Theodorus :
 
Bushels is a volume measure and varies from crop to crop.
 
The models write out bushels for documentation purposes only.  We use
biomass for model evaluation, including crop biomass and yield.  Please note
that the models also do NOT account for seed moisture and assume that seeds
are ovendry.  Yield trials and USDA reports normally include seed moisture
at 14 or 15 %.
 
I was unable to locate the conversion from bushels to lbs or kg for our
variety trial reports.
 
Gerrit
 
 
At , DSSAT - Crop Models and Applications wrote:
>At 12:45 PM 2/11/98 -0700, Theodoros Mavromatis wrote:
>>Dear DSSAT users,
>>
>>working on the evaluation of CERES-Sorghum using experimental data from
>>southeastern USA I face the problem of conversion of bushels of sorghum
>>to lb. It seems that CERES-Sorghum assumes that 1bu = 60 lb while from
>>the experimental data 1 bu ranges from 45 to 55 lb with a mean round 52.
>>>From reports regarding agriculture at Kansas I found 56 to be the
>>conversion number.
>>
>>I would really appreciate If someone out there can tell me how this
>>number varies and how this affect the model validation taking into
>>account that my experiemntal yields are expressed in bu.
>>
>>Thank you in advance
>>
>>Theodoros
>>--
>>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>>Theodoros Mavromatis                           tel: +303-497-8127
>>National Center for Atmospheric Research       fax: +303-497-8125
>>ESIG, P.O. Box 3000
>>Boulder, Colorado, 80307
>>USA
>>
 
 =======================================================================
Gerrit Hoogenboom
Associate Professor
Department of Biological and Agricultural Engineering
The University of Georgia
Griffin, Georgia 30223-1797, USA
 
Phone:  770-229-3438 (New !)
Fax:    770-228-7218
E-mail:  [log in to unmask] (New !)
http://www.griffin.peachnet.edu/bae
http://www.bae.uga.edu/dept/faculty/gerrit/
http://www.bae.uga.edu/dept/research/cropsim/
 =======================================================================