APPENDIX 4.
(Extracted from a report by the School of Agriculture, Cambridge University, on the scheme for inquiry into the causes of removal of cows from dairy herds in the eastern counties.) Table showing the percentage wastage of dairy cattle according to the proportion of homebred cows entering the herd.
121
21.02 17-21 17:26 30-36 23-06 19-57 31-95 24-82 22-27 27-71±0.43 21-30 0.39 19.58+0.32
1928-29.
1929-30.
1930-31.
All 3 years.
Percentage of homebred
cows in total entrants.
0-49. 50-89. 90-100. 0-49.
50-89. | 90-100. 0-49.
50-89. 90-100.|
0-49.
50-89.
90-100.
No. of herds ...
152
173
No. of cows ...
3,696
4,230
222
5,539
142
3,537
169
3,907
5,540 226
160
3,628
129
2,957
199
4,782
454
10,861
471
F60'II
647
15,861
Sterility
5.60
4.54
3.34
8.51
60.9
5.06
8.68
7.03
5.25
7.58 +0.25
5-74 +0-22
Abortion
0.68
0.40
0-85
0.82
0.92
0.92
0.74
0.95
0.54
0-750-08
Tuberculosis...
1.30
0.88
0.76
1.55
0.97
1.08
1.19
1.35
1.34
1.34±0.11
0.73 ± 0·08 1-04+0-10
4.52+0.16 0.78±0.07
1.05+0.08
Johne's disease
0.49
0-31
0.38
0.57
0.33
0.38
0.64
0.81
0.56
0-560-07
0.45+0.06
0.44±0.05
Wasters
0.76
0.54
0.45
66.0
0.61
0.49
0.80
0.78
0.50
0.85±0.09
0.63±0.08
0.48±0.05
Garget
0.16
0.28
0.27
0.22
0.33
0.11
0.25
0.17
0.27
Other udder troubles
1.46
1.06
0.72
1.16
0.87
0.78
0.85
0.91
0.86
1.160-10
0.96±0.09
Died...
0.70
0.87
0.88
1.19
1.10
66.0
1.79
1-25
1-26
1-220-11
0-210-04 0-270.05 0.21 0.04
1.05±0.09 | 1.03+0.08
0.78+0.07
Accident
0.43
0.12
0.14
0.34
0.31
0.35
0.39
0.17
0.25
Miscellaneous
1.19
0.85
0.71
1.19
0.61
0.61
1.52
86.0
0-77
0-390-06 1.33±0.11
Total disease...
12.77
9.85
8.50 16.54
12.14 10.78 16.85 14.40
0.69±0.07
11-6015-360-35 11-87±0.31 10-230-24
0.20 0.04 0.25±0.04 0.800-08
Tuberculin test
0.46
0.21
0.60
0.34
0.69
0.31
1.68
0.81
0-73
Low yielders.
5.01
3.22
2.93
5.85
4.09
3.95
4.88
3.98
80 F
Old age
Trade ...
0.78
0.99
1.08
1.10
1.07
0.74
1.43
0.58
0.92
2.00
2.94
4.15
6.53
5.07
3.79
7.11
5.07
4.94
0.54 0.07 3.72 +0-18
4.26+0.19 1.100.10 0.910-09 0-83+0.09 5.24+0.21
5-18+0.21
0.54+0.06
3.63+0.15
0-920-08
4.26+0.16
Total disposals
128