Mohammad: I suggest you refer to "Correlation of Five Wheat Growth Stage
Scales Used in the Great Plains", USDA, ARS, AAT-NC-7, July, 1983, A.
Bauer, D. Smika, A. Black. In the Zadoks scale, 50% anthesis occurs at
65; milk development (assume beginning of grain filling) at 71; maturity
at 92. Using the figures and tables in this publication should help you
resolve your problems.
          Al
 
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