Hello fellow listers:
        I am currently working on a large scale wheat yield model and I
have everything constructed with the exception of yield attenuation as a
result of high temperature stress during seed head development (primarily
double ridge to terminal spikelet or anthesis).  I have read scads of
papers with different heat treatments but the variability is quite large.
Does anyone have any suggestions as to a "first approximation" general
rule to go by that will allow the model to attenuate yield as a result of
heat stress during the seed head developemnt stage (provided that there is
not a compensatory effect during grain filling)?  Thank you for your help.

Have a nice day,
Matt Reeves

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Matt Reeves                             PHONE: 406 243 6228
                                        FAX:   406 243 4510
NTSG                                    EMAIL: [log in to unmask]
University of Montana                   http://www.forestry.umt.edu/ntsg/
Missoula, MT
59812
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