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Dear all:
 
I once looked at translating Zadoks stages to the dimensionless =
development stage used by the Wageningen group (where 0 =3D emergence; 1 =
=3D anthesis; 2 =3D maturity). I did this for one cultivar of spring =
wheat and barley each. A simple logistic curve did well, except perhaps =
for the very beginning and end.
 
Mohammed, I suggest that you rustle up some phenology data for the =
cultivar(s) that you are working with and see if this will work for you.
 
Regards,
 
Frits van Evert
 
University of Minnesota
Dept. of Soil, Water and Climate
1991 Upper Buford Circle
St. Paul, MN 55108
USA
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