

‘A STUDY OF RATIONS FED TO MILCH COWS. 99 
protein in the average of all the rations is.in accord with Wolff’s 
ration (2.5 pounds digestible protein), and the rations which 
seem to have given the best returns contained more protein than 
Wolff's standard calls for. From the fact that the best butter-fat 
yields were obtained from a ration containing less than 31,000 
calories of potential energy, it seems fair to assume that those 
which contained upward of 40,000 were quite excessive. 
ABLE 37) 
Summary of rations fed and yields of butter-fat obtained from 
sixteen herds examined. The yields of butter-fat are classt- 
fied tn accordance with the nutritive ratios of the ration and 
the amounts of digestible protein which they contain. 















AVERAGE YIELDS OF 
SUMMARY OF RATIONS FED. BUTTER-FAT 
PER Cow IN 5 DAYS. 
Fe  ¥ Nutritive Digestible 
2 A ak Ratio. - Protein. 
= ok oe vo 
ae Fs = 5 ae) o 5 
Reference No.| $ 5 nS ect Ps re va ena ae 
Bite ote NN ie) ae) eT My eh at wares 
w Ay Fob > fa) ra n 5 a |? ¢q 
Bie os | 2s) Ses ilsssis¢e 
O i Gabe capo. nee |e 
Lbs. EBs ey Calsom lL bse iobse;  Lbso EDs: 
1, - 25.4 2.50 6.0 | 33450 — 4.6 4.6 — 
2 - 27.2 2.80 6.0 37000 — 42 Ax? = 
Gare >}. 20.9. | 3.00 erey yee W898) Sot TL i ieee CC Te 
4, - - ay. 2.60 TO he OG00 ob sek — 3.5 —_ 
Sea A 29.0 | 3-15 5:5. fe 3Q400 1 A: Veerd st ar 
6, - - 26.6 2,05 8.0 > 3480071 93.7 — — 5 ee 
5 ta. - 32.0 2.45 8.5 42600 | 4.6 — 4.6 — 
8, - - 33-7- | 3-15 6,07" | 413500] tom 43° 1.4.3 = 
Q, - - 22.8 2.15 6.5 29950 | 3.8 — — 3.8 
10. 2 24.4 2.30 6.5 | 32100] 5,ot| — 5.0 — 
1 ae - 20.4 2:75. 5-5 | 34450 4.0 4.0 ais 
I2, - : 23.4 3.00 4.5 30750 titan (nares) 5.5 a 
ie ee =. 20.5 2:20 6.0° | 28750 —~ Pe, — 3.6 
14, - - 26.2 2.65 6.0° | 33750 — 4.7 4:7 = 
15, - - 23.8 1.35 11.5 30900 | 3.3 — — B23 
ro; o» - 22.3 1.45 9.5 29600 3.8 — —- 3.8 
Average, 26.4 | 2,50 6.0 GSG00 tin 3-0 a 2. Oui 4.0% | S.6 






*As here tabulated, the weights of protein are given to the nearest .o5 of a pound; thus 2.51 
Ibs. are called 2.50, etc. 
+ As here tabulated, the nutritive ratios are taken to the nearest .5; thus 6.2 is called 6; 6.4 is 
called 6.5, etc. 
+ Cows nearly all new milch. Nutritive ratior : 6.4. 
The evidence at present at our command would seem to indicate 
that the quantity of digestible protein called for by the German 
(Wolff's) standard is none too large, and that it would be safe in 
the general run of cases to feed as much or even more protein 
