Good information indeed, though I found the graph a bit wonky... I can't call it misleading, but I figured out after a while that at 50-55% mature weight you had 35% MORE heifers cycling than at 45-50%
For us, where most mature cows are in the 1500ish range (plus/minus about 200 lbs), heifers should be at 1000 lbs at breeding time. So far so good for the group we have, they're all in the mid 800's and we start breeding around may 21st, so they should be close to 70% mature weight. Back when we bred at 2 years (which increases mature weight about 10-20% BTW), we fed them lousy hay, but since we've come back to breeding at 15 months, I give them 3rd cut alfalfa if I have it, and give them as much as they'll eat. Of the two heifers we kept last year, they were both close to 1100 lbs and are now touching on 1250-1300.
As for weaning, I think heifers should be about at 650 lbs at 205 days, which is around 45% mature weight for us
