Model                                     AIC       deltaAIC        AIC wgtModel Likelihood        no.Par.     -2*LogLike
psi(.),p(rain)                          23.54           0.00         0.4056         1.0000              3          17.54
psi(gully),p(rain)                      23.88           0.34         0.3422         0.8437              4          15.88
psi(.),p(.)                             25.70           2.16         0.1377         0.3396              2          21.70
psi(gully),p(.)                         26.07           2.53         0.1145         0.2822              3          20.07
