8 
BULLETIN T36, U. S. DEPARTMENT OF AGRICULTURE. 
containing 1,437.41 pounds of butterfat. Accordingly, under the 
open-shed system there was a total increase for the period considered, 
about 2.71 months, of 2,732.2 pounds of milk and 97.74 pounds of 
butterfat, or an average for each cow of 130.1 pounds of milk and 
4.6 pounds of butterfat. The total number of months compared 
under each system was 57. Calculations from these figures indicate 
that there was an average monthly increase of 48 pounds of milk 
and 1.7 pounds of butterfat for each cow while stabled in the open 
shed. 
Tables 2 and 3 show, respectively, the feed and digestible nutrients 
in the feed consumed by the two groups covering the same period of 
time as the production shown in Table 1. Where the figures in 
Table 1 are an average of two years the feeds in Tables 2 and 3 are 
also an average of two years. 
Table 3. — Digestible nutrients in feed consumed. 
Open-shed group. 
Closed-barn group. 
Feeds. 
Protein. 
Carboh}'- 
drat.es. 
Pat. 
Protein. 
Carbohy- 
drates. 
Fat. 
Concentrates: 
Pounds. 
515. 98 
698. 37 
951.57 
44.98 
Pounds. 
5,159.82 
2,324.19 
692. 31 
Pounds. 
261. 73 
167.61 
225. 07 
13.80 
Pounds. 
406. 82 
677. 37 
985.30 
Pounds. 
4,068.24 
2, 254. 30 
716. 85 
Pounds. 
206. 36 
162. 57 
233. 05 
37.72 
534. 64 
6.56 
Total 
2.210.90 8,176.32 
668. 21 
2,107.21 
7,574.03 
608.54 
Roughage: 
84.91 
438. 98 
345. 61 
73.26 
1.71 
19.34 
2.62 
312.39 
1,129.29 
1,295.36 
378. 85 
24.40 
390. 50 
290. 71 
7.21 
614.52 
202. 24 
199.12 
1. 580. 87 
767. 28 
1,029.66 
46.91 
20.85 
. 47.16 
33.51 
35.20 
17.35 
.68 
10.63 
214. 54 
3.54 
6.45 
13.03 
Total 
1,026.51 
3,592.35 
118.46 
966. 43 
3,821.50 
113.49 
Silage and roots: 
Corn silage 
675. 61 
9,212.85 
429.93 
495. 34 
6.68 
6, 754. 65 
400. 80 
315. 22 
13. 36 
Total 
675. 61 
9,212.85 
429. 93 
502. 02 
7, 155. 45 
32S. 58 
3, 913. 02 
2.55 
20, 981. 52 
13.67 
1,216.60 
.79 
3,575.66 
2.49 
18, 550. 98 
12.91 
1 , 050. 61 
Pounds digestible nutrients required to 
.73 
It may be noted in Table 3 that when the cows were kept in the 
open shed they required more digestible nutrients. However, the 
quantities of digestible nutrients required to produce one pound of 
fat in each of the two stables did not vary appreciably. 
