We have developed and tested some new tile drainage theory in a version of
CERES. See the reference below for the details. However, this code has not
yet been incorporated into the public DSSAT version of the model.


Garrison*, M.V., W.D. Batchelor, R.S. Kanwar. J.T. Ritchie. 1999 Validation
of the CERES-Maize water and nitrogen balances under tile drained
conditions. Agricultural Systems (1999):189-200.

Bill


At 08:21 AM 2/14/2001 -0500, you wrote:
>Does anyone know how CERES-Maize incorporates drainage type,
>drainage depth, & drain spacing in the water balance? Thanks
>very much for your input or suggestions.
>                                                 --monte o'neal
>                                                   Purdue Univ.
>                                                   West Lafayette, IN USA

Dr. William D. Batchelor
Associate Professor
Agricultural and Biosystems Engineering
219b Davidson Hall
Iowa State University
Ames, IA 50011
http://www.soybeans.ae.iastate.edu
ph- 515-294-9906
fax 515-294-2552
email [log in to unmask]