Stepwise Model Path 
Analysis of Deviance Table
Querpube ~ pradyy + ddeg556 + bio4 + prcp49 + slp + topos + dem_aspv +
dem_flacc10rd + prcp103 + soil_calc + s_grund + I(pradyy^2) +
I(dem_aspv^2) + I(dem_flacc10rd^2) + I(prcp103^2) + I(soil_calc^2) +