Thank you all for your help.
I am using DSSAT v4.0.2.0. I see that in the FileX that emergence date is
an option, however the model is unresponsive to any changes in this value.
I am using a planting depth of 5 cm.
My weather file is lacking TAVE and TAMP values, I will look into creating
those as suggested. I will also look into ajusting GDDE (growing degree
days to emergence) in the ecotype file.
Thanks, and feel free to contact me if anyone has more ideas.
Kendall DeJonge
On Fri, Jul 24, 2009 at 9:31 AM, Anapalli, Saseendran <
[log in to unmask]> wrote:
> Hi,
> I did not use the latest version of DSSAT (4.5) but did use the DSSAT
> 4.0 for some simulations. One thing I noticed was that the 'emergence
> date' in planting details section works only in the case of potato and
> not other crops!. Was this corrected in the 4.5 version? What is the
> version Kendal is using?
> Thanks
> sasi
>
> Saseendran S Anapalli, Ph. D.
> Crop Scientist
> Agricultural Systems Research Unit
> USDA-ARS
> 2150 D Center Ave.
> Fort Collins, CO-80526
>
> -----Original Message-----
> From: DSSAT - Crop Models and Applications
> [mailto:[log in to unmask]] On Behalf Of Jon I. Lizaso
> Sent: Friday, July 24, 2009 1:00 AM
> To: [log in to unmask]
> Subject: Re: CERES-Maize emergence calibration
>
> Hello Kendall,
> In the experiment file (*.mzx) you can specify emergence date. In the
> section *PLANTING DETAILS you indicate planting date (PDATE) and
> emergence
> date (EDATE). The model simulates emergence in case this information is
> not
> available. But if you know emergence dates in your experiments you
> better
> reduce uncertainty associated with inputs.
>
> Does this solve your problem, or still you need some fine tuning of
> genetic
> coefficients?
>
> Best regards,
> Jon
>
>
> Jon I. Lizaso
> Universidad Politecnica de Madrid
> Dpto. Produccion Vegetal: Fitotecnia
> Senda del Rey s/n
> 28040 Madrid, SPAIN
> Tel: (+34) 91 452 4900 ext 1671
> Fax: (+34) 91 544 9983
> http://www.etsia.upm.es/GRUPOSINV/AgSystems/
>
>
>
>
> -----Mensaje original-----
> De: DSSAT - Crop Models and Applications [mailto:[log in to unmask]]
> En
> nombre de Kendall DeJonge
> Enviado el: Friday, July 24, 2009 12:04 AM
> Para: [log in to unmask]
> Asunto: CERES-Maize emergence calibration
>
> Hello all,
>
> I am a PhD student at Colorado State University using DSSAT and
> CERES-Maize
> to evaluate limited irrigation of corn. Model simulations I have
> created
> generally agrees with observed data. However, all growth parameters
> occur
> approximately 6-10 days earlier in the model than observed, including
> emergence, anthesis date, leaf #, LAI, etc. I am curious if there are
> any
> adjustments that can be made to the model to push emergence back to
> observed
> dates. Obviously, the planting date could be adjusted, but I am looking
> for
> any in-model parameters that can be used for calibration.
>
> Any help would be appreciated! Thank you,
>
> Kendall DeJonge
>
> --
> "Do. Or do not. There is no try."
> -Yoda
>
--
"Do. Or do not. There is no try."
-Yoda
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