Rural Find

LIVESTOCK UNITS

The term livestock unit (LSU) or ewe equivalent (EE) is used to express the annual feed requirement of a “standard” 55 kg breeding ewe rearing a single lamb.

Carrying capacities are based on stock numbers carried at 30 June.

Note: as goats may be browsing scrub and weeds, and because they do not readily consume clover, a direct LSU comparison with other livestock classes may not apply.

One livestock unit requires approximately 520 kg good-quality pasture per year.

Table of Livestock Conversion Factors

Livestock class 
Weight in kilograms
Production
LSU
Sheep
    
  
Weight at mating
Lambs weaned
 
 
 
45
90%
0.85
Ewe
55
100%
1.00
 
65
130%
1.25
     
  
Pre-winter weight
  
 
 
30
Slow growth rate
0.7
Hogget
40
Medium growth rate
1.0
 
50
Fast growth rate
1.2
     
Ram
 
75
0.8
     
Beef Cattle
 
350
Calves weaned
 
 
400
68%
3.7
Breeding cow
400
83%
4.4
 
450
88%
5.3
 
500
90%
6.3
Weaners
 
135-270
3.5
     
 
 
200-400
Slow growing
3.7
Heifers, steers, bulls
200-465
Rapid growing
4.6
 
350-500
Rapid growing
4.7
 
600
6.0
     
Dairy cattle
  
Fat yield (kg)
 
 
 
 
350
140
6.1
Cow
400
160
6.8
 
400
180
7.3
 
450
200
8.0
Jersey yearling
 
180-320
3.5
Fresian yearling
 
225-430
4.5
Jersey calf
 
25-180
2.0
Fresian calf
 
35-225
2.5
Deer (red)  
Fawning
 
Mature hind
100
 
90-95
1.9
15-27 mth hind
80-100
 
1.8
6-15 mth hind
50-80
 
1.2
  
Dressing %
  
Mature stag
185
59.9
 
2.2
15-27 mth stag
105-140
58.2
 
2.1
6-15 mth stag 
57.2
  
     
Deer (fallow) 
Fawning %
  
Use 0.4-05.5 of red deer values 
80-85
  
     
Goats (dairy)  
Milk yield (litres)
 
Does    
Grass only
50-60
 
550
2.0
Browsing
45
 
350
1.5
     
Goats (purebred angoras)  
Mohair (kg)
 
Does    
Stud
40
 
 

 –

2-2.5

1.0
Other 
0.7
Bucks    
Stud
50
 
 
3.5
1.0
Other  
0.8
Hoggets  
1.8-2
0.5
     
Goats (cashmere)  
Cashmere (g)
 
Does
25-35
 
 Feral av 30
Farmed av 60
0.7
Bucks
30-60
 
0.7
 
Beef Cows

To mate at 15 months

Approx. age (months)

Weight (kg)

 

Approx. age (months)

Weight (kg)

Weaning

5-6

180

1st calving

24

350-380

1st winter, June

10

220-250

2nd mating

27

340-390

1st mating

15

250-290

3rd winter

34

380-430

2nd winter

22

320-350

2nd calving

36

420-470

Mating at 2 yrs

Approx. 330 kg 2nd winter; 360 kg at mating; 480 kg at 1st calving

Beef Bulls, Steers, Heifers

These are desirable target liveweights for rapid finishing systems

Weaning70 kg
Mid November100 kg
Mid March180 kg
Mid June230 kg
1 September270 kg
Mid December410 kg*
Mid February440 kg*

*Mid Dec to mid Feb is slaughter period

Sex effects

Steers and heifers will be ablut 10% and 20% lower in weight, respectively, than bulls.

 

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