Heliodoro:
 
I'm not a potato modeler and am not familiar with the meaning of TC for the
potato model.
 
However, you have a good environment for testing temperature sensitivities.
 Use your mountains and elevation differences to give you temperature
differences at the same basic planting date, daylength and irradiance.  I'd
use at least three sites differing widely in temperature.  Of course this
presumes that you will have weather stations to measure at least daily
maximum and minimum temperature and that you can provide water to minimize
water deficits.
 
Good luck.
Ken Boote
 
At 06:04 AM 11/4/98 +0500, you wrote:
>---------- Forwarded message ----------
>Date: Tue, 3 Nov 1998 05:59:58 +0500 (GMT)
>From: Heliodoro Arguello <[log in to unmask]>
>To: [log in to unmask]
>Subject: Critical temperature measure
>:
>
>We are carring out an experiment to determine genetic coefficients for
>four varieties of local potatoes, in order to validate the simulation
>model for potatoes included in the recent DSSAT version. We are very
>interested to use DSSAT in strategic decissions for agrotechnology
>transfer in potatoes.
>
> I need your help related with the measure of critical
>temperature (TC) for our potatoes varieties. In Bogota the maximun
>temperature is 21 C degrees. We are considering an experiment to
>determine how temperatures under 21 C degrees inhibite the tuber development.
>However we have not experience to measure that. You or other can help us
>to design the experiment?
>
>We are considering the possibility to take some coefficients, from
>similar conditions and try them, is that way possible?
>
>I am waiting for your answer.
>
>Heliodoro Arguello
>Facultad de Agronomia
>Universidad Nacional de Colombia
>