Re: pearl's list update

"swamp" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED]
> On Mon, 1 Dec 2003 15:21:14 -0000, "pearl" <[EMAIL PROTECTED]>
> wrote:
<..>
> >Show where the math is 'bad', swamp, also where the data
> >is 'misapplied and undocumented'.
>
> You came up w/ the wildly impossible figures. Fixing your calcs is
> *your* job, not mine.

Support your claims.

restore;

(Information from the USDA's Economic Research Service
shows that only one pound of beef is produced for every sixteen
pounds of grain consumed.
http://royal.okanagan.bc.ca/mpidwirn/agriculture/agriculture.html )

The figures I've worked out, using industry data, is total feed
(grain + silage/hay) required for beef gain.

Live-weight       900        1040        1146      1258          1403 lb

'harvest'                1    .....    2   ....     3      ....     4     ......   5
Fat  %              17.7 ........22.6  ..... 28.1 .......30.3 ..........34.0
Protein   %       14.5 ........13.9 .......12.6  ......12.0 ..........11.6
Water    %        51.3  ...... 48.0....... 43.9 ...... 42.3.......... 40.1
Bone     %        16.4 ....... 15.4 ...... 15.4 ...... 15.3  .........14.3
carcass weight   450          550         650         750           850 lbs.
http://ars.sdstate.edu/BeefExt/BeefReports/2000/influence_of_body_weight_and_mar.htm

protein + water = meat
(1) 65.8% of 450lbs carcass,   (4) 54.3% of 750lbs carcass.
                 =  296.1                                  =  407.25
- a gain of 111.15lbs of meat for + 300lbs of carcass weight-
or 37.0% of feedlot carcass gain.

of which the protein (meat DM) gain is
 (1) 14.5% of 450lb carcass    (4)  12% of 750lb carcass
              = 65.25    lbs meat DM         = 90 lbs meat DM
- a gain of 24.74lbs of meat protein for 300lbs of feedlot carcass
gain; 24.74lbs gain of meat protein for 358lbs liveweight gain.

Got it, or do we need to go through it line by line together?

['... An 800-pound, medium-frame steer calf will eat about
16.8 pounds of dry matter a day of a high-concentrate ration.
He will gain about 3.0 pounds a day with daily nutrients in his
feed at the level shown here.

The balanced daily ration for the 800-pound yearling steer is:

                                           Pounds
Corn                14.7
Soybean meal    0.52
Corn silage       10.00
Limestone           0.17
Total                 25.83
http://muextension.missouri.edu/xplor/agguides/ansci/g02052.htm ]

Using that figure, we can work out approximately how long the
(1) 900lbs-(4) 1258lbs animal was being fed, the total consumed,
then divide that by the actual DM meat gain of 24.75lbs to work
out feed (DM) : meat protein gain.

1258-900= 358lbs liveweight gain / 3lbs liveweight gain per day =
119.3 days; times a daily ration of 16.8lbs dry matter per day =
2004.24lbs feed DM; then divide by 24.75 lbs meat DM gain =
80.97 (lbs feed DM : 1 lb meat DM), or 81:1

> >> >Right?
> >>
> >> Wrong. Let's work backwards,

No.  Address what I've posted first.  Then you can work
backwards all you like.

<..>