Lemlem,

I assume you have the DSSAT software.  If so, you need to look for the documentation that comes with the downloaded software.  Go to the directry named documentation, which has five subdirectories some on latest references relative to the models.  For your question, select subdirectory DSSATA35 and open Volume 4.  See the sections called 4-6 amd 4-7.  They may be helpful for you relative to minimum data requirements and also describing calibration and validation.

Good luck.
Ken Boote

________________________________________
From: DSSAT - Crop Models and Applications [[log in to unmask]] on behalf of Lemlem H. [[log in to unmask]]
Sent: Wednesday, June 06, 2012 4:33 AM
To: [log in to unmask]
Subject: DSSAT calibration

Dear All,
I want to calibrate and validate the CROPGRO(for tomato) and SUBTRO(potato)
models in semi arid condition.Could someone direct me where I could get
detail procedure which I could refere for the calibration and validation
process. What are the minimum input data requirements for calibration and
validation?
Lemlem.