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Date: | Wed, 14 Feb 2007 18:02:36 +0100 |
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Aston,
unfortunately, GENCALC is currently not part of the
DSSAT-Software (version 3.5 has it). I guess the only
choice you have is the "visual eye fit" approach
described on page 35 in following book:
Hunt, L.A. and Boote, K.J. (1998) Data for model operation,
calibration, and evaluation In: Tsuij, G.Y., Hoogenboom, G.,
and Thornton, P.K. (eds.) Understanding options for
agricultural production. Kluwer Publishers.
Good luck !
Cheers,
Matthias
--
Prof. Matthias Langensiepen
Modelling Plant Systems
Institute of Crop Science
Faculty of Agriculture and Horticulture
Humboldt-University of Berlin
Invalidenstrasse 42
10115 Berlin
Germany
Chipanshi, Aston wrote:
>
>
>
>
> Hi,
>
> Could someone assist with how to go about tinkering with genetic
> coefficients when calibrating the CERES models (in particular barley and
> wheat)? We tried to follow the changes suggested in DSSAT v4.2 but we
> are getting extremely low yield values. We have a very good dataset on
> phenology and grain yield from experimental plots over a period of about
> 3 years. The yield values that we are getting don't make sense at all!!
>
> Thank you,
>
>
>
> ASTON
>
>
>
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