997), supplied by the factory, or developed in this paper are shown
