Dear all

  I am Harikrishna working on maize simulation model in relation
to
  different N doses and 4 slplits of N for each N doses. When I
run
  the model the predicted yield level will be satisfactory but
the
  yield respone for the split application of N at critical stages
of crop will be zero. So when  I calibrate few values in CO2-X-
axis and CO2-Y axis in the maize species (MZCER 980.SPE) file,
model predicted accurately yield levels of maize for split
application of N, at critical stages of crop growth. The
calibration of MZCER980.SPE what I followed is valid or not, if
not please suggest the correct way of calibration.

Yours
Harikrishna


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