LLBUX":31u7bwpo said:Here is how it applies-
Actual Weight- birthweight / age in days = average daily gain
ADG x 205 + birth weight = 205 day adjusted weight
For a 600 pound weight taken at 200 days Calf weighed 70 pounds at birth
600 pounds minus 70 pound BW =530 pounds gained
530 divided by 200 = 2.65 ADG
2.65 x 205 = 543 pounds gained
543 + 70 (BW) = 613 pound adjusted 205 day weight
I think the BIF site explains itmidTN_Brangusman":2bbljigf said:Do you know how the adjusted birth weights are calculated?
The purpose of 205 day adjusted weaning weights is to let you compare calves to a standard age. Normally, that can be from 5.5 to 8 months of age. I had a bull calf that weaned at 990 lbs no creep feed and still nursing his mother. The rest of the story was he was born 11/10/2006 and I weaned him Labor Day, 2007 (nearly 10 months). His adj. weaning wt was 702. You cannot always go by actual weights.elkwc":jylgkwd1 said:I sell on actual weights and that is what I want to see when considering a bull. That applies to weaning and yearling weights. Many breeders refuse to provide actual weights. This is because they don't look as good in my opinion.
BC":2wgdox0d said:The purpose of 205 day adjusted weaning weights is to let you compare calves to a standard age. Normally, that can be from 5.5 to 8 months of age. I had a bull calf that weaned at 990 lbs no creep feed and still nursing his mother. The rest of the story was he was born 11/10/2006 and I weaned him Labor Day, 2007 (nearly 10 months). His adj. weaning wt was 702. You cannot always go by actual weights.elkwc":2wgdox0d said:I sell on actual weights and that is what I want to see when considering a bull. That applies to weaning and yearling weights. Many breeders refuse to provide actual weights. This is because they don't look as good in my opinion.
It's considerably more complicated than that.. Calves grow less as they get older, which really gives an advantage to early weaned/weighed calves with your formulaLLBUX":bu8yrsqb said:Here is how it applies-
Actual Weight- birthweight / age in days = average daily gain
ADG x 205 + birth weight = 205 day adjusted weight
For a 600 pound weight taken at 200 days Calf weighed 70 pounds at birth
600 pounds minus 70 pound BW =530 pounds gained
530 divided by 200 = 2.65 ADG
2.65 x 205 = 543 pounds gained
543 + 70 (BW) = 613 pound adjusted 205 day weight
Nesikep":jjcseqj6 said:It's considerably more complicated than that.. Calves grow less as they get older, which really gives an advantage to early weaned/weighed calves with your formulaLLBUX":jjcseqj6 said:Here is how it applies-
Actual Weight- birthweight / age in days = average daily gain
ADG x 205 + birth weight = 205 day adjusted weight
For a 600 pound weight taken at 200 days Calf weighed 70 pounds at birth
600 pounds minus 70 pound BW =530 pounds gained
530 divided by 200 = 2.65 ADG
2.65 x 205 = 543 pounds gained
543 + 70 (BW) = 613 pound adjusted 205 day weight
I'm not sure about every breed association but I know in some like mentioned above there are allowances for things like the dams age, ect. But when I take a calf to the auction I don't receive an adjustment because a calf's mother was 14 y/o or a 1st calf heifer. I would rather see the facts and let me do the adjusting.elkwc":3j7ti8rt said:Nesikep":3j7ti8rt said:It's considerably more complicated than that.. Calves grow less as they get older, which really gives an advantage to early weaned/weighed calves with your formulaLLBUX":3j7ti8rt said:Here is how it applies-
Actual Weight- birthweight / age in days = average daily gain
ADG x 205 + birth weight = 205 day adjusted weight
For a 600 pound weight taken at 200 days Calf weighed 70 pounds at birth
600 pounds minus 70 pound BW =530 pounds gained
530 divided by 200 = 2.65 ADG
2.65 x 205 = 543 pounds gained
543 + 70 (BW) = 613 pound adjusted 205 day weight
Very well stated. The time when a calf is weighed also influences their yearling weight greatly. And some breeders know those "sweet spots".
dun":3aqkg3zy said:The adjusted weight is like EPDs, it is meant to even the field for comparison. Hard if not impossible to compare the actual weaning weight if 1 calf is 160 days old and another is 300. If all people were interested in was actual weights you could hold calves an extra month or 2 and just report weaning weights. How useful would that information be when comparing the ability of the dam or sire be at siring/raising a calf. Just like EPDs, if you don;t like the data just ignore it and leave one more tool in the tool box.
I was always taught data out is only as good as that put in. When you fudge it to make it look better instead of reflecting was is real then that data becomes irrevelant and creates a mirage that too many believe until the wreck has hit. Most of the commercial breeders I know have seen it and why at least 80% of them want real data. The bull calf I related too earlier in my estimation would of weaned around 840 lbs. That is by the way I was taught in the 60's and 70's. Today depending on his mothers age, ect the adjusted could be much higher. Again we each have to use what experience has taught us is reliable and avoid using what has proven is inaccurate and doesn't work. As a mechanical specialist I would remove a bad tool instead of using it. I feel the same applies here. If a breeder wants to supply it that is fine but if he wants to sell me a bull then he had better be willing to provide me with the needed good information so I can make an informed decision. I have found basing decisons on smoke and mirrors usually results in a wreck.dun":146ogyhs said:The adjusted weight is like EPDs, it is meant to even the field for comparison. Hard if not impossible to compare the actual weaning weight if 1 calf is 160 days old and another is 300. If all people were interested in was actual weights you could hold calves an extra month or 2 and just report weaning weights. How useful would that information be when comparing the ability of the dam or sire be at siring/raising a calf. Just like EPDs, if you don;t like the data just ignore it and leave one more tool in the tool box.