1Means of yr 1 and 2 were pooled by treatment if treatment × year effect was not detected (P > 0.10).
2EW90 = heifers early weaned and limit fed a high-concentrate diet at 3.5% of BW (as fed) in drylot until d 90, then grazed on Bahiagrass pastures until d 180.
3EWRG = heifers early weaned, grazed on ryegrass pastures until d 60 (yr 1) or 90 (yr 2), then grazed on Bahiagrass pastures until d 180.
4Treatment comparison within sampling day.