We thank Huisman and Vereecken (2006) for their close reading of our paper and their suggestions for improving measurements of the soil bulk electrical conductivity, σa, using time domain reflectometry (TDR) waveforms. In our original paper (Evett et al., 2005), we suggested that the TDR calibration model for water content (ϴv, m3 m−3) could be improved by including σa and the effective frequency, fvi, of the TDR pulse: 
\[{\theta}_{\mathrm{v}}\ =\ a\ +\ b[c_{\mathrm{o}}t_{\mathrm{t}}/(2L)]\ +\ c[{\sigma}_{\mathrm{a}}/(2{\pi}f_{\mathrm{vi}}{\varepsilon}_{\mathrm{o}})]^{0.5}\]
where εo is the permittivity of free space (8.854 × 10...

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