PRODUCING MARKET MILK IN NORTHWESTERN INDIANA. O 
which averaged 6,987 pounds of milk testing 3.6 per cent butterfat. 
Grade cows made up 78 per cent of those included in the 2-year 
study and the rest were purebred. Complete records for 2 consecu- 
tive years were obtained on 12 of the herds whose owners cooperated 
throughout both years. The number of cows in the herds is obtained 
by adding the cows in each herd each month and dividing the total 
by 12. 
Table 1. — Number of cows in herds, average yearly production of milk, and calves pro- 
duced each year. 
1915-16. 
1916-17. 
Herd No. 
Cows in 
herd. 
Calves 
produced 
per year. 
Production 
per cow 
per year. 
Cows in 
herd. 
Calves 
produced 
per year. 
Production 
per cow 
per year. 
102 
Number. 
13.6 
23.2 
27.5 
25.8 
16.1 
28.4 
18.9 
11.5 
18.4 
28.9 
16.5 
9.8 
14.4 
7.8 
Number. 
13 
20 
20 
17 
13 
23 
14 
13 
17 
25 
12 
8 
15 
6 
Pounds. 
6, 139. 9 
6, 957. 4 
6,562.6 
7,091.0 
6,331.4 
6, 309. 8 
7. 622. 5 
6,710.0 
9,063.0 
4,915.0 
6, 296. 9 
6,710.8 
9, 127. 
9. 452. 6 
Number. 
Number. 
Pounds. 
103 
20.5 
20 
6, 237. 
104 . 
106 
28.0 
18.7 
29.8 
19.4 
11.2 
13.7 
26 
21 
30 
17 
9 
13 
6, 890. 8 
6,162.3 
5, 660. 6 
7, 866. 2 
107 
108 
109 
110 
Ill : 
5, 778. 1 
9, 083. 4 
112 
113 
15.0 
9.8 
"15.2 
9.4 
18.2 
13 
10 
11 
8 
13 
5, 566. 7 
114 :.. 
7,007.6 
7,538.3 
9 127 5 
115 
116 
117 
6, 454. 6 
118 
37.5 
35.2 
32 
18 
6,455.2 
7, 306. 6 
119 
31.8 
17.8 
13.8 
17.3 
24.8 
22.5 
27.6 
15.6 
23.9 
33 
13 
16 
17 
22 
19 
27 
17 
24 
7, 750. 8 
121 ... 
7, 166. 3 
6,682.8 
7,933.8 
8, 156. 2 
9, 106. 
6, 947. 
122 
123 
- 
124 
125 ... . 
126 
127 
4, 779. 4 
128 
5, 465. 4 
Total 
333.5 
266 
404.0 
379 
20.8 
16.6 
6,877.0 
19.2 
18.0 
6, 987. 
According to these figures 87 per cent of the cows produced a 
living calf each year. 
Table 2. — Per cent of cows dry during the winter, summer, and year. 
Period. 
Winter. 
Summer. 
Year. 
Per cent. 
12.6 
13.2 
Per cent. 
12.1 
12.7 
Per cent. 
12.4 
13.0 
There was only a slight variation in the percentage of dry cows 
in the two seasons. This accounts for the uniformity of production 
of milk for the seasons. The calf crop was divided equally between 
seasons. 
