Kelsey,

Greetings from hot and steamy Florida (95 F and high humidity).

I don't think you can use seasonal option, because you want to vary
fertilizer rates and seeding dates for each year.  Sequence should work,
but it is difficult to create, but it would give you water and N carry
over.  Gerrit Hoogenboom, does this really work?  If sequence does not
work, then you may need to use a straight File X, in which you specify a
different field with itis associated weather, sowing date, and
fertilization.  Of course, then you don't get water and N carry-over.
If you want the latter, then try sequence.

Ken Boote

Brandt, Kelsey wrote:

>Hi all,
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>I am currently trying to model a continuous wheat treatment within a 25 year experiment.  I have the fertilizer rates, seeding and harvest dates for each year that the experiment has been running.  How can I change the seeding dates for each year, and should I be using the seasonal or sequential option in DSSAT?
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>Kelsey Brandt
>Agriculture and Agri-Food Canada/Agriculture et Agroalimentaire Canada
>Telephone/Téléphone: 306-778-3107
>Facsimile/Télécopieur: 306-788-3188
>
>P.O. Box 1030, # 1 Airport Road
>
>Swift Current, Saskatchewan, Canada
>S9H 3X2
>
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