Fredlund and Xing (1994) Fit 
The Fredlund and Xing dialog contains the equation parameters necessary to mathematically represent the SWCC curve with the methodology published by Fredlund and Xing (1994). A description of the theory can be found in the SVSOILS Theory Manual.
af: The af field refers to a fitting parameter in the Fredlund and Xing (1994) equation. The af parameter is indirectly related to the airentry value of the soil.
nf: The nf field refers to another fitting parameter in the Fredlund and Xing (1994) equation.
mf: The mf field refers to another fitting parameter in the Fredlund and Xing (1994) equation.
hr: The hr field refers to the constant parameter in the Fredlund and Xing (1994) equation corresponding to the residual suction (kPa).
Fit: The Fit indicates whether the experimental data needs to be fit with the Fredlund and Xing (1994) equation.
Error: The Error field shows the difference between the fitted values and the laboratory values in terms of R2.
Residual WC: The Residual WC field refers to the calculated residual gravimetric water content from the Fredlund and Xing (1994) equation (kPa).
Wilting Point: The wilting Point is the water content corresponding to the wilting point suction for most plants (i.e., in the order of 1500 kPa).
AEV: The AEV field shows the airentry value calculated from the Fredlund and Xing (1994) fit of the soilwater characteristic curve (kPa).
Max. Slope: The Max. Slope refers to the maximum slope (on a semilog plot) of the Fredlund and Xing (1994) fit of the soilwater characteristic curve (unitless).
Click the graph button at the bottom of the dialog to display a graph.
