Table 22. Range cow and calf performance on native rangeland and domesticated grass pastures during the 31 day spring portion of the lactation production period.
Native
Rangeland
(12-m RS)*

Native
Rangeland
(6.0-m SL)
Crested
Wheatgrass
Unfertilized
(4.5-m SL)
Crested
Wheatgrass
Unfertilized
(4.5-m Def)
Crested
Wheatgrass
Fertilized
(4.5-m TOR)
Length of Perioddays
31
16
31
76
31
Acres/Monthac
4.62
4.04
1.82
1.67
0.75
Acres/Period

ac
4.77
2.10
1.88
4.16
0.75
Cow ADGlbs
0.12
1.95
0.91
2.68
Cow Gain/Acrelbs
0.91
32.15
16.63
110.77
Cow Gain/Period lbs
1.92
60.45
69.16
83.08
Calf ADGlbs
1.80
1.80
1.91
1.79
2.18
Calf Gain/Acrelbs
11.70
13.64
31.49
32.70
90.11
Calf Gain/Periodlbs
55.80
28.80
59.21
136.04
67.58

*Based on estimated calf weight