Bob,

PCYield uses all of the same files as any DSSAT model. Look in the MyFarm
directory under the installed PCYield, and you will see x-files and wth
files. In the main PCYIeld directory, you will find the .CUL and .ECO and
.SPE files. You can edit these as any.

We have a new process for estimating genetic coefficients from yield trial
data from breeders. We have just used it to estimate coefficients for about
90 currently-used cultivars from the Illinois yield trials. We could
provide these to you, or we could provide the software to you if you want
to estimate coefficients for the Nebraska trials. Let me know.

Best regards!

Jim Jones

At 03:54 PM 8/24/00 -0500, you wrote:
>Dear DSSATers,
>     I have PCYield running for some sites, but want to try some things
>that the PCYield interface doesn't give me access to. For example, I will
>have to calibrate coefficients for a new semi-determinate genotype.
>     Any advice? Should I enter the work in DSSAT? Or manually edit the
>PCYield files to match the treatments I'm interested in? (Any hidden
>pitfalls to using the PCYield interface?)
>
>Sincerely,
>Bob Caldwell, Cropping Systems Specialist,
>   Dept. of Agronomy & Horticulture/SEREC/NEREC
>   University of Nebraska - Lincoln
>   306 Keim Hall, P.O. Box 830910, Lincoln, NE 68583-0910
>[log in to unmask]    Phone: (402) 472-4792. FAX: (402) 472-7904.

James W. Jones
Distinguished Professor
Agricultural and Biological Engineering Department
University of Florida
Gainesville, FL  32611

Tele:           352-392-8694
Fax:            352-392-4092
E-mail: [log in to unmask]