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<blockquote data-quote="SRBeef" data-source="post: 799037" data-attributes="member: 7509"><p>I was thinking the same thing myself. When I can get a true 205 day adjusted weaning weight on a straight Hereford of 737 lb (from one of my target 1200-1300 lb cows) with no creep how much faster do I need? Most of my steers were in the lower 600 lb range but if I select for and build from my cows I am fairly certain I can get most of them to 1100 lb or close off of grazing corn within my 13-14 month harvest window. </p><p></p><p>My engineer's math:</p><p></p><p>13.5 months = 405 days. If I can get to say 650 lb avg at 205 days, 1100 lb goal - 650 lb at 205 days = 450 lb needed after weaning.</p><p></p><p>So to make my 1100 lb at 13.5 mo (405 days), I need to add 450lb in 200 days after weaning.</p><p></p><p>450lb/200 days = 2.25 lb/day average daily gain after weaning is required to hit the target.</p><p></p><p>In practice, they will be under that for the first 30 days after weaning but should be over that 2.25 lb/day once they hit the corn.</p><p></p><p>I'm going to try to put them on the corn today. I'd like to weigh them but my scale is buried under a lot of snow and more predicted for this afternoon so I better get moving! We'll see how it goes.</p><p></p><p>Jim</p></blockquote><p></p>
[QUOTE="SRBeef, post: 799037, member: 7509"] I was thinking the same thing myself. When I can get a true 205 day adjusted weaning weight on a straight Hereford of 737 lb (from one of my target 1200-1300 lb cows) with no creep how much faster do I need? Most of my steers were in the lower 600 lb range but if I select for and build from my cows I am fairly certain I can get most of them to 1100 lb or close off of grazing corn within my 13-14 month harvest window. My engineer's math: 13.5 months = 405 days. If I can get to say 650 lb avg at 205 days, 1100 lb goal - 650 lb at 205 days = 450 lb needed after weaning. So to make my 1100 lb at 13.5 mo (405 days), I need to add 450lb in 200 days after weaning. 450lb/200 days = 2.25 lb/day average daily gain after weaning is required to hit the target. In practice, they will be under that for the first 30 days after weaning but should be over that 2.25 lb/day once they hit the corn. I'm going to try to put them on the corn today. I'd like to weigh them but my scale is buried under a lot of snow and more predicted for this afternoon so I better get moving! We'll see how it goes. Jim [/QUOTE]
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