Ll 
a 
re A. 
a 
AP STUDY OF RATIONS FED TO MILCH COWS, 53 
The second ration cost a cent and a half a head less than the 
first, and taking the manurial value into account there is a saving 
of 2% cents per day in net cost of food. The second ration agrees 
very closely with the tentatively suggested standard ration. 
These six tests with three herds are summarized in the follow- 
ing table: 
Summary of Daily Rations Fed, and Daily Milk and Butter Vield 
Jrom Three Herds witha Wide and a Narrower Ration. 















a _| DAILY RATION PER Heo eee Cost a Or 
r= 43 DAILY: PRODUCE, 
| .o0 @ 
ls 2 [Rly Se w ay Pe : ++| I00 | 
RD. at, sige| 822125) 38) 2) 8 log Mile Bee 
ew? [se elseelee|/Y |S | ss = 
5 (A\BS 5 \se) Sis * Kaledseylsale¢ 
Pe eee |e | 4S) eee Siag 
Lbs. Inbs4Galories\ier:< |.Cts,|Cts-|Lbs.| Lbs.) $ )Cts: | Ctse) Crs 
- | 825 § |18] 2.15] 32,750 Gt 20,0 ld. oll 0:1)t.O7 ted er Olt 25 meee 
; P20 2-30) 20,4000) 577) 27.7\) G.8118.9; Logrici5s2).193)0 9 
; a 20| 1.49| 25,800 $..51 1826) (9.5) 13.01) 87) b-00) 53 i. 2Ia vant 
: 75 ( |23| 2.01} 24,700 B71 FO.31, 0-0] 17.0) 00) 1.031.50 } 20.1010 
C - 725 | Be). 1438) 251501) | 7.3) 19.4) 12:5) 13-7) (OS) 141 or 1" 30. [10 
; 25| 1.80] 22,400 Be FUT t Sit OQ: 02/3-0l e100) 19 30lue sek. 20m td 
825 |—| 2.06] 25,600 | | 
D.§ 750 |—|1.88] 23,250] + 5.6 — | —|—|—}]—|—-|—-/|— 
725 |—|1.81) 22,500 












* These rations are given in detail on pages 31, 35-36, 38 and 50-52. 
+ Total cost less value of the obtainable manure. 
+ Butter assumed to contain 85 per cent. butter-fat. 
§ Tentatively suggested standard ration. 
THE EFFECT OF NARROW RATIONS ON MILK FLOW AND BUTTER 
YIELD. 
At the time of the second test in each case the cows were six 
weeks farther along in the period of lactation and would in con- 
sequence have naturally reduced their milk flow and _ butter 
yield. It is impossible to say exactly how much this natural 
shrinkage would have been. In animals as near calving as some 
of these were the shrinkage would have probably been large, 
while in the case of the cows in “flush” the decrease would have 
been less marked. From a record of a herd of native cows and 
Ayrshires extending over 15 years, including 83 different animals 
and 21o calvings, the New York Experiment Station* concluded 
that “the natural falling off in milk for each month from calving 

* Annual Report New York Agricultural Experiment Station, 1886, pp. 21-23. 
