Fig. 2 The expected error from using a fixed slope of 0.027 in Eq. [1] for a wide range of temperature and water potential assuming the interactions between temperature sensitivity and water potential given in Fig. 1 are the correct ones. (A) in situ stem and (B) C-52 sample chamber psychrometers. In both panels, a negative percentage of error indicates that the water potential calculated according to Eq. [1] was closer to 0 MPa than the actual water potential

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