N. C. DAS GUPTA 205
EXPERIMENTAL
In January 1939, 12 animals were divided
into three groups containing two Hissar cows and
two Murrah buffaloes in each group. Each animal
of a group was comparable in age and days in milk
to an animal in each of the other two groups
Effect of berseem on milk yield
The average daily milk yield of each animal
under the three treatments during the 16
weeks of experiment has been recorded in Table
XII. Animal number 2 Hissar in group I was
abnormal from the ninth week of experiment.
The milk yield figures shown for this animal from
week ending March 27 are computed.
TABLE XII
Distribution of animals into different groups and their milk yield in lb.
Breed .
.
.
.
Age on 1st January 1939
Average age. of group .
Days in milk on 1st Jan-
uary 1939.
Average days in milk .
Liveweight (lb.) . .
Average liveweight (lb.).
Initial milk yield . .
Average initial milk yield
Milk yield per day for
week ending—
23-1-39
. .
30-1-39
. . .
6-2-39
. . .
13-2-39
. . .
20-2-39
. . .
27-2-39
. . .
6-3-39
. . .
13-3-39
. . .
20-3-39
. . .
27-3-39
. . .
3-4-39
. . .
10-4-39
. . .
17-4-39
. . .
24-4-39
. . .
1-5-39 . . .
8-5-39
. . .
Average milk yield per
day
Average milk yield per
day of group
Group I
1 H
6yr 11m
6
814
6.4
14.4
13.9
13.2
12.6
12.8
11.8
11.2
11.4
12.1
12.5
12.4
12.3
11.8
12.0
11.8
11.5
12.2
2 H
7yr 2m
3 M
5yr 4m
7 years 7 months
77
63
57 days
788
1185
983
12.3
19.9
16.85
12.3
11.8
9.0
8.1
6.9
5.9
5.7
5.4
5.2
5.1
5.0
4.9
4.8
4.7
4.6
4.5
6.1
19.9
20.5
28.1
20.5
19.8
19.3
18.4
19.1
20.7
21.0
21.2
21.0
20.5
20.0
18.5
18.5
19.9
14.60
4 M
11yr 0m
81
1146
20.8
20.8
21.3
20.7
20.6
20.0
19.7
18.3
19.5
21.2
20.5
21.0
21.0
20.0
20.3
19.3
19.0
20.2
Group II
5 H
6yr 11m
8
698
15.4
15.4
15.3
14.0
13.2
12.1
10.1
10.4
10.1
10.3
9.5
10.0
9.8
8.8
8.5
8.3
8.0
10.6
6 H
8yr 11m
7 M
5yr 3m
7 years 10 months
83
78
51 days
868
1155
1027
9.9
14.9
15.67
9.9
9.9
9.4
8.9
9.0
8.5
8.4
8.5
8.3
8.5
8.5
7.8
7.3
7.5
7.0
7.0
8.3
14.9
15.1
14.2
13.9
13.2
12.7
11.6
12.0
12.8
12.7
12.5
9.5
9.5
9.3
9.0
7.8
11.7
12.86
8 M
10yr 5m
34
1192
22.5
22.5
20.4
19.7
21.7
21.3
20.3
19.7
20.2
21.1
21.5
21.8
21.5
21.3
21.3
21.5
21.0
20.9
Group III
9 H
6yr 9m
12
932
14.6
14.6
14.4
13.2
12.1
11.5
10.7
10.3
9.5
9.6
9.0
9.3
5.0
6.5
7.5
7.3
6.5
9.5
10 H
9yr 6m
11 M
5yr 6m
8 years 3 months
92
39
52 days
788
1122
991
15.9
18.8
16.45
15.9
15.6
14.8
14.1
14.2
13.1
12.5
13.2
12.8
13.5
13.3
12.8
12.3
12.1
11.5
11.3
13.1
18.8
18.8
17.8
17.0
16.7
15.8
15.2
15.6
15.4
15.3
15.0
15.0
14.5
15.0
14.8
14.8
15.8
12.58
12 M
11yr 3m
64
1132
16.5
16.5
17.0
15.2
14.1
13.7
13.5
13.0
12.5
12.3
11.8
11.5
11.0
10.0
9.0
8.0
6.0
11.9
The statistical analysis of the average milk yield
of each cow does not show any significant variation
in the milk yield from group to group. This non-
significance might be due to the difference in the
basal milk yield from animal to animal. But the
results, after covariation of basal and the average
milk yield of each animal, also do not indicate any
significant difference in the milk yield due to the
different feeding treatments, the average milk
yield being 13.94, 13.68 and 12.42 for the three
treatments, with a standard error of 0.8291. The
animals of all the three groups maintained their
liveweights quite satisfactorily.