dictionary {
* file growth2.dct
* Exponential growth - model 2 -  with limitation
        str60  _model
}

"S  W=W+dt*GR         Weight (g)                  "
"R  GR=RGR*(Wmax-W)   Growth rate (g/day)         "
"I  W=5               Initial weight (g)          "
"P  RGR=0.1           Relat. growth rate (g/g/day)"
"P  Wmax=150          Maximum weight (g)          "