Table 3. Twelve-month nutrient requirements for 1000-pound range cows with calf birth dates in January.
Dry Gestation
3rd Trimester
Early Lactation

Lactation

Ration
Pasture
Ration
Pasture
Ration
Pasture
Ration		Spring
Pasture		Summer
Pasture		Fall
Pasture
Days90327531137
Daily Requirements in Pounds
Dry Matter
21
24
24
Energy (TDN)
10.98
14.30
13.73
Crude Protein
1.64
2.52
2.30
Calcium
0.05
0.07
0.06
Phosphorus
0.03
0.05
0.04
Production Period Requirements in Pounds
Dry Matter
1890
768
1800
744
3288
Energy (TDN)
988.20
457.60
1029.75
425.63
1881.01
Crude Protein
147.60
80.64
172.50
71.30
315.10
Calcium
4.50
2.24
4.50
1.86
8.22
Phosphorus
2.70
1.60
3.00
1.24
5.48
12-Month Requirements in Pounds

Totals for
Rations

Totals for
Pastures

Totals for
12 Months

Dry Matter
4458
4032
8490
Energy (TDN)
2475.55
2306.64
4782.19
Crude Protein
400.74
386.40
787.14
Calcium
11.24
10.08
21.32
Phosphorus
7.30
6.72
14.02