Hi Karl,
 
Concerning your question on modelling grassland production: The CENTURY
model was originally developed for simulating grass production and soil
organic matter dynamics in the the natural grasslands of the
North-American Great Plains. This model has been quite widely and
internationally used. See the various articles by W.J. Parton et al.:
Soil Sci. Soc. Am. J. 51:1173-1179 (1987); or Soil Sci. Soc. of America,
Special Publication 39, pp. 147-167 (1994); or Global Biochem. Cycles 7:
785-809 (1993); or Biogeochemistry 5: 109-131 (1988). Contact Dr. W.J.
Parton, Colorado State University, Fort Collins, Co.
 
Besides, the most recent version of DSSAT also has a new grassland
option. I also expect (but don't know any names) that someone in
Australia has done some work on grassland modelling.
 
Succes!
 
Arjan Gijsman
CIAT
Colombia
 
> -----Original Message-----
> From: Dr.Karl Schneider [SMTP:[log in to unmask]]
> Sent: Monday, September 29, 1997 7:13 AM
> To:   [log in to unmask]
> Subject:      Re: Grassland/rangeland Model
>
> Hi,
> I am working on incorporating CERES Models into a GIS based landscape
> model for evaporation and plant growth modelling. Since major
> portions of my testsite is grassland, I would like to adapt CERES
> wheat / barley to model the growth of meadows / grasslands.
> Does anybody already have some experience in modelling grassland or
> in adapting CERES for modelling grass growth?
> I would also be interested in learning if dedicated models to
> simulate grass growth are available somewhere?
> Thanks very much in advance
> Karl
>
> Dr. K. Schneider
> Institute for Geography
> University of Munich
> Luisenstr. 37
> D-80333 Munich / Germany
> Tel: +49 89 5203 371
> Fax: +49 89 5203 321
> E-mail : [log in to unmask]
>