238 PRODUCTIVE FEEDING OF FARM ANIMALS 
feed their cows to the limit of economical production, and do not try 
to ascertain whether their cows are capable of making an increased 
production (Fig. 49). Until this is done, dairy farming, which 
is one of the most profitable branches of agriculture and animal 
husbandry, will not yield adequate returns for the labor it requires. 
Fic. 48.—Babcock test apparatus. (‘Productive Farming,” Davis.) 
Amount of Feed Eaten Annually by Dairy Cows.—The table 
given below shows the amount of different feeds eaten during the 
year, by cows in the dairy herds of nine experiment stations, with 
production of milk and butter fat as well as feed cost, according 
to Henry.*® The estimated feed units have been added by the 
Annual Feed Requirements of the Dairy Cow as Found by Nine Stations * 
Feed eaten Returns 
Num-| Pas- | Co2- Soiling a ee 
station | Berof | tare, | 28, | crops a ie 
years | days 3 “as roots, | Hay, | 7e¢ Milk, Fat, nits 
pews or | pounds BSE pounds|pounds| ™ 
silage, 
pounds 
Connecticut. . . 5 152 2029 8694 | 1830 | $53.46] 5498 279 5730 
New Jerse 6 168 2624 | 16753 | 1825 44.68 | 6165 277 7836 
Michigan.. 1 139 2774 3638 | 3986 35.96 | 7009 260 5964 
Wisconsin..... 3 180 1914 9448 | 1200 37.68 | 7061 299 5769 
Minnesota... .. 1 131 3435 5306 | 2029 37.82 | 6408 301 6439 
Missouri...... 1 191 3027 4380 35 30| 5927 248 6327 
Utahyesrssjatsen 1 187 1976 3692 | 2347 31.61 | 8783 339 5635 
Montana...... 2 150 1169 6468 32.45 | 5993 250 5903 
Nebraska..... 5 153 1305 2 4518 21.43] 5601 237 5094 
Average for 
nine herds 25 161 2250 5281 | 3076 $36.71 | 6494 277 6077 
* Connecticut Bulletin 29; New Jersey Reports, 1897-1904; Michigan Bulletin 166; 
Wisconsin Reports, 1905-7; Minnesota Bulletin 35; Missouri Bulletin 26; Utah Bulietin 68; 
Montana Report, 1905; Nebraska Bulletin 101. 
8“ Feeds and Feeding,” 10th ed., p. 427. 
