Table 3.

Effect of AI or NS breeding and RNG or MDW grazing on carcass performance of calf-feds¹

	Treatment					P-value2
	AI-MDW	AI-RNG	NS-MDW	NS-RNG	SEM	BRD	GRZ	B × G
n	17	10	24	24
Final BW, kg	623a	657a	620a	572b	15.9	<0.01	0.59	<0.01
HCW, kg	393a	414a	390a	360b	10.0	<0.01	0.58	<0.01
Backfat, cm	1.52a	1.52a	1.65a	1.14b	0.13	0.24	0.02	0.02
Marbling3	514ab	547a	546a	478b	32.0	0.51	0.51	0.06
USDA yield grade	3.03a	3.01a	3.02a	2.34b	0.22	0.07	0.06	0.07
LMA4, cm2	93.4	96.4	95.7	87.7	4.48	0.39	0.51	0.14

^abMeans within a row lacking a common superscript differ (P < 0.10).

¹Calves entered feedlot 2 wk after weaning.

²BRD = breeding treatment main effect; GRZ = grazing treatment main effect; B × G = breeding × grazing treatment interaction.

³Marbling:Small⁵⁰ = 450, Modest⁰⁰ = 500, Modest⁵⁰ = 550.

⁴LMA = Longissimus muscle area.