|
Parameter |
No. of studies |
Mean |
Median |
Minimum |
Maximum |
|
|
Arid zone |
||||||
|
|
Calf mortality risk (%) |
11 |
23.1 |
25.0 |
5.0 |
36.7 |
|
|
Female replacement mortality risk (%) |
5 |
6.2 |
4.9 |
2.0 |
10.0 |
|
|
Male replacement mortality risk (%) |
3 |
7.2 |
7.3 |
4.2 |
10.0 |
|
|
Cow mortality risk (%) |
8 |
8.2 |
8.5 |
2.0 |
12.9 |
|
|
Age at first calving (months) |
3 |
49.0 |
48.0 |
45.0 |
54.0 |
|
|
Calving rate (%) |
14 |
61.0 |
58.5 |
52.0 |
75.0 |
|
|
Milk offtake per lactation (kg) |
9 |
251.0 |
251.0 |
200.0 |
312.0 |
|
|
Offtake rate (%) |
6 |
11.7 |
9.2 |
6.5 |
19.5 |
|
|
Weight of mature cow (kg) |
10 |
246.0 |
251.0 |
225.0 |
260.0 |
|
|
Weight of mature bull (kg) |
5 |
322.0 |
322.0 |
255.0 |
376.0 |
|
Semi-arid zone |
||||||
|
|
Calf mortality risk (%) |
15 |
22.3 |
23.1 |
5.0 |
42.8 |
|
|
Female replacement mortality risk (%) |
5 |
6.6 |
6.7 |
2.0 |
10.0 |
|
|
Male replacement mortality risk (%) |
3 |
7.3 |
7.8 |
4.2 |
10.0 |
|
|
Cow mortality risk (%) |
13 |
7.6 |
8.9 |
2.0 |
12.9 |
|
|
Age at first calving (months) |
3 |
47.3 |
48.0 |
45.0 |
49.0 |
|
|
Calving rate (%) |
13 |
60.5 |
58.0 |
53.0 |
75.0 |
|
|
Milk offtake per lactation (kg) |
10 |
253.0 |
252.0 |
200.0 |
312.0 |
|
|
Offtake rate (%) |
3 |
12.3 |
10.0 |
8.0 |
19.0 |
|
|
Weight of mature cow (kg) |
9 |
251.0 |
251.0 |
225.0 |
286.0 |
|
|
Weight of mature bull (kg) |
7 |
329.0 |
322.0 |
255.0 |
376.0 |
