Model                                     AIC       deltaAIC        AIC wgtModel Likelihood        no.Par.     -2*LogLike
psi(.),p(.)                             22.39           0.00         0.4196         1.0000              2          18.39
psi(.),p(rain)                          23.35           0.96         0.2596         0.6188              3          17.35
psi(gully),p(.)                         23.89           1.50         0.1982         0.4724              3          17.89
psi(gully),p(rain)                      24.85           2.46         0.1226         0.2923              4          16.85
